Income Taxes - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Additional Information [Line Items]
Pre-tax earnings from foreign operations	$ 230	$ 462	$ 677
Other comprehensive income (loss), provision (benefit)	455	(3,184)	(985)
Increase in valuation allowance	50
Valuation allowance	496	446
Accrued interest and penalties expense (benefit) related to income taxes included in income tax expense	1	(1)	$ (30)
Unremitted earnings	1,800
Amount of unrecognized deferred tax liability, bad debt reserve for tax purposes of qualified lender	70
Bad debt reserve for tax purposes of qualified lender	287
Foreign Tax Credit Carryforward
Additional Information [Line Items]
Increase in valuation allowance	41
Net Operating State Losses And Interest Carryforwards
Additional Information [Line Items]
Increase in valuation allowance	8
Internal Revenue Service (IRS)
Additional Information [Line Items]
Operating loss carryforwards	7	13
Operating loss carryforwards, no expiration	7
State and Local Jurisdiction
Additional Information [Line Items]
Operating loss carryforwards	273	267
Foreign Tax Authority
Additional Information [Line Items]
Operating loss carryforwards	$ 207	$ 166