Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Statements of Comprehensive Income/(loss)
Net income	$ 794	$ 916	$ 912
Other comprehensive income (loss), net of tax:
Net unrealized gains (losses) on securities available for sale	54	137	(937)
Net unrealized gains (losses) on cash flow hedges	(14)	47	(129)
Net unrealized gains (losses) on pension and other postretirement plans	20	(4)	(14)
Other comprehensive income (loss)	60	180	(1,080)
Comprehensive income (loss)	854	1,096	(168)
Comprehensive income attributable to noncontrolling interest	19	19	12
Comprehensive income (loss) attributable to controlling interest	835	1,077	(180)
Income tax expense (benefit) of items included in other comprehensive income:
Net unrealized gains (losses) on securities available for sale	17	44	(302)
Net unrealized gains (losses) on cash flow hedges	(5)	15	(42)
Net unrealized gains (losses) on pension and other postretirement plans	$ 7	$ (1)	$ (5)