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Loans - Commercial Banking: Risk Profile by Internal Risk Rating (Details) - USD ($) $ in Millions | Sep. 30, 2024 | Dec. 31, 2023
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Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Total loans held for investment | $ 320,243 | $ 320,472
Commercial Banking: |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Term Loans by Vintage Year, Year 1 | 5,512 | 10,556
Term Loans by Vintage Year, Year 2 | 8,643 | 18,879
Term Loans by Vintage Year, Year 3 | 16,288 | 11,282
Term Loans by Vintage Year, Year 4 | 9,298 | 5,124
Term Loans by Vintage Year, Year 5 | 4,245 | 5,444
Prior | 13,973 | 10,271
Total Term Loans | 57,959 | 61,556
Revolving Loans | 28,584 | 28,740
Revolving Loans Converted to Term | 291 | 192
Total loans held for investment | 86,834 | 90,488
Commercial Banking: | Commercial and multifamily real estate |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Term Loans by Vintage Year, Year 1 | 1,338 | 3,281
Term Loans by Vintage Year, Year 2 | 2,391 | 6,185
Term Loans by Vintage Year, Year 3 | 5,182 | 3,603
Term Loans by Vintage Year, Year 4 | 2,700 | 1,303
Term Loans by Vintage Year, Year 5 | 1,176 | 2,614
Prior | 6,485 | 4,737
Total Term Loans | 19,272 | 21,723
Revolving Loans | 12,780 | 12,698
Revolving Loans Converted to Term | 147 | 25
Total loans held for investment | 32,199 | 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 | 1,262 | 3,068
Term Loans by Vintage Year, Year 2 | 2,300 | 4,665
Term Loans by Vintage Year, Year 3 | 3,643 | 2,773
Term Loans by Vintage Year, Year 4 | 2,265 | 1,019
Term Loans by Vintage Year, Year 5 | 965 | 2,104
Prior | 5,096 | 3,670
Total Term Loans | 15,531 | 17,299
Revolving Loans | 12,591 | 12,565
Revolving Loans Converted to Term | 50 | 25
Total loans held for investment | 28,172 | 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 | 91 | 1,494
Term Loans by Vintage Year, Year 3 | 1,525 | 706
Term Loans by Vintage Year, Year 4 | 294 | 284
Term Loans by Vintage Year, Year 5 | 128 | 463
Prior | 1,048 | 904
Total Term Loans | 3,139 | 3,999
Revolving Loans | 161 | 133
Revolving Loans Converted to Term | 97 | 0
Total loans held for investment | 3,397 | 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 | 23 | 65
Term Loans by Vintage Year, Year 2 | 0 | 26
Term Loans by Vintage Year, Year 3 | 14 | 124
Term Loans by Vintage Year, Year 4 | 141 | 0
Term Loans by Vintage Year, Year 5 | 83 | 47
Prior | 341 | 163
Total Term Loans | 602 | 425
Revolving Loans | 28 | 0
Revolving Loans Converted to Term | 0 | 0
Total loans held for investment | 630 | 425
Commercial Banking: | Commercial and industrial |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Term Loans by Vintage Year, Year 1 | 4,174 | 7,275
Term Loans by Vintage Year, Year 2 | 6,252 | 12,694
Term Loans by Vintage Year, Year 3 | 11,106 | 7,679
Term Loans by Vintage Year, Year 4 | 6,598 | 3,821
Term Loans by Vintage Year, Year 5 | 3,069 | 2,830
Prior | 7,488 | 5,534
Total Term Loans | 38,687 | 39,833
Revolving Loans | 15,804 | 16,042
Revolving Loans Converted to Term | 144 | 167
Total loans held for investment | 54,635 | 56,042
Commercial Banking: | Commercial and industrial | Noncriticized |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Term Loans by Vintage Year, Year 1 | 4,106 | 6,909
Term Loans by Vintage Year, Year 2 | 6,046 | 11,935
Term Loans by Vintage Year, Year 3 | 10,197 | 6,994
Term Loans by Vintage Year, Year 4 | 5,770 | 3,566
Term Loans by Vintage Year, Year 5 | 2,762 | 2,359
Prior | 7,001 | 5,117
Total Term Loans | 35,882 | 36,880
Revolving Loans | 14,637 | 14,822
Revolving Loans Converted to Term | 144 | 167
Total loans held for investment | 50,663 | 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 | 6 | 353
Term Loans by Vintage Year, Year 2 | 193 | 706
Term Loans by Vintage Year, Year 3 | 781 | 655
Term Loans by Vintage Year, Year 4 | 811 | 237
Term Loans by Vintage Year, Year 5 | 118 | 348
Prior | 367 | 349
Total Term Loans | 2,276 | 2,648
Revolving Loans | 978 | 1,189
Revolving Loans Converted to Term | 0 | 0
Total loans held for investment | 3,254 | 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 | 62 | 13
Term Loans by Vintage Year, Year 2 | 13 | 53
Term Loans by Vintage Year, Year 3 | 128 | 30
Term Loans by Vintage Year, Year 4 | 17 | 18
Term Loans by Vintage Year, Year 5 | 189 | 123
Prior | 120 | 68
Total Term Loans | 529 | 305
Revolving Loans | 189 | 31
Revolving Loans Converted to Term | 0 | 0
Total loans held for investment | $ 718 | $ 336

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