CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Tax expense (benefit) of unrealized gains/losses on cash flow hedges from AOCI		$ (1)	$ (1)	$ (2)
Tax expense (benefit) of unrealized gains/losses on available for sale securities still held	$ (1)	1	(3)	3
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax	1	1	1	1
Tax expense (benefit) of defined benefit pension and other benefits plans reclassified from AOCI to net income	(1)	$ (1)	(1)	(1)
Tax expense (benefit) of other comprehensive income (loss) related to equity method investees	$ 1		$ 1
Tax benefit of disposal of a business				$ (19)