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Acquisitions - Narrative (Details) $ in Millions	1 Months Ended		9 Months Ended
	Jun. 30, 2023 USD ($) MW	Mar. 31, 2023 USD ($) MW	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Jul. 26, 2023 MW	Dec. 31, 2022 MW
Business Acquisition [Line Items]
Proceeds from Sale of Interest in Partnership Unit | $			$ 153	$ 136
Acquisition related costs | $			$ 3
Emerald Breeze Holdings
Business Acquisition [Line Items]
Power generation capacity		111
Generation facility capacity (mw)						1,673
Power storage capacity						65
Eight Point Wind
Business Acquisition [Line Items]
Proceeds from Sale of Interest in Partnership Unit | $		$ 92
June 2023 Acquisition
Business Acquisition [Line Items]
Power generation capacity	688
Purchase price | $	$ 566
Business Combination, Consideration Transferred, Working Capital, Cash Payment | $	32
Debt Assumed And Interest Rate Swaps | $	141
Assumption of Noncontrolling Interest | $	$ 165
Goodwill, deductible period			15 years
Montezuma II Wind
Business Acquisition [Line Items]
Wind project capacity	78
Chaves County Solar
Business Acquisition [Line Items]
Solar project capacity	70
Live Oak Solar
Business Acquisition [Line Items]
Solar project capacity	51
River Bend Solar
Business Acquisition [Line Items]
Solar project capacity	75
Casa Mesa Wind
Business Acquisition [Line Items]
Wind project capacity	51
New Mexico Wind
Business Acquisition [Line Items]
Wind project capacity	204
Langdon I
Business Acquisition [Line Items]
Wind project capacity	118
Langdon II
Business Acquisition [Line Items]
Wind project capacity	41
Yellow Pine Solar
Business Acquisition [Line Items]
Generation facility capacity (mw)					125
Power storage capacity					65
Indirect Subsidiary Of NEER | September 2022 Acquisition
Business Acquisition [Line Items]
Power storage capacity						230
Indirect Subsidiary Of NEER | Battery Storage Facility | September 2022 Acquisition
Business Acquisition [Line Items]
Ownership interests percentage						67.00%

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