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Commitments and Contingencies - Commitments (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Leases |  |  |
2021 | $ 108 |  |
2022 | 100 |  |
2023 | 77 |  |
2024 | 63 |  |
2025 | 49 |  |
Thereafter | 304 |  |
Total | 701 |  |
Other commitments |  |  |
2021 | 312 |  |
2022 | 303 |  |
2023 | 285 |  |
2024 | 278 |  |
2025 | 252 |  |
Thereafter | 763 |  |
Total | 2,193 |  |
Total |  |  |
2021 | 420 |  |
2022 | 403 |  |
2023 | 362 |  |
2024 | 341 |  |
2025 | 301 |  |
Thereafter | 1,067 |  |
Total | 2,894 |  |
Expenses associated with agreements | $ 265 | $ 236 | $ 228
Agreements to store at facilities or transport on pipelines owned by equity method investees | Equity Method Investees |  |  |
Total |  |  |
Ownership interest in unconsolidated entity | 50.00% |  |

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