v3.26.1
Revenue from Contracts with Customers - Revenue by Category (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Disaggregation of Revenue [Line Items]        
Total revenue $ 4,048 $ 3,448 $ 7,844 $ 6,732
Total revenue        
Disaggregation of Revenue [Line Items]        
Total revenue 4,048 3,448 7,844 6,732
Total fee revenue        
Disaggregation of Revenue [Line Items]        
Total revenue 3,188 2,719 6,148 5,289
Servicing fees        
Disaggregation of Revenue [Line Items]        
Total revenue 1,468 1,304 2,877 2,579
Management fees        
Disaggregation of Revenue [Line Items]        
Total revenue 772 600 1,496 1,187
Foreign exchange trading services        
Disaggregation of Revenue [Line Items]        
Total revenue 494 393 929 730
Securities finance        
Disaggregation of Revenue [Line Items]        
Total revenue 150 126 266 240
Software services        
Disaggregation of Revenue [Line Items]        
Total revenue 166 169 335 327
Other fee revenue        
Disaggregation of Revenue [Line Items]        
Total revenue 138 127 245 226
Net interest income        
Disaggregation of Revenue [Line Items]        
Total revenue 860 729 1,695 1,443
Total other income        
Disaggregation of Revenue [Line Items]        
Total revenue     1  
Operating Segments | Investment Servicing        
Disaggregation of Revenue [Line Items]        
Total revenue 3,242 2,844 6,297 5,532
Operating Segments | Investment Servicing | Total revenue        
Disaggregation of Revenue [Line Items]        
Topic 606 revenue 1,815 1,658 3,559 3,237
All other revenue 1,427 1,186 2,738 2,295
Total revenue 3,242 2,844 6,297 5,532
Operating Segments | Investment Servicing | Total fee revenue        
Disaggregation of Revenue [Line Items]        
Topic 606 revenue 1,815 1,658 3,559 3,237
All other revenue 567 460 1,045 860
Total revenue 2,382 2,118 4,604 4,097
Operating Segments | Investment Servicing | Servicing fees        
Disaggregation of Revenue [Line Items]        
Topic 606 revenue 1,468 1,304 2,877 2,579
All other revenue 0 0 0 0
Total revenue 1,468 1,304 2,877 2,579
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
Total revenue 0 0 0 0
Operating Segments | Investment Servicing | Foreign exchange trading services        
Disaggregation of Revenue [Line Items]        
Topic 606 revenue 113 109 224 209
All other revenue 378 281 699 518
Total revenue 491 390 923 727
Operating Segments | Investment Servicing | Securities finance        
Disaggregation of Revenue [Line Items]        
Topic 606 revenue 56 52 111 98
All other revenue 84 67 139 129
Total revenue 140 119 250 227
Operating Segments | Investment Servicing | Software services        
Disaggregation of Revenue [Line Items]        
Topic 606 revenue 166 193 335 351
All other revenue 0 0 0 0
Total revenue 166 193 335 351
Operating Segments | Investment Servicing | Other fee revenue        
Disaggregation of Revenue [Line Items]        
Topic 606 revenue 12 0 12 0
All other revenue 105 112 207 213
Total revenue 117 112 219 213
Operating Segments | Investment Servicing | Net interest income        
Disaggregation of Revenue [Line Items]        
Topic 606 revenue 0 0 0 0
All other revenue 860 726 1,692 1,435
Total revenue 860 726 1,692 1,435
Operating Segments | Investment Servicing | Total other income        
Disaggregation of Revenue [Line Items]        
Topic 606 revenue     0  
All other revenue     1  
Total revenue     1  
Operating Segments | Investment Management        
Disaggregation of Revenue [Line Items]        
Total revenue 806 625 1,547 1,221
Operating Segments | Investment Management | Total revenue        
Disaggregation of Revenue [Line Items]        
Topic 606 revenue 785 600 1,512 1,187
All other revenue 21 25 35 34
Total revenue 806 625 1,547 1,221
Operating Segments | Investment Management | Total fee revenue        
Disaggregation of Revenue [Line Items]        
Topic 606 revenue 785 600 1,512 1,187
All other revenue 21 22 32 26
Total revenue 806 622 1,544 1,213
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
Total revenue 0 0 0 0
Operating Segments | Investment Management | Management fees        
Disaggregation of Revenue [Line Items]        
Topic 606 revenue 772 600 1,496 1,187
All other revenue 0 0 0 0
Total revenue 772 600 1,496 1,187
Operating Segments | Investment Management | Foreign exchange trading services        
Disaggregation of Revenue [Line Items]        
Topic 606 revenue 3 0 6 0
All other revenue 0 0 0 0
Total revenue 3 0 6 0
Operating Segments | Investment Management | Securities finance        
Disaggregation of Revenue [Line Items]        
Topic 606 revenue 10 0 10 0
All other revenue 0 7 6 13
Total revenue 10 7 16 13
Operating Segments | Investment Management | Software services        
Disaggregation of Revenue [Line Items]        
Topic 606 revenue 0 0 0 0
All other revenue 0 0 0 0
Total revenue 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 21 15 26 13
Total revenue 21 15 26 13
Operating Segments | Investment Management | Net interest income        
Disaggregation of Revenue [Line Items]        
Topic 606 revenue 0 0 0 0
All other revenue 0 3 3 8
Total revenue 0 3 3 8
Operating Segments | Investment Management | Total other income        
Disaggregation of Revenue [Line Items]        
Topic 606 revenue     0  
All other revenue     0  
Total revenue     0  
Other        
Disaggregation of Revenue [Line Items]        
Total revenue 0 (21) 0 (21)
Other | Total revenue        
Disaggregation of Revenue [Line Items]        
Topic 606 revenue 0 (24) 0 (24)
All other revenue 0 3 0 3
Total revenue 0 (21) 0 (21)
Other | Total fee revenue        
Disaggregation of Revenue [Line Items]        
Topic 606 revenue 0 (24) 0 (24)
All other revenue 0 3 0 3
Total revenue 0 (21) 0 (21)
Other | Servicing fees        
Disaggregation of Revenue [Line Items]        
Topic 606 revenue 0 0 0 0
All other revenue 0 0 0 0
Total revenue 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
Total revenue 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 3 0 3
Total revenue 0 3 0 3
Other | Securities finance        
Disaggregation of Revenue [Line Items]        
Topic 606 revenue 0 0 0 0
All other revenue 0 0 0 0
Total revenue 0 0 0 0
Other | Software services        
Disaggregation of Revenue [Line Items]        
Topic 606 revenue 0 (24) 0 (24)
All other revenue 0 0 0 0
Total revenue 0 (24) 0 (24)
Other | Other fee revenue        
Disaggregation of Revenue [Line Items]        
Topic 606 revenue 0 0 0 0
All other revenue 0 0 0 0
Total 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
Total revenue $ 0 $ 0 0 $ 0
Other | Total other income        
Disaggregation of Revenue [Line Items]        
Topic 606 revenue     0  
All other revenue     0  
Total revenue     $ 0