CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statement of Comprehensive Income [Abstract]
Reclassification of unrealized losses on cash flow hedges from accumulated other comprehensive income (loss) to net income, tax expense (benefit)	$ (2)	$ (2)	$ (4)
Net unrealized gains (losses) on securities still held, tax expense (benefit)	(29)	(4)	4
Reclassification from accumulated other comprehensive income (loss) to net income, tax expense (benefit)	(3)	2	1
Net gain (loss) and prior service benefit (cost), tax expense (benefit)	(41)	30	11
Reclassification from accumulated other comprehensive income (loss) to net income, tax expense (benefit)	(2)	(1)	(1)
Other comprehensive income (loss) related to equity method investee, tax expense (benefit)	$ 0	$ 1	1
Impact on Disposal, Tax			$ (19)