Variable Interest Entities - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Tax credits and other tax benefits	$ 46	$ 32	$ 94	$ 66
Investment Program, Proportional Amortization Method, Elected, Income Tax Credit and Other Income Tax Benefit, before Amortization, Statement of Income or Comprehensive Income [Extensible Enumeration]			Income tax expense	Income tax expense
Investment Program, Proportional Amortization Method, Elected, Income Tax Credit and Other Income Tax Benefit, before Amortization, Statement of Cash Flows [Extensible Enumeration]			Income tax expense	Income tax expense
Investment amortization expense	42	28	$ 84	$ 56
Investment Program, Proportional Amortization Method, Applied, Amortization Expense, Statement of Income or Comprehensive Income [Extensible Enumeration]			Income tax expense	Income tax expense
Investment Program, Proportional Amortization Method, Applied, Amortization Expense, Statement of Cash Flows [Extensible Enumeration]			Income tax expense	Income tax expense
Non-income-tax-related gains and other returns	$ 0	$ 0	$ 0	$ 0

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

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Amount of amortization expense for investment that generates income tax credit and other income tax benefit under tax credit program accounted for using proportional amortization method.

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Indicates line item in statement of cash flows that includes amortization expense for investment that generates income tax credit and other income tax benefit under tax credit program accounted for using proportional amortization method.

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Amount of income (loss) from non-income-tax-related activity and other return on investment under tax credit program accounted for using proportional amortization method, not recognized in income tax expense (benefit).

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