v3.8.0.1

Employee Benefit Plans (Expected Benefit Payments for Company's Pension and Postretirement Plans as well as Expected Medicare Part D Subsidy Receipts Related to Postretirement Plan) (Details) $ in Millions | Dec. 31, 2017 USD ($)
--- | ---
Pension Benefits |
Defined Benefit Plan Disclosure [Line Items] |
2018 | $ 789
2019 | 849
2020 | 803
2021 | 827
2022 | 866
2023-2027 | 4,534
Total | 8,668
Other Postretirement Benefits |
Defined Benefit Plan Disclosure [Line Items] |
2018 | 149
2019 | 152
2020 | 154
2021 | 155
2022 | 155
2023-2027 | 766
Total | 1,531
Other Postretirement Benefits– Medicare Part D Subsidy Receipts |
Defined Benefit Plan Disclosure [Line Items] |
2018 | 10
2019 | 10
2020 | 10
2021 | 11
2022 | 11
2023-2027 | 59
Total | $ 111

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