Quarterly report pursuant to Section 13 or 15(d)

Securities - Maturities of Debt Securities Carried at Fair Value and Held-to-maturity Debt Securities (Details)

v3.24.3
Securities - Maturities of Debt Securities Carried at Fair Value and Held-to-maturity Debt Securities (Details) - USD ($)
$ in Millions
Sep. 30, 2024
Dec. 31, 2023
Debt Securities, Held-to-maturity, Maturity, Amortized Cost, Net [Abstract]    
Due in one year or less, amount $ 581  
Due in one year or less, yield 2.53%  
Due after one year through five years, amount $ 24,327  
Due after one year through five years, yield 1.87%  
Due after five years through ten years, amount $ 98,133  
Due after five years though ten years, yield 1.28%  
Due after ten years, amount $ 444,548  
Due after ten years, yield 2.12%  
Amortized Cost $ 567,589 $ 594,591
Total, yield 1.96%  
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]    
Fair Value $ 325,436 276,852
Held-to-maturity Securities, Debt Maturities, Fair Value [Abstract]    
Due in One Year or Less 575  
Due after One Year through Five Years 22,064  
Due after Five Years through Ten Years 85,415  
Due after Ten Years 373,833  
Held-to-maturity, fair value 481,887 496,597
AFS securities    
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]    
Due in one year or less, amount $ 23,396  
Due in one year or less, yield 3.60%  
Due after one year through five years, amount $ 212,925  
Due after one year through five years, yield 3.87%  
Due after five years through ten years, amount $ 31,007  
Due after five years through ten years, yield 3.62%  
Due after ten years, amount $ 61,100  
Due after ten years, yield 4.94%  
Amount $ 328,428  
Total, yield 4.02%  
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]    
Due in one year or less, amount $ 23,576  
Due after one year through five years, amount 212,108  
Due after five years though ten years, amount 30,498  
Due after ten years, amount 59,254  
Fair Value 325,436  
Mortgage-backed securities    
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]    
Due in one year or less, amount $ 119  
Due in one year or less, yield 4.02%  
Due after one year through five years, amount $ 5,192  
Due after one year through five years, yield 5.02%  
Due after five years through ten years, amount $ 12,098  
Due after five years through ten years, yield 4.11%  
Due after ten years, amount $ 55,146  
Due after ten years, yield 5.04%  
Amount $ 72,555  
Total, yield 4.88%  
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]    
Due in one year or less, amount $ 118  
Due after one year through five years, amount 5,156  
Due after five years though ten years, amount 11,947  
Due after ten years, amount 53,436  
Fair Value 70,657  
Agency    
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]    
Due in one year or less, amount $ 0  
Due in one year or less, yield 0.00%  
Due after one year through five years, amount $ 5  
Due after one year through five years, yield 3.40%  
Due after five years through ten years, amount $ 6  
Due after five years through ten years, yield 3.83%  
Due after ten years, amount $ 35,967  
Due after ten years, yield 4.62%  
Amount $ 35,978  
Total, yield 4.62%  
Debt Securities, Held-to-maturity, Maturity, Amortized Cost, Net [Abstract]    
Due in one year or less, amount $ 0  
Due in one year or less, yield 0.00%  
Due after one year through five years, amount $ 0  
Due after one year through five years, yield 0.00%  
Due after five years through ten years, amount $ 10  
Due after five years though ten years, yield 2.70%  
Due after ten years, amount $ 438,814  
Due after ten years, yield 2.12%  
Amortized Cost $ 438,824 465,456
Total, yield 2.12%  
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]    
Due in one year or less, amount $ 0  
Due after one year through five years, amount 5  
Due after five years though ten years, amount 6  
Due after ten years, amount 34,583  
Fair Value 34,594  
Held-to-maturity Securities, Debt Maturities, Fair Value [Abstract]    
Due in One Year or Less 0  
Due after One Year through Five Years 0  
Due after Five Years through Ten Years 10  
Due after Ten Years 368,936  
Held-to-maturity, fair value 368,946 386,526
Agency-collateralized mortgage obligations    
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]    
Due in one year or less, amount $ 0  
Due in one year or less, yield 0.00%  
Due after one year through five years, amount $ 0  
Due after one year through five years, yield 0.00%  
Due after five years through ten years, amount $ 1  
Due after five years through ten years, yield 1.00%  
Due after ten years, amount $ 16,639  
Due after ten years, yield 5.92%  
Amount $ 16,640  
Total, yield 5.92%  
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]    
Due in one year or less, amount $ 0  
Due after one year through five years, amount 0  
Due after five years though ten years, amount 1  
Due after ten years, amount 16,503  
Fair Value 16,504  
Commercial    
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]    
Due in one year or less, amount $ 119  
Due in one year or less, yield 4.02%  
Due after one year through five years, amount $ 5,187  
Due after one year through five years, yield 5.02%  
Due after five years through ten years, amount $ 12,091  
Due after five years through ten years, yield 4.11%  
Due after ten years, amount $ 1,973  
Due after ten years, yield 3.37%  
Amount $ 19,370  
Total, yield 4.28%  
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]    
Due in one year or less, amount $ 118  
Due after one year through five years, amount 5,149  
Due after five years though ten years, amount 11,940  
Due after ten years, amount 1,790  
Fair Value 18,997  
Non-agency residential    
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]    
Due in one year or less, amount $ 0  
Due in one year or less, yield 0.00%  
Due after one year through five years, amount $ 0  
Due after one year through five years, yield 0.00%  
Due after five years through ten years, amount $ 0  
Due after five years through ten years, yield 0.00%  
Due after ten years, amount $ 567  
Due after ten years, yield 11.94%  
Amount $ 567  
Total, yield 11.94%  
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]    
Due in one year or less, amount $ 0  
Due after one year through five years, amount 2  
Due after five years though ten years, amount 0  
Due after ten years, amount 560  
Fair Value 562  
U.S. Treasury and government agencies    
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]    
Due in one year or less, amount $ 2,819  
Due in one year or less, yield 4.64%  
Due after one year through five years, amount $ 197,391  
Due after one year through five years, yield 3.87%  
Due after five years through ten years, amount $ 13,450  
Due after five years through ten years, yield 2.78%  
Due after ten years, amount $ 36  
Due after ten years, yield 3.95%  
Amount $ 213,696  
Total, yield 3.81%  
Debt Securities, Held-to-maturity, Maturity, Amortized Cost, Net [Abstract]    
Due in one year or less, amount $ 490  
Due in one year or less, yield 2.71%  
Due after one year through five years, amount $ 23,190  
Due after one year through five years, yield 1.84%  
Due after five years through ten years, amount $ 98,003  
Due after five years though ten years, yield 1.28%  
Due after ten years, amount $ 0  
Due after ten years, yield 0.00%  
Amortized Cost $ 121,683 121,645
Total, yield 1.39%  
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]    
Due in one year or less, amount $ 2,815  
Due after one year through five years, amount 196,614  
Due after five years though ten years, amount 13,116  
Due after ten years, amount 34  
Fair Value 212,579  
Held-to-maturity Securities, Debt Maturities, Fair Value [Abstract]    
Due in One Year or Less 485  
Due after One Year through Five Years 20,961  
Due after Five Years through Ten Years 85,308  
Due after Ten Years 0  
Held-to-maturity, fair value 106,754 103,682
Non-U.S. securities    
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]    
Due in one year or less, amount $ 18,915  
Due in one year or less, yield 3.39%  
Due after one year through five years, amount $ 4,962  
Due after one year through five years, yield 1.84%  
Due after five years through ten years, amount $ 4,194  
Due after five years through ten years, yield 5.01%  
Due after ten years, amount $ 1,705  
Due after ten years, yield 4.44%  
Amount $ 29,776  
Total, yield 3.42%  
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]    
Due in one year or less, amount $ 19,103  
Due after one year through five years, amount 4,968  
Due after five years though ten years, amount 4,193  
Due after ten years, amount 1,703  
Fair Value 29,967  
Other taxable securities    
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]    
Due in one year or less, amount $ 525  
Due in one year or less, yield 6.16%  
Due after one year through five years, amount $ 1,803  
Due after one year through five years, yield 5.78%  
Due after five years through ten years, amount $ 234  
Due after five years through ten years, yield 4.25%  
Due after ten years, amount $ 75  
Due after ten years, yield 2.95%  
Amount $ 2,637  
Total, yield 5.64%  
Debt Securities, Held-to-maturity, Maturity, Amortized Cost, Net [Abstract]    
Due in one year or less, amount $ 91  
Due in one year or less, yield 1.59%  
Due after one year through five years, amount $ 1,137  
Due after one year through five years, yield 2.55%  
Due after five years through ten years, amount $ 120  
Due after five years though ten years, yield 3.37%  
Due after ten years, amount $ 5,734  
Due after ten years, yield 2.53%  
Amortized Cost $ 7,082 7,490
Total, yield 2.54%  
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]    
Due in one year or less, amount $ 525  
Due after one year through five years, amount 1,799  
Due after five years though ten years, amount 218  
Due after ten years, amount 70  
Fair Value 2,612  
Held-to-maturity Securities, Debt Maturities, Fair Value [Abstract]    
Due in One Year or Less 90  
Due after One Year through Five Years 1,103  
Due after Five Years through Ten Years 97  
Due after Ten Years 4,897  
Held-to-maturity, fair value 6,187 $ 6,389
Tax-exempt securities    
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]    
Due in one year or less, amount $ 1,018  
Due in one year or less, yield 3.13%  
Due after one year through five years, amount $ 3,577  
Due after one year through five years, yield 3.65%  
Due after five years through ten years, amount $ 1,031  
Due after five years through ten years, yield 3.15%  
Due after ten years, amount $ 4,138  
Due after ten years, yield 3.84%  
Amount $ 9,764  
Total, yield 3.62%  
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]    
Due in one year or less, amount $ 1,015  
Due after one year through five years, amount 3,571  
Due after five years though ten years, amount 1,024  
Due after ten years, amount 4,011  
Fair Value $ 9,621