Revenue from Contracts with Customers - Disaggregation of Revenues (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [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
Total revenue	12,027	11,703	11,756
Total other income	110	4	43
Operating Segments
Disaggregation of Revenue [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
Disaggregation of Revenue [Line Items]
Topic 606 revenue	6,645	6,243	6,135
All other revenue	3,152	3,486	3,699
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 revenue	9,797	9,729	9,834
Total other income	(1)	4	43
Operating Segments | Investment Servicing | Servicing fees
Disaggregation of Revenue [Line Items]
Topic 606 revenue	5,549	5,167	5,074
All other revenue	0	0	0
Servicing fees	5,549	5,167	5,074
Operating Segments | Investment Servicing | Management fees
Disaggregation of Revenue [Line Items]
Topic 606 revenue	0	0	0
All other revenue	0	0	0
Management fees	0	0	0
Operating Segments | Investment Servicing | Foreign exchange trading services
Disaggregation of Revenue [Line Items]
Topic 606 revenue	342	377	346
All other revenue	807	922	628
Foreign exchange trading services	1,149	1,299	974
Operating Segments | Investment Servicing | Securities finance
Disaggregation of Revenue [Line Items]
Topic 606 revenue	235	212	259
All other revenue	167	130	203
Securities finance	402	342	462
Operating Segments | Investment Servicing | Processing fees and other
Disaggregation of Revenue [Line Items]
Topic 606 revenue	519	487	456
All other revenue	260	219	235
Software and processing fees	779	706	691
Operating Segments | Investment Servicing | Total fee revenue
Disaggregation of Revenue [Line Items]
Topic 606 revenue	6,645	6,243	6,135
All other revenue	1,234	1,271	1,066
Total fee revenue	7,879	7,514	7,201
Operating Segments | Investment Servicing | Net interest income
Disaggregation of Revenue [Line Items]
Topic 606 revenue	0	0	0
All other revenue	1,919	2,211	2,590
Net interest income	1,919	2,211	2,590
Operating Segments | Investment Servicing | Total other income
Disaggregation of Revenue [Line Items]
Topic 606 revenue	0	0	0
All other revenue	(1)	4	43
Total other income	(1)	4	43
Operating Segments | Investment Management
Disaggregation of Revenue [Line Items]
Topic 606 revenue	2,115	1,944	1,908
All other revenue	4	30	14
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 revenue	2,119	1,974	1,922
Total other income	0	0	0
Operating Segments | Investment Management | Servicing fees
Disaggregation of Revenue [Line Items]
Topic 606 revenue	0	0	0
All other revenue	0	0	0
Servicing fees	0	0	0
Operating Segments | Investment Management | Management fees
Disaggregation of Revenue [Line Items]
Topic 606 revenue	2,053	1,880	1,824
All other revenue	0	0	0
Management fees	2,053	1,880	1,824
Operating Segments | Investment Management | Foreign exchange trading services
Disaggregation of Revenue [Line Items]
Topic 606 revenue	62	64	84
All other revenue	0	0	0
Foreign exchange trading services	62	64	84
Operating Segments | Investment Management | Securities finance
Disaggregation of Revenue [Line Items]
Topic 606 revenue	0	0	0
All other revenue	14	14	9
Securities finance	14	14	9
Operating Segments | Investment Management | Processing fees and other
Disaggregation of Revenue [Line Items]
Topic 606 revenue	0	0	0
All other revenue	4	27	29
Software and processing fees	4	27	29
Operating Segments | Investment Management | Total fee revenue
Disaggregation of Revenue [Line Items]
Topic 606 revenue	2,115	1,944	1,908
All other revenue	18	41	38
Total fee revenue	2,133	1,985	1,946
Operating Segments | Investment Management | Net interest income
Disaggregation of Revenue [Line Items]
Topic 606 revenue	0	0	0
All other revenue	(14)	(11)	(24)
Net interest income	(14)	(11)	(24)
Operating Segments | Investment Management | Total other income
Disaggregation of Revenue [Line Items]
Topic 606 revenue	0	0	0
All other revenue	0	0	0
Total other income	0	0	0
Other
Disaggregation of Revenue [Line Items]
Topic 606 revenue	0	0	0
All other revenue	111	0	0
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 revenue	111	0	0
Total other income	111	0	0
Other | Servicing fees
Disaggregation of Revenue [Line Items]
Topic 606 revenue	0	0	0
All other revenue	0	0	0
Servicing fees	0	0	0
Other | Management fees
Disaggregation of Revenue [Line Items]
Topic 606 revenue	0	0	0
All other revenue	0	0	0
Management fees	0	0	0
Other | Foreign exchange trading services
Disaggregation of Revenue [Line Items]
Topic 606 revenue	0	0	0
All other revenue	0	0	0
Foreign exchange trading services	0	0	0
Other | Securities finance
Disaggregation of Revenue [Line Items]
Topic 606 revenue	0	0	0
All other revenue	0	0	0
Securities finance	0	0	0
Other | Processing fees and other
Disaggregation of Revenue [Line Items]
Topic 606 revenue	0	0	0
All other revenue	0	0	0
Software and processing fees	0	0	0
Other | Total fee revenue
Disaggregation of Revenue [Line Items]
Topic 606 revenue	0	0	0
All other revenue	0	0	0
Total fee revenue	0	0	0
Other | Net interest income
Disaggregation of Revenue [Line Items]
Topic 606 revenue	0	0	0
All other revenue	0	0	0
Net interest income	0	0	0
Other | Total other income
Disaggregation of Revenue [Line Items]
Topic 606 revenue	0	0	0
All other revenue	111	0	0
Total other income	$ 111	$ 0	$ 0