Other Assets - Tax Equity Investments under the Proportional Amortization Method (Details) - USD ($) $ in Millions	6 Months Ended
Jun. 30, 2024	Dec. 31, 2023
Equity Method Investments
Total proportional amortization method investment	$ 1,824	$ 1,699
Unfunded equity contributions	$ 637	661
Funding period	5 years
Excluded tax equity investments	$ 47
Low Income Housing
Equity Method Investments
Total proportional amortization method investment	1,790	1,699
Renewable Energy and Other
Equity Method Investments
Total proportional amortization method investment	$ 34	$ 0

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Amount of investment that generates income tax credit and other income tax benefit under tax credit program elected to be accounted for using proportional amortization method. Includes, but is not limited to, investment under program not meeting condition for accounting under proportional amortization method.

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Amount of commitment and contingent commitment, including amount of delayed equity contribution, for investment that generates income tax credit and other income tax benefit under tax credit program elected to be accounted for using proportional amortization method. Includes, but is not limited to, commitment and contingent commitment related to investment under tax credit program not meeting condition for accounting under proportional amortization method.

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