Consolidated Statements of (Loss) Income (Parenthetical) $ in Millions	12 Months Ended
	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Income Statement [Abstract]
Net unrealized gain (loss) on securities available for sale	$ (24)	$ 15	$ (223)
Net unrealized gain (loss) in pension and post-retirement obligations	(2)	6	(6)
Net unrealized gain (loss) on cash flow hedges	$ 12	$ (14)	$ 23