Exit and Other Related Liabilities (Activity in Exit Liabilities) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Restructuring Reserve [Roll Forward]
Balance at beginning of period	$ 35	$ 110
Amounts recognized in expense	10	28
Costs paid or otherwise settled	(5)	(67)
Balance at end of period	40	71
Investor Services [Member]
Restructuring Reserve [Roll Forward]
Balance at beginning of period	28	86
Amounts recognized in expense	8	22
Costs paid or otherwise settled	(4)	(52)
Balance at end of period	32	56
Advisor Services [Member]
Restructuring Reserve [Roll Forward]
Balance at beginning of period	7	24
Amounts recognized in expense	2	6
Costs paid or otherwise settled	(1)	(15)
Balance at end of period	$ 8	$ 15