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Loans and Leases - Schedule of Loans Disaggregated by Year of Origination and by Risk Rating (Details) - USD ($)
$ in Millions
Jun. 30, 2023
Dec. 31, 2022
Jun. 30, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases $ 133,015 $ 70,781 $ 67,735
Current      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 131,895 69,917  
30-59 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 349 480  
60-89 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 243 214  
90 Days or Greater      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 528 170  
Commercial      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 8,234 15,142  
2022 12,782 10,760  
2021 9,997 8,245  
2020 7,510 5,860  
2019 5,152 3,101  
2018 & Prior 6,278 4,449  
Revolving 6,211 5,868  
Revolving Converted to Term Loans 5 30  
Total loans and leases 56,169 53,455  
Commercial | Current      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 55,408 52,770  
Commercial | 30-59 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 174 387  
Commercial | 60-89 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 190 192  
Commercial | 90 Days or Greater      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 397 106  
Commercial | Commercial construction      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 370 1,146  
2022 1,320 759  
2021 789 529  
2020 423 221  
2019 130 27  
2018 & Prior 65 80  
Revolving 85 42  
Revolving Converted to Term Loans 0 0  
Total loans and leases 3,182 2,804  
Commercial | Commercial construction | Current      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 3,172 2,753  
Commercial | Commercial construction | 30-59 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 0 50  
Commercial | Commercial construction | 60-89 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 9 0  
Commercial | Commercial construction | 90 Days or Greater      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 1 1  
Commercial | Commercial construction | Pass      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 369 1,140  
2022 1,260 759  
2021 775 511  
2020 374 157  
2019 99 27  
2018 & Prior 60 75  
Revolving 85 42  
Revolving Converted to Term Loans 0 0  
Total loans and leases 3,022 2,711  
Commercial | Commercial construction | Special Mention      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 0 4  
2022 58 0  
2021 0 18  
2020 49 18  
2019 30 0  
2018 & Prior 0 0  
Revolving 0 0  
Revolving Converted to Term Loans 0 0  
Total loans and leases 137 40  
Commercial | Commercial construction | Substandard      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 1 2  
2022 2 0  
2021 14 0  
2020 0 43  
2019 1 0  
2018 & Prior 5 5  
Revolving 0 0  
Revolving Converted to Term Loans 0 0  
Total loans and leases 23 50  
Commercial | Commercial construction | Doubtful      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 0 0  
2022 0 0  
2021 0 0  
2020 0 3  
2019 0 0  
2018 & Prior 0 0  
Revolving 0 0  
Revolving Converted to Term Loans 0 0  
Total loans and leases 0 3  
Commercial | Commercial construction | Ungraded      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 0 0  
2022 0 0  
2021 0 0  
2020 0 0  
2019 0 0  
2018 & Prior 0 0  
Revolving 0 0  
Revolving Converted to Term Loans 0 0  
Total loans and leases 0 0  
Commercial | Owner occupied commercial mortgage      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 994 2,830  
2022 2,824 3,389  
2021 3,332 3,039  
2020 2,903 1,886  
2019 1,763 1,113  
2018 & Prior 2,751 2,031  
Revolving 181 185  
Revolving Converted to Term Loans 0 0  
Total loans and leases 14,748 14,473  
Commercial | Owner occupied commercial mortgage | Current      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 14,680 14,414  
Commercial | Owner occupied commercial mortgage | 30-59 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 20 29  
Commercial | Owner occupied commercial mortgage | 60-89 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 9 5  
Commercial | Owner occupied commercial mortgage | 90 Days or Greater      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 39 25  
Commercial | Owner occupied commercial mortgage | Pass      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 981 2,773  
2022 2,740 3,328  
2021 3,221 2,966  
2020 2,808 1,825  
2019 1,699 1,048  
2018 & Prior 2,497 1,867  
Revolving 167 177  
Revolving Converted to Term Loans 0 0  
Total loans and leases 14,113 13,984  
Commercial | Owner occupied commercial mortgage | Special Mention      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 7 33  
2022 49 14  
2021 13 32  
2020 25 33  
2019 21 18  
2018 & Prior 69 49  
Revolving 8 2  
Revolving Converted to Term Loans 0 0  
Total loans and leases 192 181  
Commercial | Owner occupied commercial mortgage | Substandard      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 6 24  
2022 35 47  
2021 98 41  
2020 70 28  
2019 43 47  
2018 & Prior 185 114  
Revolving 6 6  
Revolving Converted to Term Loans 0 0  
Total loans and leases 443 307  
Commercial | Owner occupied commercial mortgage | Doubtful      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 0 0  
2022 0 0  
2021 0 0  
2020 0 0  
2019 0 0  
2018 & Prior 0 1  
Revolving 0 0  
Revolving Converted to Term Loans 0 0  
Total loans and leases 0 1  
Commercial | Owner occupied commercial mortgage | Ungraded      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 0 0  
2022 0 0  
2021 0 0  
2020 0 0  
2019 0 0  
2018 & Prior 0 0  
Revolving 0 0  
Revolving Converted to Term Loans 0 0  
Total loans and leases 0 0  
Commercial | Non-owner occupied commercial mortgage      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 1,190 2,504  
2022 2,577 1,670  
2021 1,672 1,931  
2020 1,856 1,776  
2019 1,658 773  
2018 & Prior 1,733 1,199  
Revolving 47 49  
Revolving Converted to Term Loans 0 0  
Total loans and leases 10,733 9,902  
Commercial | Non-owner occupied commercial mortgage | Current      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 10,320 9,671  
Commercial | Non-owner occupied commercial mortgage | 30-59 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 38 76  
Commercial | Non-owner occupied commercial mortgage | 60-89 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 115 144  
Commercial | Non-owner occupied commercial mortgage | 90 Days or Greater      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 260 11  
Commercial | Non-owner occupied commercial mortgage | Pass      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 1,182 2,501  
2022 2,575 1,658  
2021 1,660 1,794  
2020 1,669 1,397  
2019 1,119 680  
2018 & Prior 1,349 933  
Revolving 47 48  
Revolving Converted to Term Loans 0 0  
Total loans and leases 9,601 9,011  
Commercial | Non-owner occupied commercial mortgage | Special Mention      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 7 0  
2022 0 1  
2021 0 69  
2020 95 38  
2019 111 35  
2018 & Prior 74 10  
Revolving 0 1  
Revolving Converted to Term Loans 0 0  
Total loans and leases 287 154  
Commercial | Non-owner occupied commercial mortgage | Substandard      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 1 3  
2022 2 11  
2021 12 68  
2020 92 324  
2019 382 58  
2018 & Prior 301 236  
Revolving 0 0  
Revolving Converted to Term Loans 0 0  
Total loans and leases 790 700  
Commercial | Non-owner occupied commercial mortgage | Doubtful      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 0 0  
2022 0 0  
2021 0 0  
2020 0 17  
2019 46 0  
2018 & Prior 9 20  
Revolving 0 0  
Revolving Converted to Term Loans 0 0  
Total loans and leases 55 37  
Commercial | Non-owner occupied commercial mortgage | Ungraded      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 0 0  
2022 0 0  
2021 0 0  
2020 0 0  
2019 0 0  
2018 & Prior 0 0  
Revolving 0 0  
Revolving Converted to Term Loans 0 0  
Total loans and leases 0 0  
Commercial | Commercial and industrial      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 5,241 7,889  
2022 5,405 4,419  
2021 3,776 2,311  
2020 2,002 1,739  
2019 1,439 1,096  
2018 & Prior 1,610 1,029  
Revolving 5,898 5,592  
Revolving Converted to Term Loans 5 30  
Total loans and leases 25,376 24,105  
Commercial | Commercial and industrial | Current      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 25,171 23,853  
Commercial | Commercial and industrial | 30-59 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 84 173  
Commercial | Commercial and industrial | 60-89 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 38 26  
Commercial | Commercial and industrial | 90 Days or Greater      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 83 53  
Commercial | Commercial and industrial | Pass      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 5,139 7,695  
2022 5,141 4,145  
2021 3,512 2,035  
2020 1,706 1,533  
2019 1,233 872  
2018 & Prior 1,285 845  
Revolving 5,421 5,252  
Revolving Converted to Term Loans 4 29  
Total loans and leases 23,441 22,406  
Commercial | Commercial and industrial | Special Mention      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 58 87  
2022 114 153  
2021 135 79  
2020 91 63  
2019 52 52  
2018 & Prior 40 23  
Revolving 110 40  
Revolving Converted to Term Loans 0 0  
Total loans and leases 600 497  
Commercial | Commercial and industrial | Substandard      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 44 106  
2022 142 117  
2021 123 194  
2020 204 132  
2019 131 166  
2018 & Prior 261 145  
Revolving 232 200  
Revolving Converted to Term Loans 1 1  
Total loans and leases 1,138 1,061  
Commercial | Commercial and industrial | Doubtful      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 0 1  
2022 8 4  
2021 6 3  
2020 1 11  
2019 23 6  
2018 & Prior 24 16  
Revolving 20 7  
Revolving Converted to Term Loans 0 0  
Total loans and leases 82 48  
Commercial | Commercial and industrial | Ungraded      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 0 0  
2022 0 0  
2021 0 0  
2020 0 0  
2019 0 0  
2018 & Prior 0 0  
Revolving 115 93  
Revolving Converted to Term Loans 0 0  
Total loans and leases 115 93  
Commercial | Leases      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 439 773  
2022 656 523  
2021 428 435  
2020 326 238  
2019 162 92  
2018 & Prior 119 110  
Revolving 0 0  
Revolving Converted to Term Loans 0 0  
Total loans and leases 2,130 2,171  
Commercial | Leases | Current      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 2,065 2,079  
Commercial | Leases | 30-59 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 32 59  
Commercial | Leases | 60-89 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 19 17  
Commercial | Leases | 90 Days or Greater      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 14 16  
Commercial | Leases | Pass      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 415 718  
2022 595 466  
2021 387 389  
2020 292 216  
2019 146 80  
2018 & Prior 105 108  
Revolving 0 0  
Revolving Converted to Term Loans 0 0  
Total loans and leases 1,940 1,977  
Commercial | Leases | Special Mention      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 10 21  
2022 23 22  
2021 12 17  
2020 10 9  
2019 6 4  
2018 & Prior 2 0  
Revolving 0 0  
Revolving Converted to Term Loans 0 0  
Total loans and leases 63 73  
Commercial | Leases | Substandard      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 14 32  
2022 34 32  
2021 26 27  
2020 22 12  
2019 9 7  
2018 & Prior 11 1  
Revolving 0 0  
Revolving Converted to Term Loans 0 0  
Total loans and leases 116 111  
Commercial | Leases | Doubtful      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 0 2  
2022 4 3  
2021 3 2  
2020 2 1  
2019 1 1  
2018 & Prior 1 0  
Revolving 0 0  
Revolving Converted to Term Loans 0 0  
Total loans and leases 11 9  
Commercial | Leases | Ungraded      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 0 0  
2022 0 0  
2021 0 0  
2020 0 0  
2019 0 0  
2018 & Prior 0 1  
Revolving 0 0  
Revolving Converted to Term Loans 0 0  
Total loans and leases 0 1  
Consumer      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 1,575 4,249  
2022 4,176 4,214  
2021 4,024 2,337  
2020 2,177 930  
2019 834 481  
2018 & Prior 3,000 2,775  
Revolving 2,167 2,240  
Revolving Converted to Term Loans 94 100  
Total loans and leases 18,047 17,326  
Consumer | Current      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 17,827 17,147  
Consumer | 30-59 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 136 93  
Consumer | 60-89 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 26 22  
Consumer | 90 Days or Greater      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 58 64  
Consumer | Residential mortgage      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 1,224 3,489  
2022 3,531 3,730  
2021 3,632 2,106  
2020 1,995 812  
2019 747 419  
2018 & Prior 2,928 2,731  
Revolving 8 22  
Revolving Converted to Term Loans 0 0  
Total loans and leases 14,065 13,309  
Consumer | Residential mortgage | Current      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 1,221 3,485  
2022 3,513 3,721  
2021 3,615 2,097  
2020 1,984 805  
2019 740 413  
2018 & Prior 2,804 2,625  
Revolving 8 22  
Revolving Converted to Term Loans 0 0  
Total loans and leases 13,885 13,168  
Consumer | Residential mortgage | 30-59 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 3 3  
2022 15 7  
2021 11 6  
2020 7 5  
2019 6 3  
2018 & Prior 71 49  
Revolving 0 0  
Revolving Converted to Term Loans 0 0  
Total loans and leases 113 73  
Consumer | Residential mortgage | 60-89 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 0 1  
2022 2 1  
2021 5 2  
2020 2 0  
2019 1 1  
2018 & Prior 11 11  
Revolving 0 0  
Revolving Converted to Term Loans 0 0  
Total loans and leases 21 16  
Consumer | Residential mortgage | 90 Days or Greater      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 0 0  
2022 1 1  
2021 1 1  
2020 2 2  
2019 0 2  
2018 & Prior 42 46  
Revolving 0 0  
Revolving Converted to Term Loans 0 0  
Total loans and leases 46 52  
Consumer | Revolving mortgage      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 0 0  
2022 0 0  
2021 0 0  
2020 0 0  
2019 0 0  
2018 & Prior 0 0  
Revolving 1,806 1,851  
Revolving Converted to Term Loans 94 100  
Total loans and leases 1,900 1,951  
Consumer | Revolving mortgage | Current      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 0 0  
2022 0 0  
2021 0 0  
2020 0 0  
2019 0 0  
2018 & Prior 0 0  
Revolving 1,792 1,839  
Revolving Converted to Term Loans 86 92  
Total loans and leases 1,878 1,931  
Consumer | Revolving mortgage | 30-59 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 0 0  
2022 0 0  
2021 0 0  
2020 0 0  
2019 0 0  
2018 & Prior 0 0  
Revolving 9 5  
Revolving Converted to Term Loans 3 4  
Total loans and leases 12 9  
Consumer | Revolving mortgage | 60-89 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 0 0  
2022 0 0  
2021 0 0  
2020 0 0  
2019 0 0  
2018 & Prior 0 0  
Revolving 1 2  
Revolving Converted to Term Loans 1 1  
Total loans and leases 2 3  
Consumer | Revolving mortgage | 90 Days or Greater      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 0 0  
2022 0 0  
2021 0 0  
2020 0 0  
2019 0 0  
2018 & Prior 0 0  
Revolving 4 5  
Revolving Converted to Term Loans 4 3  
Total loans and leases 8 8  
Consumer | Consumer auto      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 277 600  
2022 517 402  
2021 327 218  
2020 172 112  
2019 82 60  
2018 & Prior 50 22  
Revolving 0 0  
Revolving Converted to Term Loans 0 0  
Total loans and leases 1,425 1,414  
Consumer | Consumer auto | Current      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 276 599  
2022 514 398  
2021 324 216  
2020 171 111  
2019 81 59  
2018 & Prior 49 22  
Revolving 0 0  
Revolving Converted to Term Loans 0 0  
Total loans and leases 1,415 1,405  
Consumer | Consumer auto | 30-59 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 1 1  
2022 2 2  
2021 2 2  
2020 1 1  
2019 1 1  
2018 & Prior 1 0  
Revolving 0 0  
Revolving Converted to Term Loans 0 0  
Total loans and leases 8 7  
Consumer | Consumer auto | 60-89 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 0 0  
2022 0 1  
2021 1 0  
2020 0 0  
2019 0 0  
2018 & Prior 0 0  
Revolving 0 0  
Revolving Converted to Term Loans 0 0  
Total loans and leases 1 1  
Consumer | Consumer auto | 90 Days or Greater      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 0 0  
2022 1 1  
2021 0 0  
2020 0 0  
2019 0 0  
2018 & Prior 0 0  
Revolving 0 0  
Revolving Converted to Term Loans 0 0  
Total loans and leases 1 1  
Consumer | Consumer other      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 74 160  
2022 128 82  
2021 65 13  
2020 10 6  
2019 5 2  
2018 & Prior 22 22  
Revolving 353 367  
Revolving Converted to Term Loans 0 0  
Total loans and leases 657 652  
Consumer | Consumer other | Current      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 74 160  
2022 128 82  
2021 65 13  
2020 10 6  
2019 5 2  
2018 & Prior 19 19  
Revolving 348 361  
Revolving Converted to Term Loans 0 0  
Total loans and leases 649 643  
Consumer | Consumer other | 30-59 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 0 0  
2022 0 0  
2021 0 0  
2020 0 0  
2019 0 0  
2018 & Prior 1 1  
Revolving 2 3  
Revolving Converted to Term Loans 0 0  
Total loans and leases 3 4  
Consumer | Consumer other | 60-89 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 0 0  
2022 0 0  
2021 0 0  
2020 0 0  
2019 0 0  
2018 & Prior 1 1  
Revolving 1 1  
Revolving Converted to Term Loans 0 0  
Total loans and leases 2 2  
Consumer | Consumer other | 90 Days or Greater      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 0 0  
2022 0 0  
2021 0 0  
2020 0 0  
2019 0 0  
2018 & Prior 1 1  
Revolving 2 2  
Revolving Converted to Term Loans 0 0  
Total loans and leases 3 3  
SVB      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 2,041    
2022 7,615    
2021 5,863    
2020 3,973    
2019 2,084    
2018 & Prior 3,546    
Revolving 33,552    
Revolving Converted to Term Loans 125    
Total loans and leases 58,799 0  
SVB | Current      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 58,660    
SVB | 30-59 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 39    
SVB | 60-89 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 27    
SVB | 90 Days or Greater      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 73    
SVB | Global fund banking      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 168    
2022 180    
2021 129    
2020 96    
2019 42    
2018 & Prior 8    
Revolving 28,671    
Revolving Converted to Term Loans 39    
Total loans and leases 29,333 0  
SVB | Global fund banking | Current      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 29,327    
SVB | Global fund banking | 30-59 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 6    
SVB | Global fund banking | 60-89 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 0    
SVB | Global fund banking | 90 Days or Greater      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 0    
SVB | Global fund banking | Pass      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 168    
2022 180    
2021 129    
2020 96    
2019 42    
2018 & Prior 8    
Revolving 28,646    
Revolving Converted to Term Loans 39    
Total loans and leases 29,308    
SVB | Global fund banking | Special Mention      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 0    
2022 0    
2021 0    
2020 0    
2019 0    
2018 & Prior 0    
Revolving 14    
Revolving Converted to Term Loans 0    
Total loans and leases 14    
SVB | Global fund banking | Substandard      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 0    
2022 0    
2021 0    
2020 0    
2019 0    
2018 & Prior 0    
Revolving 11    
Revolving Converted to Term Loans 0    
Total loans and leases 11    
SVB | Global fund banking | Doubtful      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 0    
2022 0    
2021 0    
2020 0    
2019 0    
2018 & Prior 0    
Revolving 0    
Revolving Converted to Term Loans 0    
Total loans and leases 0    
SVB | Global fund banking | Ungraded      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 0    
2022 0    
2021 0    
2020 0    
2019 0    
2018 & Prior 0    
Revolving 0    
Revolving Converted to Term Loans 0    
Total loans and leases 0    
SVB | Investor dependent - early stage      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 118    
2022 979    
2021 386    
2020 104    
2019 40    
2018 & Prior 8    
Revolving 203    
Revolving Converted to Term Loans 2    
Total loans and leases 1,840 0  
SVB | Investor dependent - early stage | Current      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 1,813    
SVB | Investor dependent - early stage | 30-59 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 3    
SVB | Investor dependent - early stage | 60-89 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 3    
SVB | Investor dependent - early stage | 90 Days or Greater      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 21    
SVB | Investor dependent - early stage | Pass      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 115    
2022 893    
2021 298    
2020 83    
2019 33    
2018 & Prior 6    
Revolving 142    
Revolving Converted to Term Loans 2    
Total loans and leases 1,572    
SVB | Investor dependent - early stage | Special Mention      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 2    
2022 1    
2021 0    
2020 0    
2019 0    
2018 & Prior 0    
Revolving 0    
Revolving Converted to Term Loans 0    
Total loans and leases 3    
SVB | Investor dependent - early stage | Substandard      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 1    
2022 69    
2021 85    
2020 19    
2019 7    
2018 & Prior 2    
Revolving 55    
Revolving Converted to Term Loans 0    
Total loans and leases 238    
SVB | Investor dependent - early stage | Doubtful      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 0    
2022 16    
2021 3    
2020 2    
2019 0    
2018 & Prior 0    
Revolving 6    
Revolving Converted to Term Loans 0    
Total loans and leases 27    
SVB | Investor dependent - early stage | Ungraded      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 0    
2022 0    
2021 0    
2020 0    
2019 0    
2018 & Prior 0    
Revolving 0    
Revolving Converted to Term Loans 0    
Total loans and leases 0    
SVB | Investor dependent - growth stage      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 338    
2022 1,393    
2021 1,177    
2020 567    
2019 135    
2018 & Prior 171    
Revolving 266    
Revolving Converted to Term Loans 5    
Total loans and leases 4,052 0  
SVB | Investor dependent - growth stage | Current      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 4,032    
SVB | Investor dependent - growth stage | 30-59 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 0    
SVB | Investor dependent - growth stage | 60-89 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 8    
SVB | Investor dependent - growth stage | 90 Days or Greater      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 12    
SVB | Investor dependent - growth stage | Pass      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 333    
2022 1,219    
2021 988    
2020 460    
2019 119    
2018 & Prior 145    
Revolving 233    
Revolving Converted to Term Loans 5    
Total loans and leases 3,502    
SVB | Investor dependent - growth stage | Special Mention      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 0    
2022 19    
2021 55    
2020 19    
2019 0    
2018 & Prior 1    
Revolving 0    
Revolving Converted to Term Loans 0    
Total loans and leases 94    
SVB | Investor dependent - growth stage | Substandard      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 5    
2022 119    
2021 100    
2020 78    
2019 8    
2018 & Prior 19    
Revolving 28    
Revolving Converted to Term Loans 0    
Total loans and leases 357    
SVB | Investor dependent - growth stage | Doubtful      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 0    
2022 36    
2021 34    
2020 10    
2019 8    
2018 & Prior 6    
Revolving 5    
Revolving Converted to Term Loans 0    
Total loans and leases 99    
SVB | Investor dependent - growth stage | Ungraded      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 0    
2022 0    
2021 0    
2020 0    
2019 0    
2018 & Prior 0    
Revolving 0    
Revolving Converted to Term Loans 0    
Total loans and leases 0    
SVB | Innovation C&I and cash flow dependent      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 453    
2022 1,722    
2021 1,265    
2020 1,254    
2019 632    
2018 & Prior 566    
Revolving 3,013    
Revolving Converted to Term Loans 0    
Total loans and leases 8,905 0  
SVB | Innovation C&I and cash flow dependent | Current      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 8,869    
SVB | Innovation C&I and cash flow dependent | 30-59 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 15    
SVB | Innovation C&I and cash flow dependent | 60-89 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 2    
SVB | Innovation C&I and cash flow dependent | 90 Days or Greater      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 19    
SVB | Innovation C&I and cash flow dependent | Pass      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 406    
2022 1,527    
2021 1,112    
2020 1,123    
2019 594    
2018 & Prior 479    
Revolving 2,682    
Revolving Converted to Term Loans 0    
Total loans and leases 7,923    
SVB | Innovation C&I and cash flow dependent | Special Mention      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 0    
2022 85    
2021 37    
2020 0    
2019 27    
2018 & Prior 49    
Revolving 72    
Revolving Converted to Term Loans 0    
Total loans and leases 270    
SVB | Innovation C&I and cash flow dependent | Substandard      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 47    
2022 110    
2021 115    
2020 114    
2019 11    
2018 & Prior 38    
Revolving 234    
Revolving Converted to Term Loans 0    
Total loans and leases 669    
SVB | Innovation C&I and cash flow dependent | Doubtful      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 0    
2022 0    
2021 1    
2020 17    
2019 0    
2018 & Prior 0    
Revolving 25    
Revolving Converted to Term Loans 0    
Total loans and leases 43    
SVB | Innovation C&I and cash flow dependent | Ungraded      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 0    
2022 0    
2021 0    
2020 0    
2019 0    
2018 & Prior 0    
Revolving 0    
Revolving Converted to Term Loans 0    
Total loans and leases 0    
SVB | Private Bank      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 696    
2022 2,300    
2021 2,207    
2020 1,412    
2019 792    
2018 & Prior 1,255    
Revolving 909    
Revolving Converted to Term Loans 9    
Total loans and leases 9,580 0  
SVB | Private Bank | Current      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 9,544    
SVB | Private Bank | 30-59 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 9    
SVB | Private Bank | 60-89 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 10    
SVB | Private Bank | 90 Days or Greater      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 17    
SVB | Private Bank | Pass      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 696    
2022 2,298    
2021 2,205    
2020 1,411    
2019 789    
2018 & Prior 1,218    
Revolving 899    
Revolving Converted to Term Loans 9    
Total loans and leases 9,525    
SVB | Private Bank | Special Mention      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 0    
2022 2    
2021 2    
2020 0    
2019 0    
2018 & Prior 6    
Revolving 6    
Revolving Converted to Term Loans 0    
Total loans and leases 16    
SVB | Private Bank | Substandard      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 0    
2022 0    
2021 0    
2020 0    
2019 2    
2018 & Prior 9    
Revolving 4    
Revolving Converted to Term Loans 0    
Total loans and leases 15    
SVB | Private Bank | Doubtful      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 0    
2022 0    
2021 0    
2020 1    
2019 1    
2018 & Prior 22    
Revolving 0    
Revolving Converted to Term Loans 0    
Total loans and leases 24    
SVB | Private Bank | Ungraded      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 0    
2022 0    
2021 0    
2020 0    
2019 0    
2018 & Prior 0    
Revolving 0    
Revolving Converted to Term Loans 0    
Total loans and leases 0    
SVB | CRE      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 171    
2022 547    
2021 266    
2020 206    
2019 298    
2018 & Prior 950    
Revolving 87    
Revolving Converted to Term Loans 5    
Total loans and leases 2,530 0  
SVB | CRE | Current      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 2,527    
SVB | CRE | 30-59 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 1    
SVB | CRE | 60-89 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 2    
SVB | CRE | 90 Days or Greater      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 0    
SVB | CRE | Pass      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 171    
2022 543    
2021 251    
2020 182    
2019 196    
2018 & Prior 876    
Revolving 85    
Revolving Converted to Term Loans 5    
Total loans and leases 2,309    
SVB | CRE | Special Mention      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 0    
2022 3    
2021 11    
2020 3    
2019 3    
2018 & Prior 17    
Revolving 0    
Revolving Converted to Term Loans 0    
Total loans and leases 37    
SVB | CRE | Substandard      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 0    
2022 1    
2021 2    
2020 21    
2019 98    
2018 & Prior 46    
Revolving 2    
Revolving Converted to Term Loans 0    
Total loans and leases 170    
SVB | CRE | Doubtful      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 0    
2022 0    
2021 2    
2020 0    
2019 1    
2018 & Prior 11    
Revolving 0    
Revolving Converted to Term Loans 0    
Total loans and leases 14    
SVB | CRE | Ungraded      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 0    
2022 0    
2021 0    
2020 0    
2019 0    
2018 & Prior 0    
Revolving 0    
Revolving Converted to Term Loans 0    
Total loans and leases 0    
SVB | Other      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 97    
2022 494    
2021 433    
2020 334    
2019 145    
2018 & Prior 588    
Revolving 403    
Revolving Converted to Term Loans 65    
Total loans and leases 2,559 $ 0  
SVB | Other | Current      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 2,548    
SVB | Other | 30-59 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 5    
SVB | Other | 60-89 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 2    
SVB | Other | 90 Days or Greater      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 4    
SVB | Other | Pass      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 97    
2022 456    
2021 416    
2020 311    
2019 139    
2018 & Prior 543    
Revolving 372    
Revolving Converted to Term Loans 65    
Total loans and leases 2,399    
SVB | Other | Special Mention      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 0    
2022 13    
2021 8    
2020 13    
2019 0    
2018 & Prior 16    
Revolving 5    
Revolving Converted to Term Loans 0    
Total loans and leases 55    
SVB | Other | Substandard      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 0    
2022 25    
2021 9    
2020 10    
2019 6    
2018 & Prior 29    
Revolving 26    
Revolving Converted to Term Loans 0    
Total loans and leases 105    
SVB | Other | Doubtful      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 0    
2022 0    
2021 0    
2020 0    
2019 0    
2018 & Prior 0    
Revolving 0    
Revolving Converted to Term Loans 0    
Total loans and leases 0    
SVB | Other | Ungraded      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 0    
2022 0    
2021 0    
2020 0    
2019 0    
2018 & Prior 0    
Revolving 0    
Revolving Converted to Term Loans 0    
Total loans and leases $ 0