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Commitments and Contingencies (Tables) | 12 Months Ended
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Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract] |
Minimum commitments for unrecorded unconditional purchase obligations | At December 31, 2021, total minimum commitments from purchase and service obligations and transportation and storage service commitments not qualifying as leases, based on current transportation and storage rates and the foreign currency exchange rates used to convert Canadian dollars into United States dollars at December 31, 2021, were as follows (in millions):
| Total Minimum Commitments
2022 | $ | 1,335 |
2023 | 1,045 |
2024 | 823 |
2025 | 673 |
2026 | 579 |
2027 and beyond | 2,133 |
| $ | 6,588 |

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- Definition Tabular disclosure of unconditional purchase obligation not recognized as liability. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 440 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=123406679&loc=d3e25336-109308 + Details
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