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Leases Maturity of Lease Liabilities (Details) - USD ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Total lease obligations | $ 627 | $ 845
Current operating lease liabilities | (353) | 0
Finance lease, current maturities of long-term debt | (85) |
Noncurrent operating lease liabilities | 978 | $ 0
Finance lease, long-term debt less current maturities | 542 |
Operating Lease |  |
2020 | 392 |
2021 | 257 |
2022 | 141 |
2023 | 113 |
2024 | 92 |
Thereafter | 661 |
Total lease payments | 1,656 |
Less imputed interest | (325) |
Total lease obligations | 1,331 |
Current operating lease liabilities | (353) |
Noncurrent operating lease liabilities | 978 |
Finance Lease |  |
2020 | 107 |
2021 | 102 |
2022 | 98 |
2023 | 94 |
2024 | 90 |
Thereafter | 230 |
Total lease payments | 721 |
Less imputed interest | (94) |
Total lease obligations | 627 |
Finance lease, current maturities of long-term debt | (85) |
Finance lease, long-term debt less current maturities | $ 542 |

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