Other Assets - Schedule of Proportional Amortization Investment (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Other Assets [Abstract]
Tax credits and other tax benefits from proportional amortization investments	$ 102,000,000	$ 70,000,000	$ 158,000,000	$ 109,000,000
Investment amortization expense recognized as a component of income tax expense	80,000,000	56,000,000	125,000,000	88,000,000
Net benefit from proportional amortization investments	$ 22,000,000	$ 14,000,000	$ 33,000,000	$ 21,000,000
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 from continuing operations	Income tax expense from continuing operations	Income tax expense from continuing operations	Income tax expense from continuing operations
Investment Program, Proportional Amortization Method, Elected, Income Tax Credit and Other Income Tax Benefit, after Amortization, Statement of Income or Comprehensive Income [Extensible Enumeration]	Income tax expense from continuing operations	Income tax expense from continuing operations	Income tax expense from continuing operations	Income tax expense from continuing operations
Investment Program, Proportional Amortization Method, Applied, Amortization Expense, Statement of Income or Comprehensive Income [Extensible Enumeration]	Income tax expense from continuing operations	Income tax expense from continuing operations	Income tax expense from continuing operations	Income tax expense from continuing operations
Investment Program, Proportional Amortization Method, Elected, Income Tax Credit and Other Income Tax Benefit, before Amortization, Statement of Cash Flows [Extensible Enumeration]	Increase (Decrease) in Deferred Income Taxes, Increase (Decrease) in Other Operating Assets, Other liabilities	Increase (Decrease) in Deferred Income Taxes, Increase (Decrease) in Other Operating Assets, Other liabilities	Increase (Decrease) in Deferred Income Taxes, Increase (Decrease) in Other Operating Assets, Other liabilities	Increase (Decrease) in Deferred Income Taxes, Increase (Decrease) in Other Operating Assets, Other liabilities
Investment Program, Proportional Amortization Method, Applied, Amortization Expense, Statement of Cash Flows [Extensible Enumeration]	Increase (Decrease) in Deferred Income Taxes, Increase (Decrease) in Other Operating Assets, Other liabilities	Increase (Decrease) in Deferred Income Taxes, Increase (Decrease) in Other Operating Assets, Other liabilities	Increase (Decrease) in Deferred Income Taxes, Increase (Decrease) in Other Operating Assets, Other liabilities	Increase (Decrease) in Deferred Income Taxes, Increase (Decrease) in Other Operating Assets, Other liabilities
Investment Program, Proportional Amortization Method, Elected, Income Tax Credit and Other Income Tax Benefit, after Amortization, Statement of Cash Flows [Extensible Enumeration]	Increase (Decrease) in Deferred Income Taxes, Increase (Decrease) in Other Operating Assets, Other liabilities	Increase (Decrease) in Deferred Income Taxes, Increase (Decrease) in Other Operating Assets, Other liabilities	Increase (Decrease) in Deferred Income Taxes, Increase (Decrease) in Other Operating Assets, Other liabilities	Increase (Decrease) in Deferred Income Taxes, Increase (Decrease) in Other Operating Assets, Other liabilities
Investment program, proportional amortization method, elected, impairment loss	$ 0	$ 0	$ 0	$ 0