v3.26.3
Investment Securities - Amortized Cost and Estimated Fair Value by Contractual Maturity (Details) - USD ($)
$ in Millions
 9 Months Ended
Sep. 30, 2026
Dec. 31, 2025
Available-for-sale securities, Amortized cost    
Due in one year or less $ 25,159  
Due after one year through five years 316,887  
Due after five years through 10 years 76,784  
Due after 10 years 144,560  
Amortized cost 563,390  
Available-for-sale securities, Fair value    
Due in one year or less 25,137  
Due after one year through five years 310,828  
Due after five years through 10 years 74,528  
Due after 10 years 136,698  
Fair value $ 547,191 $ 507,198
Available-for-sale securities, Average yield    
Due in one year or less 4.10%  
Due after one year through five years 4.22%  
Due after five years through 10 years 4.32%  
Due after 10 years 4.95%  
Average yield 4.42%  
Total held-to-maturity securities, Amortized cost    
Due in one year or less $ 30,290  
Due after one year through five years 133,862  
Due after five years through 10 years 11,986  
Due after 10 years 98,466  
Amortized cost 274,604  
Total held-to-maturity securities, Fair value    
Due in one year or less 30,102  
Due after one year through five years 123,446  
Due after five years through 10 years 11,389  
Due after 10 years 83,796  
Fair value $ 248,733 253,344
Total held-to-maturity securities, Average yield    
Due in one year or less 3.82%  
Due after one year through five years 2.52%  
Due after five years through 10 years 4.00%  
Due after 10 years 3.15%  
Average yield 2.96%  
Supplemental information    
Available for sale securities allowance for credit losses $ 7  
Unallocated portfolio layer fair value hedge basis adjustments (3,200)  
Held-to-maturity securities allowance for credit losses $ 40  
US government agencies and US government sponsored enterprises residential MBS estimated duration 8 years  
Agency residential collateralized mortgage obligations estimated duration 6 years  
Nonagency residential collateralized mortgage obligations estimated duration 5 years  
Minimum    
Supplemental information    
Due period of mortgage-backed securities and collateralized mortgage obligations 10 years  
Mortgage-backed securities    
Available-for-sale securities, Amortized cost    
Due in one year or less $ 543  
Due after one year through five years 12,044  
Due after five years through 10 years 4,415  
Due after 10 years 92,042  
Amortized cost 109,044  
Available-for-sale securities, Fair value    
Due in one year or less 541  
Due after one year through five years 11,827  
Due after five years through 10 years 4,298  
Due after 10 years 86,976  
Fair value $ 103,642 101,447
Available-for-sale securities, Average yield    
Due in one year or less 3.38%  
Due after one year through five years 4.64%  
Due after five years through 10 years 4.61%  
Due after 10 years 4.97%  
Average yield 4.91%  
Total held-to-maturity securities, Amortized cost    
Due in one year or less $ 260  
Due after one year through five years 9,143  
Due after five years through 10 years 4,669  
Due after 10 years 80,253  
Amortized cost 94,325  
Total held-to-maturity securities, Fair value    
Due in one year or less 259  
Due after one year through five years 8,417  
Due after five years through 10 years 4,139  
Due after 10 years 66,716  
Fair value $ 79,531 93,186
Total held-to-maturity securities, Average yield    
Due in one year or less 2.38%  
Due after one year through five years 2.45%  
Due after five years through 10 years 3.39%  
Due after 10 years 2.87%  
Average yield 2.86%  
U.S. Treasury and government agencies    
Available-for-sale securities, Amortized cost    
Due in one year or less $ 12,802  
Due after one year through five years 277,017  
Due after five years through 10 years 59,030  
Due after 10 years 6,399  
Amortized cost 355,248  
Available-for-sale securities, Fair value    
Due in one year or less 12,786  
Due after one year through five years 271,702  
Due after five years through 10 years 57,382  
Due after 10 years 5,855  
Fair value $ 347,725 315,822
Available-for-sale securities, Average yield    
Due in one year or less 4.10%  
Due after one year through five years 4.17%  
Due after five years through 10 years 4.39%  
Due after 10 years 4.88%  
Average yield 4.22%  
Total held-to-maturity securities, Amortized cost    
Due in one year or less $ 30,030  
Due after one year through five years 124,078  
Due after five years through 10 years 717  
Due after 10 years 0  
Amortized cost 154,825  
Total held-to-maturity securities, Fair value    
Due in one year or less 29,843  
Due after one year through five years 114,410  
Due after five years through 10 years 660  
Due after 10 years 0  
Fair value $ 144,913 126,447
Total held-to-maturity securities, Average yield    
Due in one year or less 3.83%  
Due after one year through five years 2.53%  
Due after five years through 10 years 2.78%  
Due after 10 years 0.00%  
Average yield 2.78%  
Obligations of U.S. states and municipalities    
Available-for-sale securities, Amortized cost    
Due in one year or less $ 1  
Due after one year through five years 18  
Due after five years through 10 years 132  
Due after 10 years 18,185  
Amortized cost 18,336  
Available-for-sale securities, Fair value    
Due in one year or less 1  
Due after one year through five years 17  
Due after five years through 10 years 119  
Due after 10 years 15,916  
Fair value $ 16,053 20,240
Available-for-sale securities, Average yield    
Due in one year or less 3.23%  
Due after one year through five years 4.07%  
Due after five years through 10 years 3.92%  
Due after 10 years 5.05%  
Average yield 5.04%  
Total held-to-maturity securities, Amortized cost    
Due in one year or less $ 0  
Due after one year through five years 147  
Due after five years through 10 years 176  
Due after 10 years 7,642  
Amortized cost 7,965  
Total held-to-maturity securities, Fair value    
Due in one year or less 0  
Due after one year through five years 127  
Due after five years through 10 years 163  
Due after 10 years 6,524  
Fair value $ 6,814 8,008
Total held-to-maturity securities, Average yield    
Due in one year or less 0.00%  
Due after one year through five years 2.48%  
Due after five years through 10 years 4.19%  
Due after 10 years 4.06%  
Average yield 4.04%  
Non-U.S. government debt securities    
Available-for-sale securities, Amortized cost    
Due in one year or less $ 11,754  
Due after one year through five years 27,348  
Due after five years through 10 years 11,737  
Due after 10 years 0  
Amortized cost 50,839  
Available-for-sale securities, Fair value    
Due in one year or less 11,756  
Due after one year through five years 26,833  
Due after five years through 10 years 11,257  
Due after 10 years 0  
Fair value $ 49,846 45,655
Available-for-sale securities, Average yield    
Due in one year or less 4.11%  
Due after one year through five years 4.44%  
Due after five years through 10 years 3.70%  
Due after 10 years 0.00%  
Average yield 4.19%  
Corporate debt securities    
Available-for-sale securities, Amortized cost    
Due in one year or less $ 7  
Due after one year through five years 213  
Due after five years through 10 years 0  
Due after 10 years 0  
Amortized cost 220  
Available-for-sale securities, Fair value    
Due in one year or less 2  
Due after one year through five years 206  
Due after five years through 10 years 0  
Due after 10 years 0  
Fair value $ 208 $ 128
Available-for-sale securities, Average yield    
Due in one year or less 17.50%  
Due after one year through five years 14.31%  
Due after five years through 10 years 0.00%  
Due after 10 years 0.00%  
Average yield 14.41%  
Asset-backed securities    
Available-for-sale securities, Amortized cost    
Due in one year or less $ 52  
Due after one year through five years 247  
Due after five years through 10 years 1,470  
Due after 10 years 27,934  
Amortized cost 29,703  
Available-for-sale securities, Fair value    
Due in one year or less 51  
Due after one year through five years 243  
Due after five years through 10 years 1,472  
Due after 10 years 27,951  
Fair value $ 29,717  
Available-for-sale securities, Average yield    
Due in one year or less 4.84%  
Due after one year through five years 5.36%  
Due after five years through 10 years 5.65%  
Due after 10 years 4.84%  
Average yield 4.88%  
Total held-to-maturity securities, Amortized cost    
Due in one year or less $ 0  
Due after one year through five years 494  
Due after five years through 10 years 6,424  
Due after 10 years 10,571  
Amortized cost 17,489  
Total held-to-maturity securities, Fair value    
Due in one year or less 0  
Due after one year through five years 492  
Due after five years through 10 years 6,427  
Due after 10 years 10,556  
Fair value $ 17,475  
Total held-to-maturity securities, Average yield    
Due in one year or less 0.00%  
Due after one year through five years 3.17%  
Due after five years through 10 years 4.58%  
Due after 10 years 4.65%  
Average yield 4.58%