Revenue from Contracts with Customers - Disaggregation of Revenues (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Disaggregation of Revenue [Line Items]
Servicing fees	$ 1,219	$ 1,391	$ 3,884	$ 4,154
Management fees	472	526	1,482	1,523
Foreign exchange trading services	319	279	1,009	911
Securities finance	110	106	313	314
Software and processing fees	184	180	573	551
Other fee revenue	(5)	22	(19)	48
Total fee revenue	2,299	2,504	7,242	7,501
Net interest income	660	487	1,753	1,421
Total other income	0	(1)	(2)	52
Total revenue	2,959	2,990	8,993	8,974
Operating Segments | Investment Servicing
Disaggregation of Revenue [Line Items]
Topic 606 revenue	1,505	1,663	4,765	4,996
All other revenue	971	795	2,744	2,358
Servicing fees	1,219	1,391	3,884	4,154
Management fees	0	0	0	0
Foreign exchange trading services	293	266	948	869
Securities finance	105	103	300	304
Software and processing fees	184	180	573	551
Other fee revenue	12	28	46	45
Total fee revenue	1,813	1,968	5,751	5,923
Net interest income	663	491	1,760	1,432
Total other income	0	(1)	(2)	(1)
Total revenue	2,476	2,458	7,509	7,354
Operating Segments | Investment Servicing | Servicing fees
Disaggregation of Revenue [Line Items]
Topic 606 revenue	1,219	1,391	3,884	4,154
All other revenue	0	0	0	0
Servicing fees	1,219	1,391	3,884	4,154
Operating Segments | Investment Servicing | Management fees
Disaggregation of Revenue [Line Items]
Topic 606 revenue	0	0	0	0
All other revenue	0	0	0	0
Management fees	0	0	0	0
Operating Segments | Investment Servicing | Foreign exchange trading services
Disaggregation of Revenue [Line Items]
Topic 606 revenue	88	82	279	260
All other revenue	205	184	669	609
Foreign exchange trading services	293	266	948	869
Operating Segments | Investment Servicing | Securities finance
Disaggregation of Revenue [Line Items]
Topic 606 revenue	60	60	175	181
All other revenue	45	43	125	123
Securities finance	105	103	300	304
Operating Segments | Investment Servicing | Software and processing fees
Disaggregation of Revenue [Line Items]
Topic 606 revenue	138	130	427	401
All other revenue	46	50	146	150
Software and processing fees	184	180	573	551
Operating Segments | Investment Servicing | Other fee revenue
Disaggregation of Revenue [Line Items]
Topic 606 revenue	0	0	0	0
All other revenue	12	28	46	45
Other fee revenue	12	28	46	45
Operating Segments | Investment Servicing | Total fee revenue
Disaggregation of Revenue [Line Items]
Topic 606 revenue	1,505	1,663	4,765	4,996
All other revenue	308	305	986	927
Total fee revenue	1,813	1,968	5,751	5,923
Operating Segments | Investment Servicing | Net interest income
Disaggregation of Revenue [Line Items]
Topic 606 revenue	0	0	0	0
All other revenue	663	491	1,760	1,432
Net interest income	663	491	1,760	1,432
Operating Segments | Investment Servicing | Total other income
Disaggregation of Revenue [Line Items]
Topic 606 revenue	0	0	0	0
All other revenue	0	(1)	(2)	(1)
Total other income	0	(1)	(2)	(1)
Operating Segments | Investment Management
Disaggregation of Revenue [Line Items]
Topic 606 revenue	498	539	1,543	1,565
All other revenue	(15)	(7)	(59)	2
Servicing fees	0	0	0	0
Management fees	472	526	1,482	1,523
Foreign exchange trading services	26	13	61	42
Securities finance	5	3	13	10
Software and processing fees	0	0	0	0
Other fee revenue	(17)	(6)	(65)	3
Total fee revenue	486	536	1,491	1,578
Net interest income	(3)	(4)	(7)	(11)
Total other income	0	0	0	0
Total revenue	483	532	1,484	1,567
Operating Segments | Investment Management | Servicing fees
Disaggregation of Revenue [Line Items]
Topic 606 revenue	0	0	0	0
All other revenue	0	0	0	0
Servicing fees	0	0	0	0
Operating Segments | Investment Management | Management fees
Disaggregation of Revenue [Line Items]
Topic 606 revenue	472	526	1,482	1,523
All other revenue	0	0	0	0
Management fees	472	526	1,482	1,523
Operating Segments | Investment Management | Foreign exchange trading services
Disaggregation of Revenue [Line Items]
Topic 606 revenue	26	13	61	42
All other revenue	0	0	0	0
Foreign exchange trading services	26	13	61	42
Operating Segments | Investment Management | Securities finance
Disaggregation of Revenue [Line Items]
Topic 606 revenue	0	0	0	0
All other revenue	5	3	13	10
Securities finance	5	3	13	10
Operating Segments | Investment Management | Software and processing fees
Disaggregation of Revenue [Line Items]
Topic 606 revenue	0	0	0	0
All other revenue	0	0	0	0
Software and processing fees	0	0	0	0
Operating Segments | Investment Management | Other fee revenue
Disaggregation of Revenue [Line Items]
Topic 606 revenue	0	0	0	0
All other revenue	(17)	(6)	(65)	3
Other fee revenue	(17)	(6)	(65)	3
Operating Segments | Investment Management | Total fee revenue
Disaggregation of Revenue [Line Items]
Topic 606 revenue	498	539	1,543	1,565
All other revenue	(12)	(3)	(52)	13
Total fee revenue	486	536	1,491	1,578
Operating Segments | Investment Management | Net interest income
Disaggregation of Revenue [Line Items]
Topic 606 revenue	0	0	0	0
All other revenue	(3)	(4)	(7)	(11)
Net interest income	(3)	(4)	(7)	(11)
Operating Segments | Investment Management | Total other income
Disaggregation of Revenue [Line Items]
Topic 606 revenue	0	0	0	0
All other revenue	0	0	0	0
Total other income	0	0	0	0
Other
Disaggregation of Revenue [Line Items]
Topic 606 revenue	0	0	0	0
All other revenue	0	0	0	53
Servicing fees	0	0	0	0
Management fees	0	0	0	0
Foreign exchange trading services	0	0	0	0
Securities finance	0	0	0	0
Software and processing fees	0	0	0	0
Other fee revenue	0	0		0
Total fee revenue	0	0	0	0
Net interest income	0	0	0	0
Total other income	0	0	0	53
Total revenue	0	0	0	53
Other | Servicing fees
Disaggregation of Revenue [Line Items]
Topic 606 revenue	0	0	0	0
All other revenue	0	0	0	0
Servicing fees	0	0	0	0
Other | Management fees
Disaggregation of Revenue [Line Items]
Topic 606 revenue	0	0	0	0
All other revenue	0	0	0	0
Management fees	0	0	0	0
Other | Foreign exchange trading services
Disaggregation of Revenue [Line Items]
Topic 606 revenue	0	0	0	0
All other revenue	0	0	0	0
Foreign exchange trading services	0	0	0	0
Other | Securities finance
Disaggregation of Revenue [Line Items]
Topic 606 revenue	0	0	0	0
All other revenue	0	0	0	0
Securities finance	0	0	0	0
Other | Software and processing fees
Disaggregation of Revenue [Line Items]
Topic 606 revenue	0	0	0	0
All other revenue	0	0	0	0
Software and processing fees	0	0	0	0
Other | Other fee revenue
Disaggregation of Revenue [Line Items]
Topic 606 revenue	0	0	0	0
All other revenue	0	0	0	0
Other fee revenue	0	0	0	0
Other | Total fee revenue
Disaggregation of Revenue [Line Items]
Topic 606 revenue	0	0	0	0
All other revenue	0	0	0	0
Total fee revenue	0	0	0	0
Other | Net interest income
Disaggregation of Revenue [Line Items]
Topic 606 revenue	0	0	0	0
All other revenue	0	0	0	0
Net interest income	0	0	0	0
Other | Total other income
Disaggregation of Revenue [Line Items]
Topic 606 revenue	0	0	0	0
All other revenue	0	0	0	53
Total other income	$ 0	$ 0	$ 0	$ 53