Income Taxes (Details 2) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Deferred tax assets:
Reserves not yet deducted for tax purposes	$ 4,052	$ 3,637
Employee compensation and benefits	353	359
Net operating loss and tax credit carryforwards	411	398
Other	776	809
Gross deferred tax assets	5,592	5,203
Valuation allowance	(537)	(472)
Deferred tax assets after valuation allowance	5,055	4,731
Deferred tax liabilities:
Intangibles and fixed assets	671	1,320
Deferred revenue	126	189
Deferred interest	118	133
Investment in joint ventures	17	183
Other	618	521
Gross deferred tax liabilities	1,550	2,346
Net deferred tax assets	$ 3,505	$ 2,385