Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Deferred tax assets
Net operating loss carryforward - U.S.	$ 2	$ 2
Net operating loss carryforward - non-U.S.	115	128
Market value difference of loan portfolio	322	0
Accruals	186	147
Tax credits	352	383
Other	164	171
Total deferred tax assets before valuation allowance	1,141	830
Less: valuation allowance	(236)	(318)
Total deferred tax assets	905	513
Deferred tax liabilities
Depreciable assets	2,354	1,827
Deferred acquisition costs	159	97
Market value difference of loan portfolio	0	32
Other	125	141
Total deferred tax liabilities	2,638	2,098
Net deferred tax liability	(1,733)	$ (1,585)
Tax Year 2037 | State
Deferred tax assets
Net operating loss carryforward - U.S.	2
Expiring Indefinitely
Deferred tax assets
Net operating loss carryforward - non-U.S.	28
Tax Year 2043
Deferred tax assets
Net operating loss carryforward - non-U.S.	87
Tax credits	$ 352