Debt (Non-Recourse Debt Maturity Schedule) (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Debt Details [Line Items]
Non-Recourse Debt	$ (333)	$ (309)
Non Recourse Debt Total	22,144	$ 19,429
Construction line of credit facility remaining borrowing capacity	1,300
Other line of credit remaining borrowing capacity	1,700
Nonrecourse Debt
Debt Details [Line Items]
Long-Term Debt, Maturity, Year Two	2,232
Long-term Debt, Maturities, Repayments of Principal in Rolling Year Three	3,515
Long-Term Debt, Maturity, Year Four	2,566
Long-Term Debt, Maturity, Year Five	932
Long-term Debt, Maturities, Repayments of Principal in Rolling after Year Five	9,297
Nonrecourse Debt
Debt Details [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Rolling Twelve Months	$ 3,935