v3.26.1
Investment Securities - Schedule of Investments Classified by Contractual Maturity Date (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Amount          
Total available-for-sale securities $ 23,253   $ 23,253   $ 22,973
Due in one year or less 535   535   465
Due after one year through five years 4,817   4,817   4,228
Due after five years through ten years 3,620   3,620   3,581
Due after ten years $ 14,281   $ 14,281   $ 14,699
Yield          
Total 3.00%   3.00%   3.00%
Due in one year or less 2.70%   2.70%   2.50%
Due after one year through five years 3.40%   3.40%   3.40%
Due after five years through ten years 3.00%   3.00%   2.90%
Due after ten years 2.90%   2.90%   2.90%
Amortized cost basis of available-for-sale securities          
Amortized cost basis $ 26,222   $ 26,222   $ 25,825
Due in one year or less 539   539   468
Due after one year through five years 4,976   4,976   4,298
Due after five years through ten years 4,049   4,049   3,968
Due after ten years 16,658   16,658   17,091
Amount          
Amortized cost basis 4,286   4,286   4,371
Due in one year or less 0   0   0
Due after one year through five years 28   28   40
Due after five years through ten years 13   13   16
Due after ten years $ 4,245   $ 4,245   $ 4,315
Yield          
Total 3.10%   3.10%   3.00%
Due in one year or less 0.00%   0.00%   0.00%
Due after one year through five years 5.00%   5.00%   5.00%
Due after five years through ten years 5.70%   5.70%   5.70%
Due after ten years 3.10%   3.10%   3.00%
Cash equivalents $ 100   $ 100   $ 107
Taxable interest 221 $ 228 435 $ 438  
Taxable dividends 4 5 8 10  
Interest and dividends exempt from U.S. federal income tax 6 6 11 12  
Interest and dividends on investment securities and other earning assets 231 $ 239 454 $ 460  
U.S. Treasury and federal agencies          
Amount          
Total available-for-sale securities 2,515   2,515   2,279
Due in one year or less 68   68   84
Due after one year through five years 2,169   2,169   1,771
Due after five years through ten years 278   278   424
Due after ten years $ 0   $ 0   $ 0
Yield          
Total 3.50%   3.50%   3.40%
Due in one year or less 1.50%   1.50%   0.80%
Due after one year through five years 3.70%   3.70%   3.90%
Due after five years through ten years 2.30%   2.30%   2.00%
Due after ten years 0.00%   0.00%   0.00%
Amortized cost basis of available-for-sale securities          
Amortized cost basis $ 2,579   $ 2,579   $ 2,308
U.S. States and political subdivisions          
Amount          
Total available-for-sale securities 479   479   551
Due in one year or less 33   33   48
Due after one year through five years 42   42   50
Due after five years through ten years 38   38   65
Due after ten years $ 366   $ 366   $ 388
Yield          
Total 3.30%   3.30%   3.40%
Due in one year or less 5.40%   5.40%   4.80%
Due after one year through five years 3.50%   3.50%   3.70%
Due after five years through ten years 4.40%   4.40%   4.30%
Due after ten years 3.00%   3.00%   3.10%
Amortized cost basis of available-for-sale securities          
Amortized cost basis $ 543   $ 543   $ 624
Foreign government          
Amount          
Total available-for-sale securities 192   192   188
Due in one year or less 25   25   14
Due after one year through five years 76   76   75
Due after five years through ten years 91   91   99
Due after ten years $ 0   $ 0   $ 0
Yield          
Total 2.80%   2.80%   2.80%
Due in one year or less 2.30%   2.30%   2.00%
Due after one year through five years 2.30%   2.30%   2.30%
Due after five years through ten years 3.40%   3.40%   3.30%
Due after ten years 0.00%   0.00%   0.00%
Amortized cost basis of available-for-sale securities          
Amortized cost basis $ 194   $ 194   $ 191
Agency mortgage-backed residential          
Amount          
Total available-for-sale securities 12,789   12,789   12,901
Due in one year or less 0   0   0
Due after one year through five years 1   1   1
Due after five years through ten years 0   0   0
Due after ten years $ 12,788   $ 12,788   $ 12,900
Yield          
Total 3.00%   3.00%   2.90%
Due in one year or less 0.00%   0.00%   0.00%
Due after one year through five years 2.80%   2.80%   2.80%
Due after five years through ten years 0.00%   0.00%   0.00%
Due after ten years 3.00%   3.00%   2.90%
Amortized cost basis of available-for-sale securities          
Amortized cost basis $ 14,903   $ 14,903   $ 14,966
Amount          
Amortized cost basis 1,364   1,364   1,303
Due in one year or less 0   0   0
Due after one year through five years 0   0   0
Due after five years through ten years 0   0   0
Due after ten years $ 1,364   $ 1,364   $ 1,303
Yield          
Total 3.60%   3.60%   3.50%
Due in one year or less 0.00%   0.00%   0.00%
Due after one year through five years 0.00%   0.00%   0.00%
Due after five years through ten years 0.00%   0.00%   0.00%
Due after ten years 3.60%   3.60%   3.50%
Hedged liability, fair value hedge, cumulative increase (decrease) $ 80   $ 80    
Hedged asset, fair value hedge, cumulative increase (decrease)         $ 13
Mortgage-backed residential          
Amount          
Total available-for-sale securities 188   188   198
Due in one year or less 0   0   0
Due after one year through five years 0   0   0
Due after five years through ten years 0   0   0
Due after ten years $ 188   $ 188   $ 198
Yield          
Total 2.70%   2.70%   2.70%
Due in one year or less 0.00%   0.00%   0.00%
Due after one year through five years 0.00%   0.00%   0.00%
Due after five years through ten years 0.00%   0.00%   0.00%
Due after ten years 2.70%   2.70%   2.70%
Amortized cost basis of available-for-sale securities          
Amortized cost basis $ 221   $ 221   $ 230
Amount          
Amortized cost basis 2,886   2,886   3,018
Due in one year or less 0   0   0
Due after one year through five years 4   4   5
Due after five years through ten years 1   1   1
Due after ten years $ 2,881   $ 2,881   $ 3,012
Yield          
Total 2.80%   2.80%   2.80%
Due in one year or less 0.00%   0.00%   0.00%
Due after one year through five years 2.90%   2.90%   2.90%
Due after five years through ten years 5.00%   5.00%   5.50%
Due after ten years 2.80%   2.80%   2.80%
Agency mortgage-backed commercial          
Amount          
Total available-for-sale securities $ 5,137   $ 5,137   $ 4,932
Due in one year or less 150   150   87
Due after one year through five years 1,709   1,709   1,453
Due after five years through ten years 2,464   2,464   2,314
Due after ten years $ 814   $ 814   $ 1,078
Yield          
Total 2.80%   2.80%   2.70%
Due in one year or less 3.00%   3.00%   3.40%
Due after one year through five years 3.40%   3.40%   3.50%
Due after five years through ten years 2.40%   2.40%   2.40%
Due after ten years 2.30%   2.30%   2.30%
Amortized cost basis of available-for-sale securities          
Amortized cost basis $ 5,770   $ 5,770   $ 5,540
Yield          
Hedged liability, fair value hedge, cumulative increase (decrease) 19   19    
Hedged asset, fair value hedge, cumulative increase (decrease)         33
Asset-backed          
Amount          
Total available-for-sale securities 1   1   12
Due in one year or less 0   0   0
Due after one year through five years 1   1   12
Due after five years through ten years 0   0   0
Due after ten years $ 0   $ 0   $ 0
Yield          
Total 1.50%   1.50%   1.50%
Due in one year or less 0.00%   0.00%   0.00%
Due after one year through five years 1.50%   1.50%   1.50%
Due after five years through ten years 0.00%   0.00%   0.00%
Due after ten years 0.00%   0.00%   0.00%
Amortized cost basis of available-for-sale securities          
Amortized cost basis $ 1   $ 1   $ 12
Amount          
Amortized cost basis 36   36   50
Due in one year or less 0   0   0
Due after one year through five years 24   24   35
Due after five years through ten years 12   12   15
Due after ten years $ 0   $ 0   $ 0
Yield          
Total 5.40%   5.40%   5.40%
Due in one year or less 0.00%   0.00%   0.00%
Due after one year through five years 5.30%   5.30%   5.30%
Due after five years through ten years 5.70%   5.70%   5.70%
Due after ten years 0.00%   0.00%   0.00%
Corporate debt          
Amount          
Total available-for-sale securities $ 1,952   $ 1,952   $ 1,912
Due in one year or less 259   259   232
Due after one year through five years 819   819   866
Due after five years through ten years 749   749   679
Due after ten years $ 125   $ 125   $ 135
Yield          
Total 3.70%   3.70%   3.40%
Due in one year or less 2.60%   2.60%   2.40%
Due after one year through five years 2.60%   2.60%   2.50%
Due after five years through ten years 5.00%   5.00%   4.60%
Due after ten years 5.40%   5.40%   5.50%
Amortized cost basis of available-for-sale securities          
Amortized cost basis $ 2,011   $ 2,011   $ 1,954