Income Taxes - Tax Credit Investments Expenses and Related Income Tax Credits and Other Tax Benefits (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2024	Mar. 31, 2023
Income Tax Disclosure [Abstract]
Proportional amortization recognized in tax provision	$ 47	$ 41
Income tax credits and Other income tax benefits recognized in tax provision	$ 57	$ 52

Amount of amortization expense of investment in qualified affordable housing projects.

Reference 1: http://www.xbrl.org/2003/role/recommendedDisclosureRef
-Topic 323
-SubTopic 740
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481543/323-740-50-2

Name:	us-gaap_AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration