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Commitments
 12 Months Ended
Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]  
COMMITMENTS COMMITMENTS
The Company enters into long-term contracts for construction projects, maintenance and service, transmission of electricity, operations services and purchases of electricity and fuel. In general, these contracts are subject to variable quantities or prices and are terminable only in limited circumstances. The following table shows the future minimum commitments for continuing operations under these contracts as of December 31, 2020 for 2021 through 2025 and thereafter as well as actual purchases under these contracts for the years ended December 31, 2020, 2019, and 2018 (in millions):
Actual purchases during the year ended December 31,Electricity Purchase ContractsFuel Purchase ContractsOther Purchase Contracts
2018$827 $1,838 $1,671 
20191,597 1,824 1,684 
2020756 1,573 1,506 
Future commitments for the year ending December 31,
2021$700 $1,370 $1,904 
2022500 815 636 
2023447 609 605 
2024434 495 570 
2025434 457 526 
Thereafter5,037 1,445 1,816 
Total$7,552 $5,191 $6,057