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Employee Benefits - Cash Flows (Details) $ in Millions | Dec. 31, 2017 USD ($)
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Retirement Plans |
Information about the expected cash flows for retirement and post-retirement plans and impact of the Medicare subsidy |
2018, Net payments | $ 88
2019, Net payments | 90
2020, Net payments | 93
2021, Net payments | 96
2022, Net payments | 99
2023-2027, Net payments | 527
Postretirement Plans |
Information about the expected cash flows for retirement and post-retirement plans and impact of the Medicare subsidy |
2018, Gross payments | 9
2019, Gross payments | 8
2020, Gross payments | 8
2021, Gross payments | 7
2022, Gross payments | 6
2023-2027, Gross payments | 24
2018, Retiree Contributions | (3)
2019, Retiree Contributions | (3)
2020, Retiree Contributions | (2)
2021, Retiree Contributions | (2)
2022, Retiree Contributions | (2)
2023-2027, Retiree Contributions | (9)
2018, Medicare subsidy | 0
2019, Medicare subsidy | 0
2020, Medicare subsidy | 0
2021, Medicare subsidy | 0
2022, Medicare subsidy | 0
2023-2027, Medicare subsidy | 0
2018, Net payments | 6
2019, Net payments | 5
2020, Net payments | 6
2021, Net payments | 5
2022, Net payments | 4
2023-2027, Net payments | $ 15

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