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Revenue from Contracts with Customers - LLC (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Nonregulated | Nonregulated        
Disaggregation of Revenue [Line Items]        
Total Customer Revenue $ 855 $ 708 $ 2,215 $ 1,938