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Loans - Commercial Banking: Risk Profile by Internal Risk Rating (Details) - USD ($) $ in Millions | Mar. 31, 2024 | Dec. 31, 2023
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Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Total loans held for investment | $ 315,154 | $ 320,472
Commercial Banking: |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Term Loans by Vintage Year, Year 1 | 1,790 | 10,556
Term Loans by Vintage Year, Year 2 | 10,037 | 18,879
Term Loans by Vintage Year, Year 3 | 18,299 | 11,282
Term Loans by Vintage Year, Year 4 | 10,790 | 5,124
Term Loans by Vintage Year, Year 5 | 4,859 | 5,444
Prior | 14,907 | 10,271
Total Term Loans | 60,682 | 61,556
Revolving Loans | 28,622 | 28,740
Revolving Loans Converted to Term | 157 | 192
Total loans held for investment | 89,461 | 90,488
Commercial Banking: | Commercial and multifamily real estate |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Term Loans by Vintage Year, Year 1 | 711 | 3,281
Term Loans by Vintage Year, Year 2 | 2,913 | 6,185
Term Loans by Vintage Year, Year 3 | 5,938 | 3,603
Term Loans by Vintage Year, Year 4 | 3,376 | 1,303
Term Loans by Vintage Year, Year 5 | 1,214 | 2,614
Prior | 6,910 | 4,737
Total Term Loans | 21,062 | 21,723
Revolving Loans | 13,183 | 12,698
Revolving Loans Converted to Term | 27 | 25
Total loans held for investment | 34,272 | 34,446
Commercial Banking: | Commercial and multifamily real estate | Noncriticized |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Term Loans by Vintage Year, Year 1 | 646 | 3,068
Term Loans by Vintage Year, Year 2 | 2,794 | 4,665
Term Loans by Vintage Year, Year 3 | 4,392 | 2,773
Term Loans by Vintage Year, Year 4 | 2,573 | 1,019
Term Loans by Vintage Year, Year 5 | 994 | 2,104
Prior | 5,280 | 3,670
Total Term Loans | 16,679 | 17,299
Revolving Loans | 13,046 | 12,565
Revolving Loans Converted to Term | 25 | 25
Total loans held for investment | 29,750 | 29,889
Commercial Banking: | Commercial and multifamily real estate | Criticized | Criticized performing |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Term Loans by Vintage Year, Year 1 | 53 | 148
Term Loans by Vintage Year, Year 2 | 59 | 1,494
Term Loans by Vintage Year, Year 3 | 1,501 | 706
Term Loans by Vintage Year, Year 4 | 685 | 284
Term Loans by Vintage Year, Year 5 | 220 | 463
Prior | 1,331 | 904
Total Term Loans | 3,849 | 3,999
Revolving Loans | 130 | 133
Revolving Loans Converted to Term | 2 | 0
Total loans held for investment | 3,981 | 4,132
Commercial Banking: | Commercial and multifamily real estate | Criticized | Criticized nonperforming |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Term Loans by Vintage Year, Year 1 | 12 | 65
Term Loans by Vintage Year, Year 2 | 60 | 26
Term Loans by Vintage Year, Year 3 | 45 | 124
Term Loans by Vintage Year, Year 4 | 118 | 0
Term Loans by Vintage Year, Year 5 | 0 | 47
Prior | 299 | 163
Total Term Loans | 534 | 425
Revolving Loans | 7 | 0
Revolving Loans Converted to Term | 0 | 0
Total loans held for investment | 541 | 425
Commercial Banking: | Commercial and industrial |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Term Loans by Vintage Year, Year 1 | 1,079 | 7,275
Term Loans by Vintage Year, Year 2 | 7,124 | 12,694
Term Loans by Vintage Year, Year 3 | 12,361 | 7,679
Term Loans by Vintage Year, Year 4 | 7,414 | 3,821
Term Loans by Vintage Year, Year 5 | 3,645 | 2,830
Prior | 7,997 | 5,534
Total Term Loans | 39,620 | 39,833
Revolving Loans | 15,439 | 16,042
Revolving Loans Converted to Term | 130 | 167
Total loans held for investment | 55,189 | 56,042
Commercial Banking: | Commercial and industrial | Noncriticized |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Term Loans by Vintage Year, Year 1 | 1,037 | 6,909
Term Loans by Vintage Year, Year 2 | 6,784 | 11,935
Term Loans by Vintage Year, Year 3 | 11,627 | 6,994
Term Loans by Vintage Year, Year 4 | 6,701 | 3,566
Term Loans by Vintage Year, Year 5 | 3,341 | 2,359
Prior | 7,339 | 5,117
Total Term Loans | 36,829 | 36,880
Revolving Loans | 14,096 | 14,822
Revolving Loans Converted to Term | 129 | 167
Total loans held for investment | 51,054 | 51,869
Commercial Banking: | Commercial and industrial | Criticized | Criticized performing |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Term Loans by Vintage Year, Year 1 | 42 | 353
Term Loans by Vintage Year, Year 2 | 328 | 706
Term Loans by Vintage Year, Year 3 | 638 | 655
Term Loans by Vintage Year, Year 4 | 672 | 237
Term Loans by Vintage Year, Year 5 | 126 | 348
Prior | 437 | 349
Total Term Loans | 2,243 | 2,648
Revolving Loans | 1,284 | 1,189
Revolving Loans Converted to Term | 1 | 0
Total loans held for investment | 3,528 | 3,837
Commercial Banking: | Commercial and industrial | Criticized | Criticized nonperforming |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Term Loans by Vintage Year, Year 1 | 0 | 13
Term Loans by Vintage Year, Year 2 | 12 | 53
Term Loans by Vintage Year, Year 3 | 96 | 30
Term Loans by Vintage Year, Year 4 | 41 | 18
Term Loans by Vintage Year, Year 5 | 178 | 123
Prior | 221 | 68
Total Term Loans | 548 | 305
Revolving Loans | 59 | 31
Revolving Loans Converted to Term | 0 | 0
Total loans held for investment | $ 607 | $ 336

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