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)

v3.6.0.2
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, 2016
Dec. 31, 2015
Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 0 $ 55  
Plan assets target allocation 100.00% 100.00%  
Fair Value, Inputs, Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 32,322 $ 30,031  
Fair Value, Inputs, Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 15,030 13,851  
Fair Value, Inputs, Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 11,043 7,870  
Fair Value, Inputs, Level 3 | Corporate Bonds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 6 $ 8
Fair Value, Inputs, Level 3 | Hedge Funds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 49 53
Fair Value, Inputs, Level 3 | Structured Products      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 55 61
U.S. Postretirement Medical Benefits      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 15 130 $ 259
Domestic      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 0 $ 6  
Percentage of Plan Assets 100.00% 100.00%  
Domestic | Cash and Cash Equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 0 $ 0  
Percentage of Plan Assets 1.00% 2.80%  
Plan assets target allocation, Minimum 0.00% 0.00%  
Plan assets target allocation, Maximum 5.00% 5.00%  
Domestic | Fair Value, Inputs, Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 31,230 $ 29,017  
Domestic | Fair Value, Inputs, Level 1 | Cash and Cash Equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 304 811  
Domestic | Fair Value, Inputs, Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 14,753 13,465  
Domestic | Fair Value, Inputs, Level 2 | Cash and Cash Equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 102 716  
Domestic | Fair Value, Inputs, Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 10,270 7,333  
Domestic | Fair Value, Inputs, Level 3 | Cash and Cash Equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 202 95  
Domestic | Equity securities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 0 $ 0  
Percentage of Plan Assets 39.90% 41.50%  
Plan assets target allocation, Minimum 35.00% 25.00%  
Plan assets target allocation, Maximum 55.00% 55.00%  
Domestic | Equity securities | U.S. Large Cap      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 0 $ 0  
Domestic | Equity securities | U.S. Small Cap      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Domestic | Equity securities | Emerging Markets      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Domestic | Equity securities | Global Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Domestic | Equity securities | International Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Domestic | Equity securities | Fair Value, Inputs, Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 12,450 12,048  
Domestic | Equity securities | Fair Value, Inputs, Level 1 | U.S. Large Cap      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 4,883 4,246  
Domestic | Equity securities | Fair Value, Inputs, Level 1 | U.S. Small Cap      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 542 352  
Domestic | Equity securities | Fair Value, Inputs, Level 1 | Emerging Markets      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,396 1,426  
Domestic | Equity securities | Fair Value, Inputs, Level 1 | Global Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2,603 2,935  
Domestic | Equity securities | Fair Value, Inputs, Level 1 | International Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3,026 3,089  
Domestic | Equity securities | Fair Value, Inputs, Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 8,708 9,366  
Domestic | Equity securities | Fair Value, Inputs, Level 2 | U.S. Large Cap      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2,327 2,542  
Domestic | Equity securities | Fair Value, Inputs, Level 2 | U.S. Small Cap      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 393 310  
Domestic | Equity securities | Fair Value, Inputs, Level 2 | Emerging Markets      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,236 1,271  
Domestic | Equity securities | Fair Value, Inputs, Level 2 | Global Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2,555 2,935  
Domestic | Equity securities | Fair Value, Inputs, Level 2 | International Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2,197 2,308  
Domestic | Equity securities | Fair Value, Inputs, Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3,742 2,682  
Domestic | Equity securities | Fair Value, Inputs, Level 3 | U.S. Large Cap      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2,556 1,704  
Domestic | Equity securities | Fair Value, Inputs, Level 3 | U.S. Small Cap      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 149 42  
Domestic | Equity securities | Fair Value, Inputs, Level 3 | Emerging Markets      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 160 155  
Domestic | Equity securities | Fair Value, Inputs, Level 3 | Global Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 48 0  
Domestic | Equity securities | Fair Value, Inputs, Level 3 | International Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 829 781  
Domestic | Fixed Income Securities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 0 $ 6  
Percentage of Plan Assets 34.60% 28.20%  
Plan assets target allocation, Minimum 25.00% 15.00%  
Plan assets target allocation, Maximum 35.00% 35.00%  
Domestic | Fixed Income Securities | Global Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 0 $ 0  
Domestic | Fixed Income Securities | U.S. Government Securities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Domestic | Fixed Income Securities | Corporate Bonds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 6  
Domestic | Fixed Income Securities | Municipal Bonds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Domestic | Fixed Income Securities | Fair Value, Inputs, Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 10,850 8,199  
Domestic | Fixed Income Securities | Fair Value, Inputs, Level 1 | Global Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 161 733  
Domestic | Fixed Income Securities | Fair Value, Inputs, Level 1 | U.S. Government Securities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 6,173 3,469  
Domestic | Fixed Income Securities | Fair Value, Inputs, Level 1 | Corporate Bonds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 4,492 3,961  
Domestic | Fixed Income Securities | Fair Value, Inputs, Level 1 | Municipal Bonds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 24 36  
Domestic | Fixed Income Securities | Fair Value, Inputs, Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 5,821 3,257  
Domestic | Fixed Income Securities | Fair Value, Inputs, Level 2 | Global Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Domestic | Fixed Income Securities | Fair Value, Inputs, Level 2 | U.S. Government Securities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 5,821 3,257  
Domestic | Fixed Income Securities | Fair Value, Inputs, Level 2 | Corporate Bonds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Domestic | Fixed Income Securities | Fair Value, Inputs, Level 2 | Municipal Bonds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Domestic | Fixed Income Securities | Fair Value, Inputs, Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 4,927 4,077  
Domestic | Fixed Income Securities | Fair Value, Inputs, Level 3 | Global Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 59 147  
Domestic | Fixed Income Securities | Fair Value, Inputs, Level 3 | U.S. Government Securities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 352 212  
Domestic | Fixed Income Securities | Fair Value, Inputs, Level 3 | Corporate Bonds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 4,492 3,682  
Domestic | Fixed Income Securities | Fair Value, Inputs, Level 3 | Municipal Bonds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 24 36  
Domestic | Other Investments [Member] | Hedge Funds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 0 $ 0  
Percentage of Plan Assets 9.20% 12.50%  
Plan assets target allocation, Minimum 5.00% 8.00%  
Plan assets target allocation, Maximum 15.00% 15.00%  
Domestic | Other Investments [Member] | Private Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 0 $ 0  
Percentage of Plan Assets 5.50% 4.90%  
Plan assets target allocation, Minimum 1.00% 3.00%  
Plan assets target allocation, Maximum 10.00% 10.00%  
Domestic | Other Investments [Member] | Private Debt      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 0    
Percentage of Plan Assets 1.60%    
Domestic | Other Investments [Member] | Structured Products      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 0 $ 0  
Percentage of Plan Assets 5.60% 6.40%  
Plan assets target allocation, Minimum 1.00% 3.00%  
Plan assets target allocation, Maximum 10.00% 10.00%  
Domestic | Other Investments [Member] | Risk Parity Funds [Domain]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets [1] $ 0 $ 0  
Percentage of Plan Assets [1] 1.00% 2.60%  
Domestic | Other Investments [Member] | Asset-backed Securities [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   $ 0  
Percentage of Plan Assets   1.10%  
Domestic | Other Investments [Member] | Other      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets target allocation, Minimum [1] 1.00% 1.00%  
Plan assets target allocation, Maximum [1] 10.00% 10.00%  
Domestic | Other Investments [Member] | Structured Products [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets [2] $ 0    
Percentage of Plan Assets [2] 1.60%    
Plan assets target allocation, Minimum [2] 0.00% 0.00%  
Plan assets target allocation, Maximum [2] 5.00% 5.00%  
Domestic | Other Investments [Member] | Fair Value, Inputs, Level 1 | Hedge Funds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 2,867 $ 3,617  
Domestic | Other Investments [Member] | Fair Value, Inputs, Level 1 | Private Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,716 1,415  
Domestic | Other Investments [Member] | Fair Value, Inputs, Level 1 | Private Debt      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 496    
Domestic | Other Investments [Member] | Fair Value, Inputs, Level 1 | Structured Products      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,734 1,848  
Domestic | Other Investments [Member] | Fair Value, Inputs, Level 1 | Risk Parity Funds [Domain]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets [1] 321 755  
Domestic | Other Investments [Member] | Fair Value, Inputs, Level 1 | Asset-backed Securities [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   324  
Domestic | Other Investments [Member] | Fair Value, Inputs, Level 1 | Structured Products [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets [2] 492    
Domestic | Other Investments [Member] | Fair Value, Inputs, Level 2 | Hedge Funds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
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 0    
Domestic | Other Investments [Member] | Fair Value, Inputs, Level 2 | Structured Products      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 122 126  
Domestic | Other Investments [Member] | Fair Value, Inputs, Level 2 | Risk Parity Funds [Domain]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets [1] 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   0  
Domestic | Other Investments [Member] | Fair Value, Inputs, Level 2 | Structured Products [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets [2] 0    
Domestic | Other Investments [Member] | Fair Value, Inputs, Level 3 | Hedge Funds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 763 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    
Domestic | Other Investments [Member] | Fair Value, Inputs, Level 3 | Structured Products      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 144 155  
Domestic | Other Investments [Member] | Fair Value, Inputs, Level 3 | Risk Parity Funds [Domain]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets [1] 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   324  
Domestic | Other Investments [Member] | Fair Value, Inputs, Level 3 | Structured Products [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets [2] 492    
International [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 0 $ 49  
Percentage of Plan Assets 100.00% 100.00%  
International [Member] | Cash and Cash Equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 0 $ 0  
Percentage of Plan Assets 4.90% 2.50%  
Plan assets target allocation, Minimum 0.00% 0.00%  
Plan assets target allocation, Maximum 5.00% 5.00%  
International [Member] | Fair Value, Inputs, Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 1,092 $ 1,014  
International [Member] | Fair Value, Inputs, Level 1 | Cash and Cash Equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 54 25  
International [Member] | Fair Value, Inputs, Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 277 386  
International [Member] | Fair Value, Inputs, Level 2 | Cash and Cash Equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 37 9  
International [Member] | Fair Value, Inputs, Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 773 537  
International [Member] | Fair Value, Inputs, Level 3 | Cash and Cash Equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 17 16  
International [Member] | Equity securities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 0 $ 0  
Percentage of Plan Assets 47.70% 44.10%  
Plan assets target allocation, Minimum 50.00% 50.00%  
Plan assets target allocation, Maximum 65.00% 65.00%  
International [Member] | Equity securities | Emerging Markets      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 0 $ 0  
International [Member] | Equity securities | International Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
International [Member] | Equity securities | local market equity [Domain]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
International [Member] | Equity securities | U.S. Equity [Domain]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
International [Member] | Equity securities | Fair Value, Inputs, Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 522 448  
International [Member] | Equity securities | Fair Value, Inputs, Level 1 | Emerging Markets      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 26 16  
International [Member] | Equity securities | Fair Value, Inputs, Level 1 | International Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 288 176  
International [Member] | Equity securities | Fair Value, Inputs, Level 1 | local market equity [Domain]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 188 240  
International [Member] | Equity securities | Fair Value, Inputs, Level 1 | U.S. Equity [Domain]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 20 16  
International [Member] | Equity securities | Fair Value, Inputs, Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 167 249  
International [Member] | Equity securities | Fair Value, Inputs, Level 2 | Emerging Markets      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 26 16  
International [Member] | Equity securities | Fair Value, Inputs, Level 2 | International Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 141 84  
International [Member] | Equity securities | Fair Value, Inputs, Level 2 | local market equity [Domain]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 133  
International [Member] | Equity securities | Fair Value, Inputs, Level 2 | U.S. Equity [Domain]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 16  
International [Member] | Equity securities | Fair Value, Inputs, Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 355 199  
International [Member] | Equity securities | Fair Value, Inputs, Level 3 | Emerging Markets      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
International [Member] | Equity securities | Fair Value, Inputs, Level 3 | International Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 147 92  
International [Member] | Equity securities | Fair Value, Inputs, Level 3 | local market equity [Domain]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 188 107  
International [Member] | Equity securities | Fair Value, Inputs, Level 3 | U.S. Equity [Domain]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 20 0  
International [Member] | Fixed Income Securities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 0 $ 0  
Percentage of Plan Assets 22.20% 21.80%  
Plan assets target allocation, Minimum 15.00% 15.00%  
Plan assets target allocation, Maximum 35.00% 35.00%  
International [Member] | Fixed Income Securities | Corporate Bonds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 0 $ 0  
International [Member] | Fixed Income Securities | Foreign Government Debt [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
International [Member] | Fixed Income Securities | Fair Value, Inputs, Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 242 221  
International [Member] | Fixed Income Securities | Fair Value, Inputs, Level 1 | Corporate Bonds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 158 149  
International [Member] | Fixed Income Securities | Fair Value, Inputs, Level 1 | Foreign Government Debt [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 84 72  
International [Member] | Fixed Income Securities | Fair Value, Inputs, Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 73 128  
International [Member] | Fixed Income Securities | Fair Value, Inputs, Level 2 | Corporate Bonds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 51 56  
International [Member] | Fixed Income Securities | Fair Value, Inputs, Level 2 | Foreign Government Debt [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 22 72  
International [Member] | Fixed Income Securities | Fair Value, Inputs, Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 169 93  
International [Member] | Fixed Income Securities | Fair Value, Inputs, Level 3 | Corporate Bonds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 107 93  
International [Member] | Fixed Income Securities | Fair Value, Inputs, Level 3 | Foreign Government Debt [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 62 0  
International [Member] | Other Investments [Member] | Structured Products      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 0 $ 0  
Percentage of Plan Assets 8.50% 10.90%  
Plan assets target allocation, Minimum 0.00% 0.00%  
Plan assets target allocation, Maximum 17.00% 17.00%  
International [Member] | Other Investments [Member] | Other      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets [1] $ 0 $ 49  
Percentage of Plan Assets [1] 16.70% 20.70%  
International [Member] | Other Investments [Member] | Structured Products [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets target allocation, Minimum [2] 0.00% 0.00%  
Plan assets target allocation, Maximum [2] 10.00% 10.00%  
International [Member] | Other Investments [Member] | Fair Value, Inputs, Level 1 | Structured Products      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 93 $ 111  
International [Member] | Other Investments [Member] | Fair Value, Inputs, Level 1 | Other      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets [1] 181 209  
International [Member] | Other Investments [Member] | Fair Value, Inputs, Level 2 | Structured Products      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
International [Member] | Other Investments [Member] | Fair Value, Inputs, Level 2 | Other      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets [1] 0 0  
International [Member] | Other Investments [Member] | Fair Value, Inputs, Level 3 | Structured Products      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 57 69  
International [Member] | Other Investments [Member] | Fair Value, Inputs, Level 3 | Other      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets [1] $ 175 $ 160  
[1] (
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