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Employee Benefit Plans - Schedule of Future Expected Benefit Payments (Details) $ in Millions | Dec. 31, 2018 USD ($)
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Pension Benefits |
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract] |
2019 | $ 192
2020 | 186
2021 | 185
2022 | 183
2023 | 180
2024-2028 | 886
Total | 1,812
Post-retirement Benefits |
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract] |
2019 | 34
2020 | 13
2021 | 11
2022 | 10
2023 | 9
2024-2028 | 32
Total | $ 109

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