v3.26.1
Loans and Leases - Loans Held for Investment by Credit Quality Indicator (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Amortized Cost Basis by Origination Year          
Total $ 60,987   $ 60,987   $ 60,732
Year-to-date gross charge-offs          
Total (120) $ (140) (233) $ (264)  
Loans and leases held for investment: | Multi-family          
Amortized Cost Basis by Origination Year          
Originated year one 495   495   45
Originated year two 86   86   15
Originated year three 63   63   738
Originated year four 894   894   7,648
Originated year five 7,394   7,394   7,480
Prior year 17,967   17,967   12,968
Revolving Loans 7   7   6
Revolving Loans Converted to Term Loans 25   25   83
Total 26,931   26,931   28,983
Year-to-date gross charge-offs          
Originated year one     0   0
Originated year two     0   0
Originated year three     0   0
Originated year four     (3)   (59)
Originated year five     (22)   (71)
Prior year     (137)   (155)
Revolving Loans     0   0
Revolving Loans Converted to Term Loans     0   0
Total (81) (105) (162) (185) (285)
Loans and leases held for investment: | Multi-family | Pass          
Amortized Cost Basis by Origination Year          
Originated year one 495   495   45
Originated year two 86   86   15
Originated year three 63   63   592
Originated year four 736   736   5,782
Originated year five 4,858   4,858   5,238
Prior year 11,617   11,617   7,887
Revolving Loans 5   5   4
Revolving Loans Converted to Term Loans 0   0   69
Total 17,860   17,860   19,632
Loans and leases held for investment: | Multi-family | Special Mention          
Amortized Cost Basis by Origination Year          
Originated year one 0   0   0
Originated year two 0   0   0
Originated year three 0   0   0
Originated year four 46   46   754
Originated year five 1,262   1,262   751
Prior year 1,449   1,449   546
Revolving Loans 0   0   0
Revolving Loans Converted to Term Loans 0   0   14
Total 2,757   2,757   2,065
Loans and leases held for investment: | Multi-family | Substandard          
Amortized Cost Basis by Origination Year          
Originated year one 0   0   0
Originated year two 0   0   0
Originated year three 0   0   134
Originated year four 92   92   819
Originated year five 998   998   1,132
Prior year 3,067   3,067   2,938
Revolving Loans 0   0   2
Revolving Loans Converted to Term Loans 25   25   0
Total 4,182   4,182   5,025
Loans and leases held for investment: | Multi-family | Non-accrual          
Amortized Cost Basis by Origination Year          
Originated year one 0   0   0
Originated year two 0   0   0
Originated year three 0   0   12
Originated year four 20   20   293
Originated year five 276   276   359
Prior year 1,834   1,834   1,597
Revolving Loans 2   2   0
Revolving Loans Converted to Term Loans 0   0   0
Total 2,132   2,132   2,261
Loans and leases held for investment: | Commercial real estate          
Amortized Cost Basis by Origination Year          
Originated year one 307   307   489
Originated year two 558   558   404
Originated year three 393   393   1,262
Originated year four 1,036   1,036   1,602
Originated year five 1,457   1,457   1,050
Prior year 3,605   3,605   3,136
Revolving Loans 857   857   1,106
Revolving Loans Converted to Term Loans 31   31   265
Total 8,244   8,244   9,314
Year-to-date gross charge-offs          
Originated year one     0   0
Originated year two     0   0
Originated year three     0   (5)
Originated year four     0   (1)
Originated year five     (18)   (7)
Prior year     (13)   (28)
Revolving Loans     0   0
Revolving Loans Converted to Term Loans     0   0
Total (13) (20) (31) (22) (41)
Loans and leases held for investment: | Commercial real estate | Pass          
Amortized Cost Basis by Origination Year          
Originated year one 305   305   478
Originated year two 543   543   373
Originated year three 323   323   1,053
Originated year four 805   805   1,297
Originated year five 1,101   1,101   955
Prior year 2,645   2,645   2,104
Revolving Loans 684   684   924
Revolving Loans Converted to Term Loans 0   0   95
Total 6,406   6,406   7,279
Loans and leases held for investment: | Commercial real estate | Special Mention          
Amortized Cost Basis by Origination Year          
Originated year one 0   0   10
Originated year two 10   10   10
Originated year three 43   43   50
Originated year four 123   123   88
Originated year five 103   103   5
Prior year 66   66   154
Revolving Loans 0   0   25
Revolving Loans Converted to Term Loans 31   31   10
Total 376   376   352
Loans and leases held for investment: | Commercial real estate | Substandard          
Amortized Cost Basis by Origination Year          
Originated year one 2   2   1
Originated year two 5   5   21
Originated year three 27   27   147
Originated year four 97   97   143
Originated year five 165   165   86
Prior year 629   629   513
Revolving Loans 66   66   124
Revolving Loans Converted to Term Loans 0   0   159
Total 991   991   1,194
Loans and leases held for investment: | Commercial real estate | Non-accrual          
Amortized Cost Basis by Origination Year          
Originated year one 0   0   0
Originated year two 0   0   0
Originated year three 0   0   12
Originated year four 11   11   74
Originated year five 88   88   4
Prior year 265   265   365
Revolving Loans 107   107   33
Revolving Loans Converted to Term Loans 0   0   1
Total 471   471   489
Loans and leases held for investment: | One-to-four family first mortgage          
Amortized Cost Basis by Origination Year          
Originated year one 469   469   939
Originated year two 813   813   289
Originated year three 235   235   426
Originated year four 354   354   2,208
Originated year five 2,079   2,079   792
Prior year 1,737   1,737   892
Revolving Loans 79   79   80
Revolving Loans Converted to Term Loans 1   1   4
Total 5,767   5,767   5,630
Year-to-date gross charge-offs          
Originated year one     0   0
Originated year two     0   0
Originated year three     0   0
Originated year four     0   (2)
Originated year five     (1)   0
Prior year     (1)   (2)
Revolving Loans     0   0
Revolving Loans Converted to Term Loans     0   0
Total (1) (1) (2) (2) (4)
Loans and leases held for investment: | One-to-four family first mortgage | Pass          
Amortized Cost Basis by Origination Year          
Originated year one 469   469   938
Originated year two 812   812   285
Originated year three 230   230   415
Originated year four 343   343   2,178
Originated year five 2,055   2,055   778
Prior year 1,537   1,537   682
Revolving Loans 78   78   78
Revolving Loans Converted to Term Loans 1   1   4
Total 5,525   5,525   5,358
Loans and leases held for investment: | One-to-four family first mortgage | Substandard          
Amortized Cost Basis by Origination Year          
Originated year one 0   0   0
Originated year two 0   0   1
Originated year three 1   1   4
Originated year four 3   3   12
Originated year five 12   12   2
Prior year 166   166   189
Revolving Loans 0   0   0
Revolving Loans Converted to Term Loans 0   0   0
Total 182   182   208
Loans and leases held for investment: | One-to-four family first mortgage | Non-accrual          
Amortized Cost Basis by Origination Year          
Originated year one 0   0   1
Originated year two 1   1   3
Originated year three 4   4   7
Originated year four 8   8   18
Originated year five 12   12   12
Prior year 34   34   21
Revolving Loans 1   1   2
Revolving Loans Converted to Term Loans 0   0   0
Total 60   60   64
Loans and leases held for investment: | Commercial and Industrial          
Amortized Cost Basis by Origination Year          
Originated year one 2,979   2,979   3,639
Originated year two 3,436   3,436   861
Originated year three 766   766   1,956
Originated year four 1,552   1,552   1,590
Originated year five 1,284   1,284   530
Prior year 1,026   1,026   812
Revolving Loans 7,502   7,502   5,588
Revolving Loans Converted to Term Loans 18   18   241
Total 18,563   18,563   15,217
Year-to-date gross charge-offs          
Originated year one     0   (25)
Originated year two     (2)   (1)
Originated year three     0   (32)
Originated year four     (2)   (21)
Originated year five     (14)   (5)
Prior year     (5)   (3)
Revolving Loans     0   0
Revolving Loans Converted to Term Loans     0   0
Total (18) (7) (23) (41) (87)
Loans and leases held for investment: | Commercial and Industrial | Pass          
Amortized Cost Basis by Origination Year          
Originated year one 2,937   2,937   3,638
Originated year two 3,404   3,404   793
Originated year three 698   698   1,876
Originated year four 1,425   1,425   1,513
Originated year five 1,250   1,250   493
Prior year 899   899   739
Revolving Loans 7,223   7,223   5,236
Revolving Loans Converted to Term Loans 18   18   231
Total 17,854   17,854   14,519
Loans and leases held for investment: | Commercial and Industrial | Special Mention          
Amortized Cost Basis by Origination Year          
Originated year one 24   24   0
Originated year two 6   6   42
Originated year three 31   31   7
Originated year four 34   34   21
Originated year five 5   5   1
Prior year 64   64   28
Revolving Loans 114   114   127
Revolving Loans Converted to Term Loans 0   0   0
Total 278   278   226
Loans and leases held for investment: | Commercial and Industrial | Substandard          
Amortized Cost Basis by Origination Year          
Originated year one 18   18   0
Originated year two 25   25   8
Originated year three 19   19   50
Originated year four 71   71   35
Originated year five 21   21   31
Prior year 27   27   16
Revolving Loans 139   139   201
Revolving Loans Converted to Term Loans 0   0   1
Total 320   320   342
Loans and leases held for investment: | Commercial and Industrial | Non-accrual          
Amortized Cost Basis by Origination Year          
Originated year one 0   0   1
Originated year two 1   1   18
Originated year three 18   18   23
Originated year four 22   22   21
Originated year five 8   8   5
Prior year 36   36   29
Revolving Loans 26   26   24
Revolving Loans Converted to Term Loans 0   0   9
Total 111   111   130
Commercial and industrial          
Year-to-date gross charge-offs          
Total (7) $ (7) (15) $ (14)  
Commercial and industrial | Commercial and Industrial          
Amortized Cost Basis by Origination Year          
Total 18,563   18,563   15,217
Commercial and industrial | Other          
Amortized Cost Basis by Origination Year          
Originated year one 30   30   44
Originated year two 22   22   27
Originated year three 19   19   21
Originated year four 17   17   7
Originated year five 26   26   2
Prior year 82   82   31
Revolving Loans 1,280   1,280   1,367
Revolving Loans Converted to Term Loans 6   6   89
Total 1,482   1,482   1,588
Year-to-date gross charge-offs          
Originated year one     0   (10)
Originated year two     0   (2)
Originated year three     0   (7)
Originated year four     (3)   (7)
Originated year five     (2)   0
Prior year     (10)   (6)
Revolving Loans     0   0
Revolving Loans Converted to Term Loans     0   0
Total     (15)   (32)
Commercial and industrial | Other | Pass          
Amortized Cost Basis by Origination Year          
Originated year one 30   30   44
Originated year two 21   21   27
Originated year three 19   19   21
Originated year four 17   17   7
Originated year five 26   26   2
Prior year 81   81   30
Revolving Loans 1,256   1,256   1,336
Revolving Loans Converted to Term Loans 6   6   89
Total 1,456   1,456   1,556
Commercial and industrial | Other | Substandard          
Amortized Cost Basis by Origination Year          
Originated year one         0
Originated year two         0
Originated year three         0
Originated year four         0
Originated year five         0
Prior year         0
Revolving Loans         1
Revolving Loans Converted to Term Loans         0
Total         1
Commercial and industrial | Other | Non-accrual          
Amortized Cost Basis by Origination Year          
Originated year one 0   0   0
Originated year two 1   1   0
Originated year three 0   0   0
Originated year four 0   0   0
Originated year five 0   0   0
Prior year 1   1   1
Revolving Loans 24   24   30
Revolving Loans Converted to Term Loans 0   0   0
Total $ 26   $ 26   $ 31