Line of Business Information - Summary of Line of Business (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Servicing fees	$ 5,549	$ 5,167	$ 5,074
Management fees	2,053	1,880	1,824
Foreign exchange trading services	1,211	1,363	1,058
Securities finance	416	356	471
Software and processing fees	783	733	720
Total fee revenue	10,012	9,499	9,147
Net interest income	1,905	2,200	2,566
Total other income	110	4	43
Total revenue	12,027	11,703	11,756
Provision for credit losses	(33)	88	10
Total expenses	8,889	8,716	9,034
Income before income tax expense	$ 3,171	$ 2,899	$ 2,712
Pre-tax margin	26.00%	25.00%	23.00%
Average assets (in billions)	$ 299,700	$ 269,300	$ 223,300
Operating Segments
Segment Reporting Information [Line Items]
Management fees	2,053
Foreign exchange trading services	62
Securities finance	14
Software and processing fees	4
Net interest income	(14)
Operating Segments | Investment Servicing
Segment Reporting Information [Line Items]
Servicing fees	5,549	5,167	5,074
Management fees	0	0	0
Foreign exchange trading services	1,149	1,299	974
Securities finance	402	342	462
Software and processing fees	779	706	691
Total fee revenue	7,879	7,514	7,201
Net interest income	1,919	2,211	2,590
Total other income	(1)	4	43
Total revenue	9,797	9,729	9,834
Provision for credit losses	(33)	88	10
Total expenses	7,182	7,071	7,140
Income before income tax expense	$ 2,648	$ 2,570	$ 2,684
Pre-tax margin	27.00%	26.00%	27.00%
Average assets (in billions)	$ 296,500	$ 266,400	$ 220,300
Operating Segments | Investment Management
Segment Reporting Information [Line Items]
Servicing fees	0	0	0
Management fees	2,053	1,880	1,824
Foreign exchange trading services	62	64	84
Securities finance	14	14	9
Software and processing fees	4	27	29
Total fee revenue	2,133	1,985	1,946
Net interest income	(14)	(11)	(24)
Total other income	0	0	0
Total revenue	2,119	1,974	1,922
Provision for credit losses	0	0	0
Total expenses	1,445	1,471	1,535
Income before income tax expense	$ 674	$ 503	$ 387
Pre-tax margin	32.00%	25.00%	20.00%
Average assets (in billions)	$ 3,200	$ 2,900	$ 3,000
Other
Segment Reporting Information [Line Items]
Servicing fees	0	0	0
Management fees	0	0	0
Foreign exchange trading services	0	0	0
Securities finance	0	0	0
Software and processing fees	0	0	0
Total fee revenue	0	0	0
Net interest income	0	0	0
Total other income	111	0	0
Total revenue	111	0	0
Provision for credit losses	0	0	0
Total expenses	262	174	359
Income before income tax expense	$ (151)	$ (174)	$ (359)