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LOANS AND LEASES - Schedule of Loans Disaggregated by Year of Origination and by Risk Rating (Details) - USD ($)
$ in Millions
Mar. 31, 2024
Dec. 31, 2023
Mar. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases $ 135,370 $ 133,302 $ 138,288
Current      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 133,848 131,752  
30-59 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 661 606  
60-89 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 179 329  
90 Days or Greater      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 682 615  
Commercial      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 5,846 16,239  
Term loans by origination year, year two 14,084 13,688  
Term loans by origination year, year three 13,520 9,909  
Term loans by origination year, year four 9,655 7,192  
Term loans by origination year, year five 6,884 4,877  
Term loans by origination year, more than five years before current fiscal year 10,769 6,505  
Revolving 6,776 7,746  
Revolving Converted to Term Loans 67 76  
Total loans and leases 67,601 66,232  
Commercial | Current      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 66,485 65,097  
Commercial | 30-59 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 438 396  
Commercial | 60-89 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 132 270  
Commercial | 90 Days or Greater      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 546 469  
Commercial | Commercial construction      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 142 1,062  
Term loans by origination year, year two 1,239 1,672  
Term loans by origination year, year three 1,605 631  
Term loans by origination year, year four 579 338  
Term loans by origination year, year five 272 110  
Term loans by origination year, more than five years before current fiscal year 172 62  
Revolving 49 39  
Revolving Converted to Term Loans 4 4  
Total loans and leases 4,062 3,918  
Commercial | Commercial construction | Current      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 4,022 3,865  
Commercial | Commercial construction | 30-59 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 40 43  
Commercial | Commercial construction | 60-89 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 0 8  
Commercial | Commercial construction | 90 Days or Greater      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 0 2  
Commercial | Commercial construction | Pass      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 138 1,062  
Term loans by origination year, year two 1,239 1,615  
Term loans by origination year, year three 1,558 620  
Term loans by origination year, year four 569 226  
Term loans by origination year, year five 212 63  
Term loans by origination year, more than five years before current fiscal year 99 57  
Revolving 49 39  
Revolving Converted to Term Loans 4 4  
Total loans and leases 3,868 3,686  
Commercial | Commercial construction | Special Mention      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 0 0  
Term loans by origination year, year two 0 10  
Term loans by origination year, year three 41 6  
Term loans by origination year, year four 6 81  
Term loans by origination year, year five 60 47  
Term loans by origination year, more than five years before current fiscal year 58 0  
Revolving 0 0  
Revolving Converted to Term Loans 0 0  
Total loans and leases 165 144  
Commercial | Commercial construction | Substandard      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 4 0  
Term loans by origination year, year two 0 47  
Term loans by origination year, year three 6 5  
Term loans by origination year, year four 4 31  
Term loans by origination year, year five 0 0  
Term loans by origination year, more than five years before current fiscal year 15 5  
Revolving 0 0  
Revolving Converted to Term Loans 0 0  
Total loans and leases 29 88  
Commercial | Commercial construction | Doubtful      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 0 0  
Term loans by origination year, year two 0 0  
Term loans by origination year, year three 0 0  
Term loans by origination year, year four 0 0  
Term loans by origination year, year five 0 0  
Term loans by origination year, more than five years before current fiscal year 0 0  
Revolving 0 0  
Revolving Converted to Term Loans 0 0  
Total loans and leases 0 0  
Commercial | Commercial construction | Ungraded      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 0 0  
Term loans by origination year, year two 0 0  
Term loans by origination year, year three 0 0  
Term loans by origination year, year four 0 0  
Term loans by origination year, year five 0 0  
Term loans by origination year, more than five years before current fiscal year 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]      
Term loans by origination year, year one 830 2,577  
Term loans by origination year, year two 2,558 2,969  
Term loans by origination year, year three 2,980 3,025  
Term loans by origination year, year four 2,965 2,556  
Term loans by origination year, year five 2,477 1,754  
Term loans by origination year, more than five years before current fiscal year 3,912 2,355  
Revolving 227 204  
Revolving Converted to Term Loans 30 31  
Total loans and leases 15,979 15,471  
Commercial | Owner occupied commercial mortgage | Current      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 15,883 15,393  
Commercial | Owner occupied commercial mortgage | 30-59 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 37 21  
Commercial | Owner occupied commercial mortgage | 60-89 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 13 10  
Commercial | Owner occupied commercial mortgage | 90 Days or Greater      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 46 47  
Commercial | Owner occupied commercial mortgage | Pass      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 819 2,544  
Term loans by origination year, year two 2,526 2,859  
Term loans by origination year, year three 2,869 2,902  
Term loans by origination year, year four 2,842 2,467  
Term loans by origination year, year five 2,389 1,666  
Term loans by origination year, more than five years before current fiscal year 3,576 2,107  
Revolving 215 193  
Revolving Converted to Term Loans 29 31  
Total loans and leases 15,265 14,769  
Commercial | Owner occupied commercial mortgage | Special Mention      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 2 26  
Term loans by origination year, year two 22 19  
Term loans by origination year, year three 16 24  
Term loans by origination year, year four 20 28  
Term loans by origination year, year five 24 43  
Term loans by origination year, more than five years before current fiscal year 110 72  
Revolving 1 1  
Revolving Converted to Term Loans 0 0  
Total loans and leases 195 213  
Commercial | Owner occupied commercial mortgage | Substandard      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 9 7  
Term loans by origination year, year two 10 91  
Term loans by origination year, year three 95 99  
Term loans by origination year, year four 103 61  
Term loans by origination year, year five 64 45  
Term loans by origination year, more than five years before current fiscal year 226 176  
Revolving 11 10  
Revolving Converted to Term Loans 1 0  
Total loans and leases 519 489  
Commercial | Owner occupied commercial mortgage | Doubtful      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 0 0  
Term loans by origination year, year two 0 0  
Term loans by origination year, year three 0 0  
Term loans by origination year, year four 0 0  
Term loans by origination year, year five 0 0  
Term loans by origination year, more than five years before current fiscal year 0 0  
Revolving 0 0  
Revolving Converted to Term Loans 0 0  
Total loans and leases 0 0  
Commercial | Owner occupied commercial mortgage | Ungraded      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 0 0  
Term loans by origination year, year two 0 0  
Term loans by origination year, year three 0 0  
Term loans by origination year, year four 0 0  
Term loans by origination year, year five 0 0  
Term loans by origination year, more than five years before current fiscal year 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]      
Term loans by origination year, year one 682 3,148  
Term loans by origination year, year two 3,127 3,243  
Term loans by origination year, year three 3,205 2,274  
Term loans by origination year, year four 2,266 2,096  
Term loans by origination year, year five 2,034 1,751  
Term loans by origination year, more than five years before current fiscal year 3,942 2,389  
Revolving 68 91  
Revolving Converted to Term Loans 5 3  
Total loans and leases 15,329 14,995  
Commercial | Non-owner occupied commercial mortgage | Current      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 14,808 14,424  
Commercial | Non-owner occupied commercial mortgage | 30-59 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 118 100  
Commercial | Non-owner occupied commercial mortgage | 60-89 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 34 188  
Commercial | Non-owner occupied commercial mortgage | 90 Days or Greater      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 369 283  
Commercial | Non-owner occupied commercial mortgage | Pass      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 681 3,132  
Term loans by origination year, year two 3,111 3,150  
Term loans by origination year, year three 3,058 2,212  
Term loans by origination year, year four 2,204 1,860  
Term loans by origination year, year five 1,825 1,148  
Term loans by origination year, more than five years before current fiscal year 2,925 1,930  
Revolving 63 80  
Revolving Converted to Term Loans 3 3  
Total loans and leases 13,870 13,515  
Commercial | Non-owner occupied commercial mortgage | Special Mention      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 0 14  
Term loans by origination year, year two 12 45  
Term loans by origination year, year three 107 33  
Term loans by origination year, year four 33 96  
Term loans by origination year, year five 66 171  
Term loans by origination year, more than five years before current fiscal year 209 90  
Revolving 5 9  
Revolving Converted to Term Loans 0 0  
Total loans and leases 432 458  
Commercial | Non-owner occupied commercial mortgage | Substandard      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 1 2  
Term loans by origination year, year two 4 48  
Term loans by origination year, year three 40 27  
Term loans by origination year, year four 27 127  
Term loans by origination year, year five 123 365  
Term loans by origination year, more than five years before current fiscal year 701 330  
Revolving 0 0  
Revolving Converted to Term Loans 0 0  
Total loans and leases 896 899  
Commercial | Non-owner occupied commercial mortgage | Doubtful      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 0 0  
Term loans by origination year, year two 0 0  
Term loans by origination year, year three 0 2  
Term loans by origination year, year four 2 13  
Term loans by origination year, year five 20 67  
Term loans by origination year, more than five years before current fiscal year 107 39  
Revolving 0 2  
Revolving Converted to Term Loans 2 0  
Total loans and leases 131 123  
Commercial | Non-owner occupied commercial mortgage | Ungraded      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 0 0  
Term loans by origination year, year two 0 0  
Term loans by origination year, year three 0 0  
Term loans by origination year, year four 0 0  
Term loans by origination year, year five 0 0  
Term loans by origination year, more than five years before current fiscal year 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]      
Term loans by origination year, year one 3,941 8,671  
Term loans by origination year, year two 6,451 5,247  
Term loans by origination year, year three 5,224 3,645  
Term loans by origination year, year four 3,555 1,966  
Term loans by origination year, year five 1,904 1,160  
Term loans by origination year, more than five years before current fiscal year 2,629 1,655  
Revolving 6,432 7,412  
Revolving Converted to Term Loans 28 38  
Total loans and leases 30,164 29,794  
Commercial | Commercial and industrial | Current      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 29,782 29,452  
Commercial | Commercial and industrial | 30-59 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 191 177  
Commercial | Commercial and industrial | 60-89 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 72 49  
Commercial | Commercial and industrial | 90 Days or Greater      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 119 116  
Commercial | Commercial and industrial | Pass      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 3,847 8,472  
Term loans by origination year, year two 6,269 4,858  
Term loans by origination year, year three 4,768 3,347  
Term loans by origination year, year four 3,202 1,660  
Term loans by origination year, year five 1,621 952  
Term loans by origination year, more than five years before current fiscal year 2,119 1,351  
Revolving 5,749 6,818  
Revolving Converted to Term Loans 26 34  
Total loans and leases 27,601 27,492  
Commercial | Commercial and industrial | Special Mention      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 59 105  
Term loans by origination year, year two 79 134  
Term loans by origination year, year three 178 149  
Term loans by origination year, year four 193 89  
Term loans by origination year, year five 32 69  
Term loans by origination year, more than five years before current fiscal year 110 26  
Revolving 204 194  
Revolving Converted to Term Loans 0 0  
Total loans and leases 855 766  
Commercial | Commercial and industrial | Substandard      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 35 92  
Term loans by origination year, year two 84 236  
Term loans by origination year, year three 222 144  
Term loans by origination year, year four 141 217  
Term loans by origination year, year five 248 127  
Term loans by origination year, more than five years before current fiscal year 366 258  
Revolving 338 264  
Revolving Converted to Term Loans 2 4  
Total loans and leases 1,436 1,342  
Commercial | Commercial and industrial | Doubtful      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 0 2  
Term loans by origination year, year two 19 19  
Term loans by origination year, year three 56 5  
Term loans by origination year, year four 19 0  
Term loans by origination year, year five 3 12  
Term loans by origination year, more than five years before current fiscal year 34 20  
Revolving 8 13  
Revolving Converted to Term Loans 0 0  
Total loans and leases 139 71  
Commercial | Commercial and industrial | Ungraded      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 0 0  
Term loans by origination year, year two 0 0  
Term loans by origination year, year three 0 0  
Term loans by origination year, year four 0 0  
Term loans by origination year, year five 0 0  
Term loans by origination year, more than five years before current fiscal year 0 0  
Revolving 133 123  
Revolving Converted to Term Loans 0 0  
Total loans and leases 133 123  
Commercial | Leases      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 251 781  
Term loans by origination year, year two 709 557  
Term loans by origination year, year three 506 334  
Term loans by origination year, year four 290 236  
Term loans by origination year, year five 197 102  
Term loans by origination year, more than five years before current fiscal year 114 44  
Revolving 0 0  
Revolving Converted to Term Loans 0 0  
Total loans and leases 2,067 2,054  
Commercial | Leases | Current      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 1,990 1,963  
Commercial | Leases | 30-59 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 52 55  
Commercial | Leases | 60-89 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 13 15  
Commercial | Leases | 90 Days or Greater      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 12 21  
Commercial | Leases | Pass      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 247 732  
Term loans by origination year, year two 657 499  
Term loans by origination year, year three 446 290  
Term loans by origination year, year four 251 209  
Term loans by origination year, year five 173 91  
Term loans by origination year, more than five years before current fiscal year 98 35  
Revolving 0 0  
Revolving Converted to Term Loans 0 0  
Total loans and leases 1,872 1,856  
Commercial | Leases | Special Mention      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 2 18  
Term loans by origination year, year two 17 22  
Term loans by origination year, year three 27 20  
Term loans by origination year, year four 18 7  
Term loans by origination year, year five 5 4  
Term loans by origination year, more than five years before current fiscal year 3 1  
Revolving 0 0  
Revolving Converted to Term Loans 0 0  
Total loans and leases 72 72  
Commercial | Leases | Substandard      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 2 28  
Term loans by origination year, year two 32 32  
Term loans by origination year, year three 29 21  
Term loans by origination year, year four 18 19  
Term loans by origination year, year five 18 6  
Term loans by origination year, more than five years before current fiscal year 12 8  
Revolving 0 0  
Revolving Converted to Term Loans 0 0  
Total loans and leases 111 114  
Commercial | Leases | Doubtful      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 0 3  
Term loans by origination year, year two 3 4  
Term loans by origination year, year three 4 3  
Term loans by origination year, year four 3 1  
Term loans by origination year, year five 1 1  
Term loans by origination year, more than five years before current fiscal year 1 0  
Revolving 0 0  
Revolving Converted to Term Loans 0 0  
Total loans and leases 12 12  
Commercial | Leases | Ungraded      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 0 0  
Term loans by origination year, year two 0 0  
Term loans by origination year, year three 0 0  
Term loans by origination year, year four 0 0  
Term loans by origination year, year five 0 0  
Term loans by origination year, more than five years before current fiscal year 0 0  
Revolving 0 0  
Revolving Converted to Term Loans 0 0  
Total loans and leases 0 0  
SVB      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 1,307 4,560  
Term loans by origination year, year two 4,570 4,548  
Term loans by origination year, year three 3,929 1,632  
Term loans by origination year, year four 1,274 513  
Term loans by origination year, year five 439 129  
Term loans by origination year, more than five years before current fiscal year 103 60  
Revolving 28,149 27,996  
Revolving Converted to Term Loans 75 73  
Total loans and leases 39,846 39,511  
SVB | Current      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 39,767 39,396  
SVB | 30-59 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 39 42  
SVB | 60-89 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 2 17  
SVB | 90 Days or Greater      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 38 56  
SVB | Global fund banking      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 341 453  
Term loans by origination year, year two 649 209  
Term loans by origination year, year three 199 49  
Term loans by origination year, year four 38 39  
Term loans by origination year, year five 24 14  
Term loans by origination year, more than five years before current fiscal year 16 3  
Revolving 25,185 24,720  
Revolving Converted to Term Loans 66 66  
Total loans and leases 26,518 25,553  
SVB | Global fund banking | Current      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 26,518 25,553  
SVB | Global fund banking | 30-59 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 0 0  
SVB | Global fund banking | 60-89 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 0 0  
SVB | Global fund banking | 90 Days or Greater      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 0 0  
SVB | Global fund banking | Pass      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 341 453  
Term loans by origination year, year two 649 202  
Term loans by origination year, year three 192 40  
Term loans by origination year, year four 30 36  
Term loans by origination year, year five 20 14  
Term loans by origination year, more than five years before current fiscal year 16 3  
Revolving 25,184 24,702  
Revolving Converted to Term Loans 66 66  
Total loans and leases 26,498 25,516  
SVB | Global fund banking | Special Mention      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 0 0  
Term loans by origination year, year two 0 0  
Term loans by origination year, year three 0 0  
Term loans by origination year, year four 0 0  
Term loans by origination year, year five 0 0  
Term loans by origination year, more than five years before current fiscal year 0 0  
Revolving 0 0  
Revolving Converted to Term Loans 0 0  
Total loans and leases 0 0  
SVB | Global fund banking | Substandard      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 0 0  
Term loans by origination year, year two 0 7  
Term loans by origination year, year three 7 9  
Term loans by origination year, year four 8 3  
Term loans by origination year, year five 4 0  
Term loans by origination year, more than five years before current fiscal year 0 0  
Revolving 1 18  
Revolving Converted to Term Loans 0 0  
Total loans and leases 20 37  
SVB | Global fund banking | Doubtful      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 0 0  
Term loans by origination year, year two 0 0  
Term loans by origination year, year three 0 0  
Term loans by origination year, year four 0 0  
Term loans by origination year, year five 0 0  
Term loans by origination year, more than five years before current fiscal year 0 0  
Revolving 0 0  
Revolving Converted to Term Loans 0 0  
Total loans and leases 0 0  
SVB | Global fund banking | Ungraded      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 0 0  
Term loans by origination year, year two 0 0  
Term loans by origination year, year three 0 0  
Term loans by origination year, year four 0 0  
Term loans by origination year, year five 0 0  
Term loans by origination year, more than five years before current fiscal year 0 0  
Revolving 0 0  
Revolving Converted to Term Loans 0 0  
Total loans and leases 0 0  
SVB | Investor dependent - early stage      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 73 481  
Term loans by origination year, year two 460 617  
Term loans by origination year, year three 499 140  
Term loans by origination year, year four 86 7  
Term loans by origination year, year five 4 1  
Term loans by origination year, more than five years before current fiscal year 1 1  
Revolving 166 154  
Revolving Converted to Term Loans 4 2  
Total loans and leases 1,293 1,403  
SVB | Investor dependent - early stage | Current      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 1,254 1,372  
SVB | Investor dependent - early stage | 30-59 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 30 10  
SVB | Investor dependent - early stage | 60-89 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 1 12  
SVB | Investor dependent - early stage | 90 Days or Greater      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 8 9  
SVB | Investor dependent - early stage | Pass      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 71 421  
Term loans by origination year, year two 361 453  
Term loans by origination year, year three 336 85  
Term loans by origination year, year four 51 4  
Term loans by origination year, year five 2 1  
Term loans by origination year, more than five years before current fiscal year 0 0  
Revolving 111 99  
Revolving Converted to Term Loans 4 2  
Total loans and leases 936 1,065  
SVB | Investor dependent - early stage | Special Mention      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 0 8  
Term loans by origination year, year two 13 14  
Term loans by origination year, year three 15 1  
Term loans by origination year, year four 1 0  
Term loans by origination year, year five 0 0  
Term loans by origination year, more than five years before current fiscal year 0 0  
Revolving 0 0  
Revolving Converted to Term Loans 0 0  
Total loans and leases 29 23  
SVB | Investor dependent - early stage | Substandard      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 2 40  
Term loans by origination year, year two 72 138  
Term loans by origination year, year three 119 51  
Term loans by origination year, year four 30 3  
Term loans by origination year, year five 2 0  
Term loans by origination year, more than five years before current fiscal year 0 0  
Revolving 52 51  
Revolving Converted to Term Loans 0 0  
Total loans and leases 277 283  
SVB | Investor dependent - early stage | Doubtful      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 0 12  
Term loans by origination year, year two 14 12  
Term loans by origination year, year three 29 3  
Term loans by origination year, year four 4 0  
Term loans by origination year, year five 0 0  
Term loans by origination year, more than five years before current fiscal year 1 1  
Revolving 3 4  
Revolving Converted to Term Loans 0 0  
Total loans and leases 51 32  
SVB | Investor dependent - early stage | Ungraded      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 0 0  
Term loans by origination year, year two 0 0  
Term loans by origination year, year three 0 0  
Term loans by origination year, year four 0 0  
Term loans by origination year, year five 0 0  
Term loans by origination year, more than five years before current fiscal year 0 0  
Revolving 0 0  
Revolving Converted to Term Loans 0 0  
Total loans and leases 0 0  
SVB | Investor dependent - growth stage      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 246 1,106  
Term loans by origination year, year two 1,018 1,196  
Term loans by origination year, year three 980 320  
Term loans by origination year, year four 212 32  
Term loans by origination year, year five 9 9  
Term loans by origination year, more than five years before current fiscal year 1 2  
Revolving 225 227  
Revolving Converted to Term Loans 5 5  
Total loans and leases 2,696 2,897  
SVB | Investor dependent - growth stage | Current      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 2,685 2,883  
SVB | Investor dependent - growth stage | 30-59 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 8 5  
SVB | Investor dependent - growth stage | 60-89 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 1 2  
SVB | Investor dependent - growth stage | 90 Days or Greater      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 2 7  
SVB | Investor dependent - growth stage | Pass      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 235 1,034  
Term loans by origination year, year two 897 967  
Term loans by origination year, year three 747 217  
Term loans by origination year, year four 129 25  
Term loans by origination year, year five 6 8  
Term loans by origination year, more than five years before current fiscal year 1 2  
Revolving 202 198  
Revolving Converted to Term Loans 5 5  
Total loans and leases 2,222 2,456  
SVB | Investor dependent - growth stage | Special Mention      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 0 6  
Term loans by origination year, year two 15 25  
Term loans by origination year, year three 32 0  
Term loans by origination year, year four 18 0  
Term loans by origination year, year five 0 0  
Term loans by origination year, more than five years before current fiscal year 0 0  
Revolving 0 0  
Revolving Converted to Term Loans 0 0  
Total loans and leases 65 31  
SVB | Investor dependent - growth stage | Substandard      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 1 66  
Term loans by origination year, year two 106 192  
Term loans by origination year, year three 189 83  
Term loans by origination year, year four 57 7  
Term loans by origination year, year five 3 1  
Term loans by origination year, more than five years before current fiscal year 0 0  
Revolving 17 27  
Revolving Converted to Term Loans 0 0  
Total loans and leases 373 376  
SVB | Investor dependent - growth stage | Doubtful      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 10 0  
Term loans by origination year, year two 0 12  
Term loans by origination year, year three 12 20  
Term loans by origination year, year four 8 0  
Term loans by origination year, year five 0 0  
Term loans by origination year, more than five years before current fiscal year 0 0  
Revolving 6 2  
Revolving Converted to Term Loans 0 0  
Total loans and leases 36 34  
SVB | Investor dependent - growth stage | Ungraded      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 0 0  
Term loans by origination year, year two 0 0  
Term loans by origination year, year three 0 0  
Term loans by origination year, year four 0 0  
Term loans by origination year, year five 0 0  
Term loans by origination year, more than five years before current fiscal year 0 0  
Revolving 0 0  
Revolving Converted to Term Loans 0 0  
Total loans and leases 0 0  
SVB | Innovation C&I and cash flow dependent      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 647 2,520  
Term loans by origination year, year two 2,443 2,526  
Term loans by origination year, year three 2,251 1,123  
Term loans by origination year, year four 938 435  
Term loans by origination year, year five 402 105  
Term loans by origination year, more than five years before current fiscal year 85 54  
Revolving 2,573 2,895  
Revolving Converted to Term Loans 0 0  
Total loans and leases 9,339 9,658  
SVB | Innovation C&I and cash flow dependent | Current      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 9,310 9,588  
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 1 27  
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 0 3  
SVB | Innovation C&I and cash flow dependent | 90 Days or Greater      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 28 40  
SVB | Innovation C&I and cash flow dependent | Pass      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 565 2,370  
Term loans by origination year, year two 2,334 2,238  
Term loans by origination year, year three 1,931 833  
Term loans by origination year, year four 703 293  
Term loans by origination year, year five 274 80  
Term loans by origination year, more than five years before current fiscal year 78 44  
Revolving 2,294 2,598  
Revolving Converted to Term Loans 0 0  
Total loans and leases 8,179 8,456  
SVB | Innovation C&I and cash flow dependent | Special Mention      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 54 99  
Term loans by origination year, year two 59 103  
Term loans by origination year, year three 72 36  
Term loans by origination year, year four 19 66  
Term loans by origination year, year five 31 0  
Term loans by origination year, more than five years before current fiscal year 0 0  
Revolving 41 92  
Revolving Converted to Term Loans 0 0  
Total loans and leases 276 396  
SVB | Innovation C&I and cash flow dependent | Substandard      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 24 51  
Term loans by origination year, year two 50 185  
Term loans by origination year, year three 248 254  
Term loans by origination year, year four 216 76  
Term loans by origination year, year five 97 25  
Term loans by origination year, more than five years before current fiscal year 0 0  
Revolving 215 175  
Revolving Converted to Term Loans 0 0  
Total loans and leases 850 766  
SVB | Innovation C&I and cash flow dependent | Doubtful      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 4 0  
Term loans by origination year, year two 0 0  
Term loans by origination year, year three 0 0  
Term loans by origination year, year four 0 0  
Term loans by origination year, year five 0 0  
Term loans by origination year, more than five years before current fiscal year 7 10  
Revolving 23 30  
Revolving Converted to Term Loans 0 0  
Total loans and leases 34 40  
SVB | Innovation C&I and cash flow dependent | Ungraded      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 0 0  
Term loans by origination year, year two 0 0  
Term loans by origination year, year three 0 0  
Term loans by origination year, year four 0 0  
Term loans by origination year, year five 0 0  
Term loans by origination year, more than five years before current fiscal year 0 0  
Revolving 0 0  
Revolving Converted to Term Loans 0 0  
Total loans and leases 0 0  
Consumer      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 724 3,903  
Term loans by origination year, year two 3,849 6,212  
Term loans by origination year, year three 6,070 5,860  
Term loans by origination year, year four 5,753 3,331  
Term loans by origination year, year five 3,262 1,455  
Term loans by origination year, more than five years before current fiscal year 5,252 3,920  
Revolving 2,906 2,787  
Revolving Converted to Term Loans 107 91  
Total loans and leases 27,923 27,559  
Consumer | Current      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 27,596 27,259  
Consumer | 30-59 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 184 168  
Consumer | 60-89 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 45 42  
Consumer | 90 Days or Greater      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total loans and leases 98 90  
Consumer | Residential mortgage      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 485 3,160  
Term loans by origination year, year two 3,141 5,609  
Term loans by origination year, year three 5,545 5,543  
Term loans by origination year, year four 5,470 3,191  
Term loans by origination year, year five 3,139 1,393  
Term loans by origination year, more than five years before current fiscal year 5,109 3,867  
Revolving 12 13  
Revolving Converted to Term Loans 0 0  
Total loans and leases 22,901 22,776  
Consumer | Residential mortgage | Current      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 485 3,155  
Term loans by origination year, year two 3,131 5,588  
Term loans by origination year, year three 5,517 5,521  
Term loans by origination year, year four 5,445 3,174  
Term loans by origination year, year five 3,121 1,381  
Term loans by origination year, more than five years before current fiscal year 4,913 3,702  
Revolving 12 13  
Revolving Converted to Term Loans 0 0  
Total loans and leases 22,624 22,534  
Consumer | Residential mortgage | 30-59 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 0 3  
Term loans by origination year, year two 8 16  
Term loans by origination year, year three 22 15  
Term loans by origination year, year four 19 7  
Term loans by origination year, year five 11 10  
Term loans by origination year, more than five years before current fiscal year 97 85  
Revolving 0 0  
Revolving Converted to Term Loans 0 0  
Total loans and leases 157 136  
Consumer | Residential mortgage | 60-89 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 0 1  
Term loans by origination year, year two 1 1  
Term loans by origination year, year three 3 5  
Term loans by origination year, year four 3 4  
Term loans by origination year, year five 1 1  
Term loans by origination year, more than five years before current fiscal year 30 21  
Revolving 0 0  
Revolving Converted to Term Loans 0 0  
Total loans and leases 38 33  
Consumer | Residential mortgage | 90 Days or Greater      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 0 1  
Term loans by origination year, year two 1 4  
Term loans by origination year, year three 3 2  
Term loans by origination year, year four 3 6  
Term loans by origination year, year five 6 1  
Term loans by origination year, more than five years before current fiscal year 69 59  
Revolving 0 0  
Revolving Converted to Term Loans 0 0  
Total loans and leases 82 73  
Consumer | Revolving mortgage      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 0 0  
Term loans by origination year, year two 0 0  
Term loans by origination year, year three 0 0  
Term loans by origination year, year four 0 0  
Term loans by origination year, year five 0 0  
Term loans by origination year, more than five years before current fiscal year 0 0  
Revolving 2,133 2,074  
Revolving Converted to Term Loans 107 91  
Total loans and leases 2,240 2,165  
Consumer | Revolving mortgage | Current      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 0 0  
Term loans by origination year, year two 0 0  
Term loans by origination year, year three 0 0  
Term loans by origination year, year four 0 0  
Term loans by origination year, year five 0 0  
Term loans by origination year, more than five years before current fiscal year 0 0  
Revolving 2,116 2,056  
Revolving Converted to Term Loans 97 80  
Total loans and leases 2,213 2,136  
Consumer | Revolving mortgage | 30-59 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 0 0  
Term loans by origination year, year two 0 0  
Term loans by origination year, year three 0 0  
Term loans by origination year, year four 0 0  
Term loans by origination year, year five 0 0  
Term loans by origination year, more than five years before current fiscal year 0 0  
Revolving 11 11  
Revolving Converted to Term Loans 3 4  
Total loans and leases 14 15  
Consumer | Revolving mortgage | 60-89 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 0 0  
Term loans by origination year, year two 0 0  
Term loans by origination year, year three 0 0  
Term loans by origination year, year four 0 0  
Term loans by origination year, year five 0 0  
Term loans by origination year, more than five years before current fiscal year 0 0  
Revolving 1 1  
Revolving Converted to Term Loans 2 2  
Total loans and leases 3 3  
Consumer | Revolving mortgage | 90 Days or Greater      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 0 0  
Term loans by origination year, year two 0 0  
Term loans by origination year, year three 0 0  
Term loans by origination year, year four 0 0  
Term loans by origination year, year five 0 0  
Term loans by origination year, more than five years before current fiscal year 0 0  
Revolving 5 6  
Revolving Converted to Term Loans 5 5  
Total loans and leases 10 11  
Consumer | Consumer auto      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 177 527  
Term loans by origination year, year two 490 432  
Term loans by origination year, year three 391 265  
Term loans by origination year, year four 236 132  
Term loans by origination year, year five 115 57  
Term loans by origination year, more than five years before current fiscal year 67 29  
Revolving 0 0  
Revolving Converted to Term Loans 0 0  
Total loans and leases 1,476 1,442  
Consumer | Consumer auto | Current      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 177 525  
Term loans by origination year, year two 487 427  
Term loans by origination year, year three 387 261  
Term loans by origination year, year four 233 131  
Term loans by origination year, year five 114 56  
Term loans by origination year, more than five years before current fiscal year 66 28  
Revolving 0 0  
Revolving Converted to Term Loans 0 0  
Total loans and leases 1,464 1,428  
Consumer | Consumer auto | 30-59 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 0 1  
Term loans by origination year, year two 2 3  
Term loans by origination year, year three 2 2  
Term loans by origination year, year four 2 1  
Term loans by origination year, year five 1 1  
Term loans by origination year, more than five years before current fiscal year 1 1  
Revolving 0 0  
Revolving Converted to Term Loans 0 0  
Total loans and leases 8 9  
Consumer | Consumer auto | 60-89 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 0 1  
Term loans by origination year, year two 0 1  
Term loans by origination year, year three 1 1  
Term loans by origination year, year four 1 0  
Term loans by origination year, year five 0 0  
Term loans by origination year, more than five years before current fiscal year 0 0  
Revolving 0 0  
Revolving Converted to Term Loans 0 0  
Total loans and leases 2 3  
Consumer | Consumer auto | 90 Days or Greater      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 0 0  
Term loans by origination year, year two 1 1  
Term loans by origination year, year three 1 1  
Term loans by origination year, year four 0 0  
Term loans by origination year, year five 0 0  
Term loans by origination year, more than five years before current fiscal year 0 0  
Revolving 0 0  
Revolving Converted to Term Loans 0 0  
Total loans and leases 2 2  
Consumer | Consumer other      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 62 216  
Term loans by origination year, year two 218 171  
Term loans by origination year, year three 134 52  
Term loans by origination year, year four 47 8  
Term loans by origination year, year five 8 5  
Term loans by origination year, more than five years before current fiscal year 76 24  
Revolving 761 700  
Revolving Converted to Term Loans 0 0  
Total loans and leases 1,306 1,176  
Consumer | Consumer other | Current      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 62 215  
Term loans by origination year, year two 217 170  
Term loans by origination year, year three 134 52  
Term loans by origination year, year four 47 8  
Term loans by origination year, year five 8 5  
Term loans by origination year, more than five years before current fiscal year 73 21  
Revolving 754 690  
Revolving Converted to Term Loans 0 0  
Total loans and leases 1,295 1,161  
Consumer | Consumer other | 30-59 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 0 1  
Term loans by origination year, year two 1 1  
Term loans by origination year, year three 0 0  
Term loans by origination year, year four 0 0  
Term loans by origination year, year five 0 0  
Term loans by origination year, more than five years before current fiscal year 1 0  
Revolving 3 6  
Revolving Converted to Term Loans 0 0  
Total loans and leases 5 8  
Consumer | Consumer other | 60-89 Days Past Due      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 0 0  
Term loans by origination year, year two 0 0  
Term loans by origination year, year three 0 0  
Term loans by origination year, year four 0 0  
Term loans by origination year, year five 0 0  
Term loans by origination year, more than five years before current fiscal year 0 1  
Revolving 2 2  
Revolving Converted to Term Loans 0 0  
Total loans and leases 2 3  
Consumer | Consumer other | 90 Days or Greater      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Term loans by origination year, year one 0 0  
Term loans by origination year, year two 0 0  
Term loans by origination year, year three 0 0  
Term loans by origination year, year four 0 0  
Term loans by origination year, year five 0 0  
Term loans by origination year, more than five years before current fiscal year 2 2  
Revolving 2 2  
Revolving Converted to Term Loans 0 0  
Total loans and leases $ 4 $ 4