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Lease Liabilities Maturities (Details) - USD ($) $ in Millions | Mar. 31, 2019 | Dec. 31, 2018
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Maturity of Lease Liabilities, Operating Leases [Abstract] |  |
Remainder of 2019 | $ 42 |
2019 |  | $ 61
2020 | 56 | 53
2021 | 42 | 40
2022 | 35 | 33
2023 | 27 | 26
Thereafter | 73 | 65
Total lease payments | 275 |
Less: Interest | (27) |
Total | $ 248 | $ 278
Operating lease, Weighted-average remaining lease term (years) | 6 years 4 months 24 days |
Operating lease, Weighted-average discount rate, percent | 3.20% |
Maturity of Lease Liabilities - Finance Leases [Abstract] |  |
Remainder of 2019 | $ 11 |
2020 | 14 |
2021 | 7 |
2022 | 7 |
2023 | 7 |
Thereafter | 14 |
Total lease payments | 60 |
Less: Interest | (5) |
Total | $ 55 |
Finance lease, Weighted-average remaining lease term | 6 years 7 months 6 days |
Finance lease, Weighted-average discount rate, percent | 3.40% |

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