Debt (Non-Recourse Debt Maturity Schedule) (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Debt Details [Line Items]
Non-Recourse Debt	$ (301)	$ (333)
Non Recourse Debt Total	22,743	$ 22,144
Other line of credit remaining borrowing capacity	1,700
Nonrecourse Debt
Debt Details [Line Items]
Long-Term Debt, Maturity, Year Two	4,858
Long-term Debt, Maturities, Repayments of Principal in Rolling Year Three	3,052
Long-Term Debt, Maturity, Year Four	993
Long-Term Debt, Maturity, Year Five	1,796
Long-term Debt, Maturities, Repayments of Principal in Rolling after Year Five	9,667
Nonrecourse Debt
Debt Details [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Rolling Twelve Months	$ 2,678

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Non-recourse Debt, excluding Finance Lease Liabilities

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Amount of borrowing capacity currently available under credit facilities at subsidiaries (current borrowing capacity less the amount of borrowings outstanding) for general business use, including to support working capital, debt service reserves and other business needs excluding construction

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No definition available.

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Amount of unamortized debt discount (premium) and debt issuance costs.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the next rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing after the fifth rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the fifth rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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