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)

v3.10.0.1
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
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 40,864 $ 43,448  
Plan assets target allocation 100.00% 100.00%  
Fair Value, Inputs, Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 20,696 $ 23,664  
Fair Value, Inputs, Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 12,723 12,926  
Fair Value, Inputs, Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 6 8  
Fair Value, Inputs, Level 3 | Corporate Bonds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2 8 $ 0
Fair Value, Inputs, Level 3 | Hedge Funds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 4 0 0
Fair Value, Inputs, Level 3 | Structured Products      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 6 8 $ 0
Domestic      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 39,580 $ 42,115  
Percentage of Plan Assets 100.00% 100.00%  
Domestic | Cash and Cash Equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 157 $ 5,725  
Percentage of Plan Assets 0.40% 13.60%  
Domestic | Fair Value, Inputs, Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 20,404 $ 23,333  
Domestic | Fair Value, Inputs, Level 1 | Cash and Cash Equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 108 5,292  
Domestic | Fair Value, Inputs, Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 11,793 11,978  
Domestic | Fair Value, Inputs, Level 2 | Cash and Cash Equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 49 433  
Domestic | Fair Value, Inputs, Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2 8  
Domestic | Fair Value, Inputs, Level 3 | Cash and Cash Equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 0 $ 0  
Domestic | Minimum | Cash and Cash Equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets target allocation, Maximum 0.00% 0.00%  
Domestic | Maximum | Cash and Cash Equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets target allocation, Maximum 5.00% 5.00%  
Domestic | Equity securities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 13,667 $ 16,224  
Percentage of Plan Assets 34.50% 38.50%  
Domestic | Equity securities | U.S. Large Cap      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 5,276 $ 5,924  
Domestic | Equity securities | U.S. Small Cap      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 542 591  
Domestic | Equity securities | Emerging Markets      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,859 2,101  
Domestic | Equity securities | Global Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2,320 2,817  
Domestic | Equity securities | International Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3,670 4,791  
Domestic | Equity securities | Fair Value, Inputs, Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 8,222 10,561  
Domestic | Equity securities | Fair Value, Inputs, Level 1 | U.S. Large Cap      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2,155 3,121  
Domestic | Equity securities | Fair Value, Inputs, Level 1 | U.S. Small Cap      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 386 421  
Domestic | Equity securities | Fair Value, Inputs, Level 1 | Emerging Markets      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,436 1,669  
Domestic | Equity securities | Fair Value, Inputs, Level 1 | Global Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2,056 2,400  
Domestic | Equity securities | Fair Value, Inputs, Level 1 | International Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2,189 2,950  
Domestic | Equity securities | Fair Value, Inputs, Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 5,445 5,663  
Domestic | Equity securities | Fair Value, Inputs, Level 2 | U.S. Large Cap      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3,121 2,803  
Domestic | Equity securities | Fair Value, Inputs, Level 2 | U.S. Small Cap      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 156 170  
Domestic | Equity securities | Fair Value, Inputs, Level 2 | Emerging Markets      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 423 432  
Domestic | Equity securities | Fair Value, Inputs, Level 2 | Global Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 264 417  
Domestic | Equity securities | Fair Value, Inputs, Level 2 | International Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,481 1,841  
Domestic | Equity securities | Fair Value, Inputs, Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Domestic | Equity securities | Fair Value, Inputs, Level 3 | U.S. Large Cap      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Domestic | Equity securities | Fair Value, Inputs, Level 3 | U.S. Small Cap      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Domestic | Equity securities | Fair Value, Inputs, Level 3 | Emerging Markets      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Domestic | Equity securities | Fair Value, Inputs, Level 3 | Global Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Domestic | Equity securities | Fair Value, Inputs, Level 3 | International Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 0 $ 0  
Domestic | Equity securities | Minimum      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets target allocation, Maximum 25.00% 35.00%  
Domestic | Equity securities | Maximum      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets target allocation, Maximum 55.00% 55.00%  
Domestic | Fixed Income Securities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 16,669 $ 11,634  
Percentage of Plan Assets 42.10% 27.60%  
Domestic | Fixed Income Securities | Global Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 55 $ 53  
Domestic | Fixed Income Securities | U.S. Government Securities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 12,295 7,695  
Domestic | Fixed Income Securities | Corporate Bonds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 4,303 3,865  
Domestic | Fixed Income Securities | Municipal Bonds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 16 21  
Domestic | Fixed Income Securities | Fair Value, Inputs, Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 11,922 7,323  
Domestic | Fixed Income Securities | Fair Value, Inputs, Level 1 | Global Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Domestic | Fixed Income Securities | Fair Value, Inputs, Level 1 | U.S. Government Securities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 11,922 7,323  
Domestic | Fixed Income Securities | Fair Value, Inputs, Level 1 | Corporate Bonds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Domestic | Fixed Income Securities | Fair Value, Inputs, Level 1 | Municipal Bonds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Domestic | Fixed Income Securities | Fair Value, Inputs, Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 4,745 4,303  
Domestic | Fixed Income Securities | Fair Value, Inputs, Level 2 | Global Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 55 53  
Domestic | Fixed Income Securities | Fair Value, Inputs, Level 2 | U.S. Government Securities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 373 372  
Domestic | Fixed Income Securities | Fair Value, Inputs, Level 2 | Corporate Bonds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 4,301 3,857  
Domestic | Fixed Income Securities | Fair Value, Inputs, Level 2 | Municipal Bonds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 16 21  
Domestic | Fixed Income Securities | Fair Value, Inputs, Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2 8  
Domestic | Fixed Income Securities | Fair Value, Inputs, Level 3 | Global Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Domestic | Fixed Income Securities | Fair Value, Inputs, Level 3 | U.S. Government Securities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Domestic | Fixed Income Securities | Fair Value, Inputs, Level 3 | Corporate Bonds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2 8  
Domestic | Fixed Income Securities | Fair Value, Inputs, Level 3 | Municipal Bonds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 0 $ 0  
Domestic | Fixed Income Securities | Minimum      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets target allocation, Maximum 35.00% 25.00%  
Domestic | Fixed Income Securities | Maximum      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets target allocation, Maximum 55.00% 35.00%  
Domestic | Other Investments [Member] | Hedge Funds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 3,154 $ 2,910  
Percentage of Plan Assets 8.00% 6.90%  
Domestic | Other Investments [Member] | Private Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 2,763 $ 2,107  
Percentage of Plan Assets 7.00% 5.00%  
Domestic | Other Investments [Member] | Private Debt      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 836 $ 953  
Percentage of Plan Assets 2.10% 2.30%  
Domestic | Other Investments [Member] | Structured Products      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 1,989 $ 2,031  
Percentage of Plan Assets 5.00% 4.80%  
Domestic | Other Investments [Member] | Risk Parity Funds [Domain]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 207 $ 359  
Percentage of Plan Assets 0.50% 0.90%  
Domestic | Other Investments [Member] | Asset-backed Securities [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   $ 172  
Percentage of Plan Assets   0.40%  
Domestic | Other Investments [Member] | Structured Products [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 138    
Percentage of Plan Assets 0.40%    
Domestic | Other Investments [Member] | Fair Value, Inputs, Level 1 | Hedge Funds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 0 $ 0  
Domestic | Other Investments [Member] | Fair Value, Inputs, Level 1 | Private Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Domestic | Other Investments [Member] | Fair Value, Inputs, Level 1 | Private Debt      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Domestic | Other Investments [Member] | Fair Value, Inputs, Level 1 | Structured Products      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 152 157  
Domestic | 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  
Domestic | Other Investments [Member] | Fair Value, Inputs, Level 1 | Asset-backed Securities [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   0  
Domestic | Other Investments [Member] | Fair Value, Inputs, Level 1 | Structured Products [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0    
Domestic | Other Investments [Member] | Fair Value, Inputs, Level 2 | Hedge Funds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,185 1,031  
Domestic | Other Investments [Member] | Fair Value, Inputs, Level 2 | Private Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Domestic | Other Investments [Member] | Fair Value, Inputs, Level 2 | Private Debt      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 178 237  
Domestic | Other Investments [Member] | Fair Value, Inputs, Level 2 | Structured Products      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 53 139  
Domestic | 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  
Domestic | Other Investments [Member] | Fair Value, Inputs, Level 2 | Asset-backed Securities [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   172  
Domestic | Other Investments [Member] | Fair Value, Inputs, Level 2 | Structured Products [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 138    
Domestic | Other Investments [Member] | Fair Value, Inputs, Level 3 | Hedge Funds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Domestic | Other Investments [Member] | Fair Value, Inputs, Level 3 | Private Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Domestic | Other Investments [Member] | Fair Value, Inputs, Level 3 | Private Debt      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Domestic | Other Investments [Member] | Fair Value, Inputs, Level 3 | Structured Products      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Domestic | 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  
Domestic | Other Investments [Member] | Fair Value, Inputs, Level 3 | Asset-backed Securities [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   $ 0  
Domestic | Other Investments [Member] | Fair Value, Inputs, Level 3 | Structured Products [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 0    
Domestic | Other Investments [Member] | Minimum | Hedge Funds      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets target allocation, Maximum 5.00% 5.00%  
Domestic | Other Investments [Member] | Minimum | Private Equity      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets target allocation, Maximum 1.00% 1.00%  
Domestic | Other Investments [Member] | Minimum | Structured Products      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets target allocation, Maximum 1.00% 1.00%  
Domestic | Other Investments [Member] | Minimum | Other      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets target allocation, Maximum 1.00% 1.00%  
Domestic | Other Investments [Member] | Minimum | Structured Products [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets target allocation, Maximum 1.00% 0.00%  
Domestic | Other Investments [Member] | Maximum | Hedge Funds      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets target allocation, Maximum 15.00% 15.00%  
Domestic | Other Investments [Member] | Maximum | Private Equity      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets target allocation, Maximum 10.00% 10.00%  
Domestic | Other Investments [Member] | Maximum | Structured Products      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets target allocation, Maximum 10.00% 10.00%  
Domestic | Other Investments [Member] | Maximum | Other      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets target allocation, Maximum 10.00% 10.00%  
Domestic | Other Investments [Member] | Maximum | Structured Products [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets target allocation, Maximum 5.00% 5.00%  
International Package      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 1,284 $ 1,333  
Percentage of Plan Assets 100.00% 100.00%  
International Package | Cash and Cash Equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 45 $ 78  
Percentage of Plan Assets 3.50% 5.80%  
International Package | Fair Value, Inputs, Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 292 $ 331  
International Package | Fair Value, Inputs, Level 1 | Cash and Cash Equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 4 43  
International Package | Fair Value, Inputs, Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 930 948  
International Package | Fair Value, Inputs, Level 2 | Cash and Cash Equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 41 35  
International Package | Fair Value, Inputs, Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 4 0  
International Package | Fair Value, Inputs, Level 3 | Cash and Cash Equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 0 $ 0  
International Package | Minimum | Cash and Cash Equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets target allocation, Maximum 1.00% 0.00%  
International Package | Maximum | Cash and Cash Equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets target allocation, Maximum 10.00% 10.00%  
International Package | Equity securities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 586 $ 637  
Percentage of Plan Assets 45.60% 47.70%  
International Package | Equity securities | Emerging Markets      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 33 $ 38  
International Package | Equity securities | International Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 348 356  
International Package | Equity securities | local market equity [Domain]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 171 213  
International Package | Equity securities | U.S. Equity [Domain]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 34 30  
International Package | Equity securities | Fair Value, Inputs, Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 183 204  
International Package | Equity securities | Fair Value, Inputs, Level 1 | Emerging Markets      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 33 38  
International Package | Equity securities | Fair Value, Inputs, Level 1 | International Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 150 166  
International Package | 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 Package | 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 Package | Equity securities | Fair Value, Inputs, Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 403 433  
International Package | Equity securities | Fair Value, Inputs, Level 2 | Emerging Markets      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
International Package | Equity securities | Fair Value, Inputs, Level 2 | International Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 198 190  
International Package | Equity securities | Fair Value, Inputs, Level 2 | local market equity [Domain]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 171 213  
International Package | Equity securities | Fair Value, Inputs, Level 2 | U.S. Equity [Domain]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 34 30  
International Package | Equity securities | Fair Value, Inputs, Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
International Package | Equity securities | Fair Value, Inputs, Level 3 | Emerging Markets      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
International Package | Equity securities | Fair Value, Inputs, Level 3 | International Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
International Package | 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 Package | 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 Package | Equity securities | Minimum      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets target allocation, Maximum 30.00% 30.00%  
International Package | Equity securities | Maximum      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets target allocation, Maximum 60.00% 60.00%  
International Package | Fixed Income Securities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 324 $ 301  
Percentage of Plan Assets 25.20% 22.60%  
International Package | Fixed Income Securities | Corporate Bonds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 195 $ 198  
International Package | Fixed Income Securities | Foreign Government Debt [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 102 103  
International Package | Fixed Income Securities | Fair Value, Inputs, Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 105 84  
International Package | Fixed Income Securities | Fair Value, Inputs, Level 1 | Corporate Bonds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 54 59  
International Package | Fixed Income Securities | Fair Value, Inputs, Level 1 | Foreign Government Debt [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 24 25  
International Package | Fixed Income Securities | Fair Value, Inputs, Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 219 217  
International Package | Fixed Income Securities | Fair Value, Inputs, Level 2 | Corporate Bonds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 141 139  
International Package | Fixed Income Securities | Fair Value, Inputs, Level 2 | Foreign Government Debt [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 78 78  
International Package | Fixed Income Securities | Fair Value, Inputs, Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
International Package | Fixed Income Securities | Fair Value, Inputs, Level 3 | Corporate Bonds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
International Package | Fixed Income Securities | Fair Value, Inputs, Level 3 | Foreign Government Debt [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 0 $ 0  
International Package | Fixed Income Securities | Minimum      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets target allocation, Maximum 25.00% 25.00%  
International Package | Fixed Income Securities | Maximum      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets target allocation, Maximum 45.00% 50.00%  
International Package | Other Investments [Member] | Structured Products      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 121 $ 124  
Percentage of Plan Assets 9.40% 9.30%  
International Package | Other Investments [Member] | Other      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 208 $ 193  
Percentage of Plan Assets 16.30% 14.60%  
International Package | Other Investments [Member] | Fair Value, Inputs, Level 1 | Structured Products      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 0 $ 0  
International Package | Other Investments [Member] | Fair Value, Inputs, Level 1 | Other      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
International Package | Other Investments [Member] | Fair Value, Inputs, Level 2 | Structured Products      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 76 79  
International Package | Other Investments [Member] | Fair Value, Inputs, Level 2 | Other      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 191 184  
International Package | Other Investments [Member] | Fair Value, Inputs, Level 3 | Structured Products      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
International Package | Other Investments [Member] | Fair Value, Inputs, Level 3 | Other      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 4 $ 0  
International Package | Other Investments [Member] | Minimum | Structured Products      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets target allocation, Maximum 5.00% 5.00%  
International Package | Other Investments [Member] | Minimum | Other      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets target allocation, Maximum 1.00% 0.00%  
International Package | Other Investments [Member] | Minimum | Structured Products [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets target allocation, Maximum 0.00% 0.00%  
International Package | Other Investments [Member] | Maximum | Structured Products      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets target allocation, Maximum 10.00% 10.00%  
International Package | Other Investments [Member] | Maximum | Other      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets target allocation, Maximum 20.00% 20.00%  
International Package | Other Investments [Member] | Maximum | Structured Products [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets target allocation, Maximum 10.00% 0.00%