Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statements of Comprehensive Income/(loss)
Net income	$ 912	$ 1,010	$ 857
Other comprehensive income (loss), net of tax:
Net unrealized gains (losses) on securities available for sale	(937)	(144)	77
Net unrealized gains (losses) on cash flow hedges	(129)	(10)	9
Net unrealized gains (losses) on pension and other postretirement plans	(14)	6	13
Other comprehensive income (loss)	(1,080)	(148)	99
Comprehensive income (loss)	(168)	862	956
Comprehensive income attributable to noncontrolling interest	12	11	12
Comprehensive income (loss) attributable to controlling interest	(180)	851	944
Income tax expense (benefit) of items included in other comprehensive income:
Net unrealized gains (losses) on securities available for sale	(302)	(46)	25
Net unrealized gains (losses) on cash flow hedges	(42)	(3)	3
Net unrealized gains (losses) on pension and other postretirement plans	$ (5)	$ 2	$ 3