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Commitments, Contingencies and Guarantees (Tables) | 12 Months Ended
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Dec. 31, 2018
COMMITMENTS, CONTINGENCIES AND GUARANTEES |
Schedule of commitments |
|  | Payment Due by Period |
($ millions) |  | 2019 |  | 2020 |  | 2021 |  | 2022 |  | 2023 |  | 2024 and Beyond |  | Total |
Commitments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Product transportation and storage |  | 1 053 |  | 948 |  | 1 058 |  | 1 181 |  | 1 149 |  | 13 211 |  | 18 600 |
| Energy services |  | 139 |  | 136 |  | 173 |  | 116 |  | 118 |  | 183 |  | 865 |
| Exploration work commitments |  | 33 |  | — |  | 44 |  | — |  | — |  | 490 |  | 567 |
| Other |  | 358 |  | 283 |  | 135 |  | 75 |  | 69 |  | 195 |  | 1 115 |
Operating leases |  | 346 |  | 304 |  | 266 |  | 203 |  | 156 |  | 1 182 |  | 2 457 |
|  | 1 929 |  | 1 671 |  | 1 676 |  | 1 575 |  | 1 492 |  | 15 261 |  | 23 604 |

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