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Summary of Significant Accounting and Reporting Policies - Narrative (Details) $ in Millions	1 Months Ended	3 Months Ended
	Mar. 31, 2026 USD ($) jointVenture site MW	Mar. 31, 2026 USD ($) MW	Mar. 31, 2025 USD ($)	Dec. 31, 2025 USD ($)
Accounting Policies [Line Items]
Cash and Cash Equivalents, Project Level	$ 332	$ 332		$ 334
Restricted cash, current	58	58		62
Tax Credit Carryforward, Amount Sold		(8)	$ (4)
Capital Expenditures And Other Investments		25	$ 89
Property, plant and equipment – net	15,291	15,291		15,366
Assets	19,513	19,513		19,595
Investments in equity method investees	$ 615	$ 615		$ 625
Sale and Co-Investment [Line Items]
Generation facility capacity (mw) | MW	500	500
Disposal Group, Including Discontinued Operations [Line Items]
Number Of Joint Ventures | jointVenture	4
four operating sites
Disposal Group, Including Discontinued Operations [Line Items]
Number Of Operating Sites | site	4
one operating site | NEER Subsidiary
Disposal Group, Including Discontinued Operations [Line Items]
Number Of Operating Sites | site	1
Joint Venture | XPLR OpCo [Member]
Sale and Co-Investment [Line Items]
Equity Method Investment, Ownership Percentage	49.00%	49.00%
Equity Method Investment, Commitment	$ 315	$ 315
Joint Venture | NEER Subsidiary
Sale and Co-Investment [Line Items]
Equity Method Investment, Ownership Percentage	51.00%	51.00%
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Interconnection Assets and Rights
Disposal Group, Including Discontinued Operations [Line Items]
Consideration	$ 44	$ 44

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