Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Deferred tax assets:
Reserves not yet deducted for tax purposes	$ 5,529	$ 4,950
Employee compensation and benefits	443	343
Net operating loss and tax credit carryforwards	511	464
Capitalized developed software	995	1,084
Other	952	853
Gross deferred tax assets	8,430	7,694
Valuation allowance	(718)	(655)
Deferred tax assets after valuation allowance	7,712	7,039
Deferred tax liabilities:
Intangibles and fixed assets	733	673
Deferred interest	112	113
Other	606	579
Gross deferred tax liabilities	1,451	1,365
Net deferred tax assets	$ 6,261	$ 5,674