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Commitments (Tables)
 12 Months Ended
Dec. 31, 2022
Commitments and Contingencies Disclosure [Abstract]  
Electricity Purchase Contract Commitment The following table shows the future minimum commitments for continuing operations under these contracts as of December 31, 2022 for 2023 through 2027 and thereafter as well as actual purchases under these contracts for the years ended December 31, 2022, 2021, and 2020 (in millions):
Actual purchases during the year ended December 31,Electricity Purchase ContractsFuel Purchase ContractsOther Purchase Contracts
2020$756 $1,573 $1,506 
2021709 2,070 1,261 
20221,156 3,375 3,602 
Future commitments for the year ending December 31,
2023$1,190 $3,702 $4,642 
2024873 2,624 477 
2025639 1,706 303 
2026588 1,099 215 
2027586 1,117 189 
Thereafter5,924 3,134 1,515 
Total$9,800 $13,382 $7,341