Other Assets - Schedule of Proportional Amortization Investment (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Other Assets [Abstract]
Tax credits and other tax benefits from proportional amortization investments	$ 251,000,000	$ 200,000,000	$ 177,000,000
Investment amortization expense recognized as a component of income tax expense	203,000,000	157,000,000	147,000,000
Net benefit from proportional amortization investments	48,000,000	43,000,000	30,000,000
Investment program, proportional amortization method, elected, impairment loss	$ 0	$ 0	$ 0
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
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
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
Investment Program, Proportional Amortization Method, Elected, Income Tax Credit and Other Income Tax Benefit, before Amortization, Statement of Cash Flows [Extensible Enumeration]	Deferred income taxes, Increase (Decrease) in Other Operating Assets, Other liabilities	Deferred income taxes, Increase (Decrease) in Other Operating Assets, Other liabilities	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]	Deferred income taxes, Increase (Decrease) in Other Operating Assets, Other liabilities	Deferred income taxes, Increase (Decrease) in Other Operating Assets, Other liabilities	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]	Deferred income taxes, Increase (Decrease) in Other Operating Assets, Other liabilities	Deferred income taxes, Increase (Decrease) in Other Operating Assets, Other liabilities	Deferred income taxes, Increase (Decrease) in Other Operating Assets, Other liabilities