Variable Interest Entities - Net Assets (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Variable Interest Entity [Line Items]
Noncontrolling interest	$ 234	$ 299
Great Valley Solar
Variable Interest Entity [Line Items]
Non-utility property, less accumulated depreciation	271	275
Other assets	41	37
Total assets	312	312
Other liabilities	17	14
Total liabilities	17	14
Accumulated depreciation	31	26
Great Valley Solar | Tax Equity Investors
Variable Interest Entity [Line Items]
Noncontrolling interest	76	84
Copper Mountain - Mesquite Solar
Variable Interest Entity [Line Items]
Non-utility property, less accumulated depreciation	424	431
Other assets	170	167
Total assets	594	598
Other liabilities	80	74
Total liabilities	80	74
Accumulated depreciation	51	44
Copper Mountain - Mesquite Solar | Tax Equity Investors
Variable Interest Entity [Line Items]
Noncontrolling interest	106	118
CED Nevada Virginia
Variable Interest Entity [Line Items]
Non-utility property, less accumulated depreciation	632	643
Other assets	59	55
Total assets	691	698
Other liabilities	326	315
Total liabilities	326	315
Noncontrolling interest	50	95
Accumulated depreciation	$ 20	$ 10