XML 56 R100.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Postretirement Benefit Plans (Summary of Plan Assets, Benefit Obligation and Funded Status) (Details) - USD ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Defined Benefit Plan Disclosure      
Fair value of plan assets $ 605 $ 567  
Projected benefit obligation (1,008) (914)  
Unfunded status of the plans (403) (347)  
Amounts recognized in the balance sheet      
Other non-current assets 58 68  
Accrued and other current liabilities (16) (15)  
Accrued postretirement benefits (445) (400)  
Net amount recognized (403) (347)  
Accumulated other comprehensive income:      
Net actuarial losses (349) (284)  
Prior service credit 4 8  
Total (345) (276)  
Pension      
Defined Benefit Plan Disclosure      
Fair value of plan assets 605 567  
Projected benefit obligation (959) (862)  
Unfunded status of the plans (354) (295)  
Amounts recognized in the balance sheet      
Other non-current assets 58 68  
Accrued and other current liabilities (13) (12)  
Accrued postretirement benefits (399) (351)  
Net amount recognized (354) (295)  
Accumulated other comprehensive income:      
Net actuarial losses (330) (260)  
Prior service credit (3) (4)  
Total (333) (264)  
Other Benefits      
Defined Benefit Plan Disclosure      
Fair value of plan assets 0 0  
Projected benefit obligation (49) (52) $ (55)
Unfunded status of the plans (49) (52)  
Amounts recognized in the balance sheet      
Other non-current assets 0 0  
Accrued and other current liabilities (3) (3)  
Accrued postretirement benefits (46) (49)  
Net amount recognized (49) (52)  
Accumulated other comprehensive income:      
Net actuarial losses (19) (24)  
Prior service credit 7 12  
Total (12) (12)  
NAV Practical Expedient      
Defined Benefit Plan Disclosure      
Fair value of plan assets 69 271  
NAV Practical Expedient | Global stock funds/securities      
Defined Benefit Plan Disclosure      
Fair value of plan assets 13 29  
NAV Practical Expedient | Index funds      
Defined Benefit Plan Disclosure      
Fair value of plan assets 0 1  
NAV Practical Expedient | Corporate bonds      
Defined Benefit Plan Disclosure      
Fair value of plan assets 5 25  
NAV Practical Expedient | Government bonds      
Defined Benefit Plan Disclosure      
Fair value of plan assets 27 20  
NAV Practical Expedient | Hedge funds      
Defined Benefit Plan Disclosure      
Fair value of plan assets 12 67  
NAV Practical Expedient | Private equity      
Defined Benefit Plan Disclosure      
Fair value of plan assets 0 6  
NAV Practical Expedient | Insurance contracts and other      
Defined Benefit Plan Disclosure      
Fair value of plan assets 3    
Estimate of Fair Value Measurement      
Defined Benefit Plan Disclosure      
Fair value of plan assets 605 567  
Estimate of Fair Value Measurement | Global stock funds/securities      
Defined Benefit Plan Disclosure      
Fair value of plan assets 103 117  
Estimate of Fair Value Measurement | Index funds      
Defined Benefit Plan Disclosure      
Fair value of plan assets 0 1  
Estimate of Fair Value Measurement | Corporate bonds      
Defined Benefit Plan Disclosure      
Fair value of plan assets 91 59  
Estimate of Fair Value Measurement | Government bonds      
Defined Benefit Plan Disclosure      
Fair value of plan assets 62 51  
Estimate of Fair Value Measurement | Hedging Instruments      
Defined Benefit Plan Disclosure      
Fair value of plan assets 39 27  
Estimate of Fair Value Measurement | Hedge funds      
Defined Benefit Plan Disclosure      
Fair value of plan assets 12 67  
Estimate of Fair Value Measurement | Private equity      
Defined Benefit Plan Disclosure      
Fair value of plan assets 0 6  
Estimate of Fair Value Measurement | Insurance contracts and other      
Defined Benefit Plan Disclosure      
Fair value of plan assets 16 186  
Estimate of Fair Value Measurement | Level 1      
Defined Benefit Plan Disclosure      
Fair value of plan assets 488 262  
Estimate of Fair Value Measurement | Level 1 | Global stock funds/securities      
Defined Benefit Plan Disclosure      
Fair value of plan assets 90 88  
Estimate of Fair Value Measurement | Level 1 | Index funds      
Defined Benefit Plan Disclosure      
Fair value of plan assets 0 0  
Estimate of Fair Value Measurement | Level 1 | Corporate bonds      
Defined Benefit Plan Disclosure      
Fair value of plan assets 86 34  
Estimate of Fair Value Measurement | Level 1 | Government bonds      
Defined Benefit Plan Disclosure      
Fair value of plan assets 35 31  
Estimate of Fair Value Measurement | Level 1 | Hedging Instruments      
Defined Benefit Plan Disclosure      
Fair value of plan assets 4 5  
Estimate of Fair Value Measurement | Level 1 | Hedge funds      
Defined Benefit Plan Disclosure      
Fair value of plan assets 0 0  
Estimate of Fair Value Measurement | Level 1 | Insurance contracts and other      
Defined Benefit Plan Disclosure      
Fair value of plan assets 104  
Estimate of Fair Value Measurement | Level 2      
Defined Benefit Plan Disclosure      
Fair value of plan assets 35 22  
Estimate of Fair Value Measurement | Level 2 | Global stock funds/securities      
Defined Benefit Plan Disclosure      
Fair value of plan assets 0 0  
Estimate of Fair Value Measurement | Level 2 | Index funds      
Defined Benefit Plan Disclosure      
Fair value of plan assets 0 0  
Estimate of Fair Value Measurement | Level 2 | Corporate bonds      
Defined Benefit Plan Disclosure      
Fair value of plan assets 0 0  
Estimate of Fair Value Measurement | Level 2 | Government bonds      
Defined Benefit Plan Disclosure      
Fair value of plan assets 0 0  
Estimate of Fair Value Measurement | Level 2 | Hedging Instruments      
Defined Benefit Plan Disclosure      
Fair value of plan assets 35 22  
Estimate of Fair Value Measurement | Level 2 | Hedge funds      
Defined Benefit Plan Disclosure      
Fair value of plan assets 0 0  
Estimate of Fair Value Measurement | Level 2 | Insurance contracts and other      
Defined Benefit Plan Disclosure      
Fair value of plan assets 0 0  
Estimate of Fair Value Measurement | Level 3      
Defined Benefit Plan Disclosure      
Fair value of plan assets 13 12  
Estimate of Fair Value Measurement | Level 3 | Global stock funds/securities      
Defined Benefit Plan Disclosure      
Fair value of plan assets 0 0  
Estimate of Fair Value Measurement | Level 3 | Index funds      
Defined Benefit Plan Disclosure      
Fair value of plan assets 0 0  
Estimate of Fair Value Measurement | Level 3 | Corporate bonds      
Defined Benefit Plan Disclosure      
Fair value of plan assets 0 0  
Estimate of Fair Value Measurement | Level 3 | Government bonds      
Defined Benefit Plan Disclosure      
Fair value of plan assets 0 0  
Estimate of Fair Value Measurement | Level 3 | Hedge funds      
Defined Benefit Plan Disclosure      
Fair value of plan assets 0 0  
Estimate of Fair Value Measurement | Level 3 | Insurance contracts and other      
Defined Benefit Plan Disclosure      
Fair value of plan assets 13 12  
Estimate of Fair Value Measurement | NAV Practical Expedient | Insurance contracts and other      
Defined Benefit Plan Disclosure      
Fair value of plan assets   70  
Equity securities | NAV Practical Expedient | Diversified Growth and Income Funds      
Defined Benefit Plan Disclosure      
Fair value of plan assets 9 51  
Equity securities | Estimate of Fair Value Measurement | Diversified Growth and Income Funds      
Defined Benefit Plan Disclosure      
Fair value of plan assets 9 51  
Fixed income | NAV Practical Expedient | Diversified Growth and Income Funds      
Defined Benefit Plan Disclosure      
Fair value of plan assets 0 2  
Fixed income | Estimate of Fair Value Measurement | Diversified Growth and Income Funds      
Defined Benefit Plan Disclosure      
Fair value of plan assets $ 0 $ 2