Variable Interest Entities - Net Assets (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Variable Interest Entity [Line Items]
Noncontrolling interest	$ 228	$ 299
Great Valley Solar
Variable Interest Entity [Line Items]
Non-utility property, less accumulated depreciation	269	275
Other assets	40	37
Total assets	309	312
Other liabilities	19	14
Total liabilities	19	14
Accumulated depreciation	33	26
Great Valley Solar | Tax Equity Investors
Variable Interest Entity [Line Items]
Noncontrolling interest	71	84
Copper Mountain - Mesquite Solar
Variable Interest Entity [Line Items]
Non-utility property, less accumulated depreciation	420	431
Other assets	168	167
Total assets	588	598
Other liabilities	83	74
Total liabilities	83	74
Accumulated depreciation	55	44
Copper Mountain - Mesquite Solar | Tax Equity Investors
Variable Interest Entity [Line Items]
Noncontrolling interest	100	118
CED Nevada Virginia
Variable Interest Entity [Line Items]
Non-utility property, less accumulated depreciation	627	643
Other assets	61	55
Total assets	688	698
Other liabilities	325	315
Total liabilities	325	315
Noncontrolling interest	54	95
Accumulated depreciation	$ 24	$ 10