Annual report pursuant to Section 13 and 15(d)

COMPANY-SPONSORED EMPLOYEE BENEFIT PLANS - Fair Values of U.S. Pension and Postretirement Benefit Plan Assets by Asset Category as Well as the Percentage That Each Category Comprises of Total Plan Assets and the Respective Target Allocations (Detail)

v3.20.4
COMPANY-SPONSORED EMPLOYEE BENEFIT PLANS - Fair Values of U.S. Pension and Postretirement Benefit Plan Assets by Asset Category as Well as the Percentage That Each Category Comprises of Total Plan Assets and the Respective Target Allocations (Detail) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 54,881 $ 47,767  
Fair Value, Inputs, Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 28,655 24,161  
Fair Value, Inputs, Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 18,183 15,876  
Fair Value, Inputs, Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 65 12 $ 6
Fair Value, Inputs, Level 3 | Corporate Bonds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3 0 2
Fair Value, Inputs, Level 3 | Other      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 62 12 $ 4
United States      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 53,046 $ 46,209  
Percentage of Plan Assets 100.00% 100.00%  
United States | Cash and Cash Equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 1,593 $ 964  
Percentage of Plan Assets 3.00% 2.10%  
United States | Fair Value, Inputs, Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 28,212 $ 23,787  
United States | Fair Value, Inputs, Level 1 | Cash and Cash Equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,510 818  
United States | Fair Value, Inputs, Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 16,922 14,769  
United States | Fair Value, Inputs, Level 2 | Cash and Cash Equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 83 146  
United States | Fair Value, Inputs, Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3 0  
United States | Fair Value, Inputs, Level 3 | Cash and Cash Equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 0 $ 0  
United States | Minimum | Cash and Cash Equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets target allocation, Maximum 1.00% 1.00%  
United States | Maximum | Cash and Cash Equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets target allocation, Maximum 5.00% 5.00%  
United States | Equity securities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 19,045 $ 16,634  
Percentage of Plan Assets 35.90% 36.00%  
United States | Equity securities | U.S. Large Cap      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 8,294 $ 6,607  
United States | Equity securities | U.S. Small Cap      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 370 505  
United States | Equity securities | Emerging Markets      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2,106 2,039  
United States | Equity securities | Global Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3,940 2,892  
United States | Equity securities | International Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 4,335 4,591  
United States | Equity securities | Fair Value, Inputs, Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 11,812 9,840  
United States | Equity securities | Fair Value, Inputs, Level 1 | U.S. Large Cap      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 4,272 2,889  
United States | Equity securities | Fair Value, Inputs, Level 1 | U.S. Small Cap      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 370 376  
United States | Equity securities | Fair Value, Inputs, Level 1 | Emerging Markets      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,503 1,523  
United States | Equity securities | Fair Value, Inputs, Level 1 | Global Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3,624 2,553  
United States | Equity securities | Fair Value, Inputs, Level 1 | International Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2,043 2,499  
United States | Equity securities | Fair Value, Inputs, Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 7,233 6,794  
United States | Equity securities | Fair Value, Inputs, Level 2 | U.S. Large Cap      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 4,022 3,718  
United States | Equity securities | Fair Value, Inputs, Level 2 | U.S. Small Cap      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 129  
United States | Equity securities | Fair Value, Inputs, Level 2 | Emerging Markets      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 603 516  
United States | Equity securities | Fair Value, Inputs, Level 2 | Global Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 316 339  
United States | Equity securities | Fair Value, Inputs, Level 2 | International Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2,292 2,092  
United States | Equity securities | Fair Value, Inputs, Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
United States | Equity securities | Fair Value, Inputs, Level 3 | U.S. Large Cap      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
United States | Equity securities | Fair Value, Inputs, Level 3 | U.S. Small Cap      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
United States | Equity securities | Fair Value, Inputs, Level 3 | Emerging Markets      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
United States | Equity securities | Fair Value, Inputs, Level 3 | Global Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
United States | Equity securities | Fair Value, Inputs, Level 3 | International Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 0 $ 0  
United States | Equity securities | Minimum      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets target allocation, Maximum 25.00% 25.00%  
United States | Equity securities | Maximum      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets target allocation, Maximum 55.00% 55.00%  
United States | Other Investments [Member] | Hedge Funds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 3,518 $ 3,273  
Percentage of Plan Assets 6.60% 7.10%  
United States | Other Investments [Member] | Private Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 3,424 $ 3,030  
Percentage of Plan Assets 6.50% 6.60%  
United States | Other Investments [Member] | Private Debt      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 695 $ 772  
Percentage of Plan Assets 1.30% 1.70%  
United States | Other Investments [Member] | Structured Products      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 1,986 $ 1,940  
Percentage of Plan Assets 3.70% 4.20%  
United States | Other Investments [Member] | Risk Parity Funds [Domain]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 264 $ 241  
Percentage of Plan Assets 0.50% 0.50%  
United States | Other Investments [Member] | Structured Products [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 161 $ 153  
Percentage of Plan Assets 0.30% 0.30%  
United States | Other Investments [Member] | Fair Value, Inputs, Level 1 | Hedge Funds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 0 $ 0  
United States | Other Investments [Member] | Fair Value, Inputs, Level 1 | Private Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
United States | Other Investments [Member] | Fair Value, Inputs, Level 1 | Private Debt      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
United States | Other Investments [Member] | Fair Value, Inputs, Level 1 | Structured Products      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 244 149  
United States | Other Investments [Member] | Fair Value, Inputs, Level 1 | Risk Parity Funds [Domain]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
United States | Other Investments [Member] | Fair Value, Inputs, Level 1 | Structured Products [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
United States | Other Investments [Member] | Fair Value, Inputs, Level 2 | Hedge Funds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,652 1,380  
United States | Other Investments [Member] | Fair Value, Inputs, Level 2 | Private Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
United States | Other Investments [Member] | Fair Value, Inputs, Level 2 | Private Debt      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
United States | Other Investments [Member] | Fair Value, Inputs, Level 2 | Structured Products      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 82 74  
United States | Other Investments [Member] | Fair Value, Inputs, Level 2 | Risk Parity Funds [Domain]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
United States | Other Investments [Member] | Fair Value, Inputs, Level 2 | Structured Products [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 161 153  
United States | Other Investments [Member] | Fair Value, Inputs, Level 3 | Hedge Funds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
United States | Other Investments [Member] | Fair Value, Inputs, Level 3 | Private Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
United States | Other Investments [Member] | Fair Value, Inputs, Level 3 | Private Debt      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
United States | Other Investments [Member] | Fair Value, Inputs, Level 3 | Structured Products      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
United States | Other Investments [Member] | Fair Value, Inputs, Level 3 | Risk Parity Funds [Domain]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
United States | Other Investments [Member] | Fair Value, Inputs, Level 3 | Structured Products [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 0 $ 0  
United States | Other Investments [Member] | Minimum | Hedge Funds      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets target allocation, Maximum 5.00% 5.00%  
United States | Other Investments [Member] | Minimum | Private Equity      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets target allocation, Maximum 1.00% 1.00%  
United States | Other Investments [Member] | Minimum | Private Debt      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets target allocation, Maximum 1.00% 1.00%  
United States | Other Investments [Member] | Minimum | Structured Products      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets target allocation, Maximum 1.00% 1.00%  
United States | Other Investments [Member] | Minimum | Risk Parity Funds [Domain]      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets target allocation, Maximum 1.00% 1.00%  
United States | Other Investments [Member] | Minimum | Structured Products [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets target allocation, Maximum 1.00% 1.00%  
United States | Other Investments [Member] | Maximum | Hedge Funds      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets target allocation, Maximum 15.00% 15.00%  
United States | Other Investments [Member] | Maximum | Private Equity      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets target allocation, Maximum 10.00% 10.00%  
United States | Other Investments [Member] | Maximum | Private Debt      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets target allocation, Maximum 10.00% 10.00%  
United States | Other Investments [Member] | Maximum | Structured Products      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets target allocation, Maximum 10.00% 10.00%  
United States | Other Investments [Member] | Maximum | Risk Parity Funds [Domain]      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets target allocation, Maximum 10.00% 10.00%  
United States | Other Investments [Member] | Maximum | Structured Products [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets target allocation, Maximum 5.00% 5.00%  
United States | Fixed Income Securities [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 22,360 $ 19,202  
Percentage of Plan Assets 42.20% 41.50%  
United States | Fixed Income Securities [Member] | U.S. Government Securities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 16,145 $ 14,077  
United States | Fixed Income Securities [Member] | Corporate Bonds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 6,146 5,051  
United States | Fixed Income Securities [Member] | Global Bonds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 42 50  
United States | Fixed Income Securities [Member] | Municipal Bonds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 27 24  
United States | Fixed Income Securities [Member] | Fair Value, Inputs, Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 14,646 12,980  
United States | Fixed Income Securities [Member] | Fair Value, Inputs, Level 1 | U.S. Government Securities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 14,646 12,980  
United States | Fixed Income Securities [Member] | Fair Value, Inputs, Level 1 | Corporate Bonds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
United States | Fixed Income Securities [Member] | Fair Value, Inputs, Level 1 | Global Bonds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
United States | Fixed Income Securities [Member] | Fair Value, Inputs, Level 1 | Municipal Bonds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
United States | Fixed Income Securities [Member] | Fair Value, Inputs, Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 7,711 6,222  
United States | Fixed Income Securities [Member] | Fair Value, Inputs, Level 2 | U.S. Government Securities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,499 1,097  
United States | Fixed Income Securities [Member] | Fair Value, Inputs, Level 2 | Corporate Bonds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 6,143 5,051  
United States | Fixed Income Securities [Member] | Fair Value, Inputs, Level 2 | Global Bonds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 42 50  
United States | Fixed Income Securities [Member] | Fair Value, Inputs, Level 2 | Municipal Bonds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 27 24  
United States | Fixed Income Securities [Member] | Fair Value, Inputs, Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3 0  
United States | Fixed Income Securities [Member] | Fair Value, Inputs, Level 3 | U.S. Government Securities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
United States | Fixed Income Securities [Member] | Fair Value, Inputs, Level 3 | Corporate Bonds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3 0  
United States | Fixed Income Securities [Member] | Fair Value, Inputs, Level 3 | Global Bonds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
United States | Fixed Income Securities [Member] | Fair Value, Inputs, Level 3 | Municipal Bonds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 0 $ 0  
United States | Fixed Income Securities [Member] | Minimum      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets target allocation, Maximum 35.00% 35.00%  
United States | Fixed Income Securities [Member] | Maximum      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets target allocation, Maximum 55.00% 55.00%  
International Pension Benefits      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 1,835 $ 1,558  
Percentage of Plan Assets 100.00% 100.00%  
International Pension Benefits | Cash and Cash Equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 84 $ 72  
Percentage of Plan Assets 4.60% 4.60%  
International Pension Benefits | Fair Value, Inputs, Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 443 $ 374  
International Pension Benefits | Fair Value, Inputs, Level 1 | Cash and Cash Equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 45 32  
International Pension Benefits | Fair Value, Inputs, Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,261 1,107  
International Pension Benefits | Fair Value, Inputs, Level 2 | Cash and Cash Equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 39 40  
International Pension Benefits | Fair Value, Inputs, Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 62 12  
International Pension Benefits | Fair Value, Inputs, Level 3 | Cash and Cash Equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 0 $ 0  
International Pension Benefits | Minimum | Cash and Cash Equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets target allocation, Maximum 1.00% 1.00%  
International Pension Benefits | Maximum | Cash and Cash Equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets target allocation, Maximum 10.00% 10.00%  
International Pension Benefits | Equity securities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 862 $ 730  
Percentage of Plan Assets 47.00% 46.80%  
International Pension Benefits | Equity securities | Emerging Markets      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 55 $ 33  
International Pension Benefits | Equity securities | International Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 534 441  
International Pension Benefits | Equity securities | local market equity [Domain]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 214 209  
International Pension Benefits | Equity securities | U.S. Equity [Domain]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 59 47  
International Pension Benefits | Equity securities | Fair Value, Inputs, Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 251 212  
International Pension Benefits | Equity securities | Fair Value, Inputs, Level 1 | Emerging Markets      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 41 33  
International Pension Benefits | Equity securities | Fair Value, Inputs, Level 1 | International Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 210 179  
International Pension Benefits | Equity securities | Fair Value, Inputs, Level 1 | local market equity [Domain]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
International Pension Benefits | Equity securities | Fair Value, Inputs, Level 1 | U.S. Equity [Domain]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
International Pension Benefits | Equity securities | Fair Value, Inputs, Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 611 518  
International Pension Benefits | Equity securities | Fair Value, Inputs, Level 2 | Emerging Markets      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 14 0  
International Pension Benefits | Equity securities | Fair Value, Inputs, Level 2 | International Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 324 262  
International Pension Benefits | Equity securities | Fair Value, Inputs, Level 2 | local market equity [Domain]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 214 209  
International Pension Benefits | Equity securities | Fair Value, Inputs, Level 2 | U.S. Equity [Domain]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 59 47  
International Pension Benefits | Equity securities | Fair Value, Inputs, Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
International Pension Benefits | Equity securities | Fair Value, Inputs, Level 3 | Emerging Markets      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
International Pension Benefits | Equity securities | Fair Value, Inputs, Level 3 | International Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
International Pension Benefits | Equity securities | Fair Value, Inputs, Level 3 | local market equity [Domain]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
International Pension Benefits | Equity securities | Fair Value, Inputs, Level 3 | U.S. Equity [Domain]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 0 $ 0  
International Pension Benefits | Equity securities | Minimum      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets target allocation, Maximum 25.00% 30.00%  
International Pension Benefits | Equity securities | Maximum      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets target allocation, Maximum 55.00% 60.00%  
International Pension Benefits | Other Investments [Member] | Structured Products      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 154 $ 128  
Percentage of Plan Assets 8.30% 8.20%  
International Pension Benefits | Other Investments [Member] | Other      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 293 $ 247  
Percentage of Plan Assets 16.00% 15.90%  
International Pension Benefits | Other Investments [Member] | Fair Value, Inputs, Level 1 | Structured Products      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 0 $ 0  
International Pension Benefits | Other Investments [Member] | Fair Value, Inputs, Level 1 | Other      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
International Pension Benefits | Other Investments [Member] | Fair Value, Inputs, Level 2 | Structured Products      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 80 80  
International Pension Benefits | Other Investments [Member] | Fair Value, Inputs, Level 2 | Other      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 236 218  
International Pension Benefits | Other Investments [Member] | Fair Value, Inputs, Level 3 | Structured Products      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 21 0  
International Pension Benefits | Other Investments [Member] | Fair Value, Inputs, Level 3 | Other      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 41 $ 12  
International Pension Benefits | Other Investments [Member] | Minimum | Structured Products      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets target allocation, Maximum 5.00% 5.00%  
International Pension Benefits | Other Investments [Member] | Minimum | Other      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets target allocation, Maximum 1.00% 1.00%  
International Pension Benefits | Other Investments [Member] | Maximum | Structured Products      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets target allocation, Maximum 10.00% 10.00%  
International Pension Benefits | Other Investments [Member] | Maximum | Other      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets target allocation, Maximum 20.00% 20.00%  
International Pension Benefits | Fixed Income Securities [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 442 $ 381  
Percentage of Plan Assets 24.10% 24.50%  
International Pension Benefits | Fixed Income Securities [Member] | Corporate Bonds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 215 $ 177  
International Pension Benefits | Fixed Income Securities [Member] | Global Bonds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 125 110  
International Pension Benefits | Fixed Income Securities [Member] | Foreign Government Debt [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 102 94  
International Pension Benefits | Fixed Income Securities [Member] | Fair Value, Inputs, Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 147 130  
International Pension Benefits | Fixed Income Securities [Member] | Fair Value, Inputs, Level 1 | Corporate Bonds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 22 20  
International Pension Benefits | Fixed Income Securities [Member] | Fair Value, Inputs, Level 1 | Global Bonds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 125 110  
International Pension Benefits | Fixed Income Securities [Member] | Fair Value, Inputs, Level 1 | Foreign Government Debt [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
International Pension Benefits | Fixed Income Securities [Member] | Fair Value, Inputs, Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 295 251  
International Pension Benefits | Fixed Income Securities [Member] | Fair Value, Inputs, Level 2 | Corporate Bonds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 193 157  
International Pension Benefits | Fixed Income Securities [Member] | Fair Value, Inputs, Level 2 | Global Bonds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
International Pension Benefits | Fixed Income Securities [Member] | Fair Value, Inputs, Level 2 | Foreign Government Debt [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 102 94  
International Pension Benefits | Fixed Income Securities [Member] | Fair Value, Inputs, Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
International Pension Benefits | Fixed Income Securities [Member] | Fair Value, Inputs, Level 3 | Corporate Bonds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
International Pension Benefits | Fixed Income Securities [Member] | Fair Value, Inputs, Level 3 | Global Bonds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
International Pension Benefits | Fixed Income Securities [Member] | Fair Value, Inputs, Level 3 | Foreign Government Debt [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 0 $ 0  
International Pension Benefits | Fixed Income Securities [Member] | Minimum      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets target allocation, Maximum 20.00% 25.00%  
International Pension Benefits | Fixed Income Securities [Member] | Maximum      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets target allocation, Maximum 40.00% 45.00%