CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statements of Comprehensive Income/(loss)
Net income	$ 857	$ 452	$ 557
Other comprehensive income (loss), net of tax:
Net unrealized gains (losses) on securities available for sale	77	107	(49)
Net unrealized gains (losses) on cash flow hedges	9	15	(4)
Net unrealized gains (losses) on pension and other postretirement plans	13	15	0
Other comprehensive income (loss)	99	137	(53)
Comprehensive income	956	589	504
Comprehensive income attributable to noncontrolling interest	12	11	12
Comprehensive income attributable to controlling interest	944	578	492
Income tax expense (benefit) of items included in Other comprehensive income:
Net unrealized gains (losses) on securities available for sale	25	35	(16)
Net unrealized gains (losses) on cash flow hedges	3	5	(1)
Net unrealized gains (losses) on pension and other postretirement plans	$ 3	$ 5	$ 0