Federal, State and Local Taxes - Income Tax Expense (Benefit) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Federal – current	$ 188	$ (148)	$ 4
State and local – current	35	5	23
Total current	223	(143)	27
Federal – deferred	(28)	190	101
State and local – deferred	15	29
Total deferred	(13)	219	101
Income tax expense reported in net income	210	77	128
Securities available-for-sale	(42)	16	16
Pension liability adjustments	10		5
Cash flow hedge	9	(13)
Adoption of ASU 2016-13		$ (4)
Accounting Standards Update [Extensible List]		Accounting Standards Update 2016-13
Total income taxes	$ 187	$ 76	$ 149