CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statements of Comprehensive Income/(loss)
Net income	$ 1,010	$ 857	$ 452
Other comprehensive income (loss), net of tax:
Net unrealized gains (losses) on securities available for sale	(144)	77	107
Net unrealized gains (losses) on cash flow hedges	(10)	9	15
Net unrealized gains (losses) on pension and other postretirement plans	6	13	15
Other comprehensive income (loss)	(148)	99	137
Comprehensive income (loss)	862	956	589
Comprehensive income attributable to noncontrolling interest	11	12	11
Comprehensive income attributable to controlling interest	851	944	578
Income tax expense (benefit) of items included in other comprehensive income:
Net unrealized gains (losses) on securities available for sale	(46)	25	35
Net unrealized gains (losses) on cash flow hedges	(3)	3	5
Net unrealized gains (losses) on pension and other postretirement plans	$ 2	$ 3	$ 5