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)

v3.23.3
Securities - Maturities of Debt Securities Carried at Fair Value and Held-to-maturity Debt Securities (Details) - USD ($)
$ in Millions
Sep. 30, 2023
Dec. 31, 2022
Debt Securities, Held-to-maturity, Maturity, Amortized Cost, Net [Abstract]    
Due in one year or less, amount $ 42  
Due in one year or less, yield 5.82%  
Due after one year through five years, amount $ 5,820  
Due after one year through five years, yield 1.95%  
Due after five years through ten years, amount $ 117,359  
Due after five years though ten years, yield 1.37%  
Due after ten years, amount $ 480,144  
Due after ten years, yield 2.12%  
Amortized Cost $ 603,365 $ 632,863
Total, yield 1.97%  
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]    
Fair Value $ 175,540 229,994
Held-to-maturity Securities, Debt Maturities, Fair Value [Abstract]    
Due in One Year or Less 42  
Due after One Year through Five Years 5,322  
Due after Five Years through Ten Years 94,349  
Due after Ten Years 372,048  
Held-to-maturity, fair value 471,761 524,267
AFS securities    
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]    
Due in one year or less, amount $ 57,164  
Due in one year or less, yield 4.22%  
Due after one year through five years, amount $ 58,776  
Due after one year through five years, yield 3.02%  
Due after five years through ten years, amount $ 32,581  
Due after five years through ten years, yield 2.77%  
Due after ten years, amount $ 31,537  
Due after ten years, yield 3.71%  
Amount $ 180,058  
Total, yield 3.48%  
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]    
Due in one year or less, amount $ 57,150  
Due after one year through five years, amount 57,960  
Due after five years though ten years, amount 31,684  
Due after ten years, amount 28,746  
Fair Value 175,540  
Mortgage-backed securities    
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 $ 1,133  
Due after one year through five years, yield 3.07%  
Due after five years through ten years, amount $ 4,650  
Due after five years through ten years, yield 2.61%  
Due after ten years, amount $ 26,673  
Due after ten years, yield 3.60%  
Amount $ 32,456  
Total, yield 3.44%  
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]    
Due in one year or less, amount $ 1  
Due after one year through five years, amount 1,098  
Due after five years though ten years, amount 4,385  
Due after ten years, amount 24,140  
Fair Value 29,624  
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 $ 4  
Due after one year through five years, yield 3.75%  
Due after five years through ten years, amount $ 31  
Due after five years through ten years, yield 5.35%  
Due after ten years, amount $ 22,400  
Due after ten years, yield 3.53%  
Amount $ 22,435  
Total, yield 3.53%  
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 $ 12  
Due after five years though ten years, yield 2.75%  
Due after ten years, amount $ 474,088  
Due after ten years, yield 2.12%  
Amortized Cost $ 474,100 503,233
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 4  
Due after five years though ten years, amount 31  
Due after ten years, amount 20,469  
Fair Value 20,504  
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 367,200  
Held-to-maturity, fair value 367,210 415,914
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 $ 0  
Due after five years through ten years, yield 0.00%  
Due after ten years, amount $ 1,964  
Due after ten years, yield 2.79%  
Amount $ 1,964  
Total, yield 2.79%  
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 0  
Due after ten years, amount 1,698  
Fair Value 1,698  
Commercial    
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 $ 1,129  
Due after one year through five years, yield 3.06%  
Due after five years through ten years, amount $ 4,619  
Due after five years through ten years, yield 2.59%  
Due after ten years, amount $ 1,574  
Due after ten years, yield 2.45%  
Amount $ 7,322  
Total, yield 2.63%  
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]    
Due in one year or less, amount $ 1  
Due after one year through five years, amount 1,092  
Due after five years though ten years, amount 4,354  
Due after ten years, amount 1,305  
Fair Value 6,752  
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 $ 735  
Due after ten years, yield 10.18%  
Amount $ 735  
Total, yield 10.18%  
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 668  
Fair Value 670  
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 $ 37,773  
Due in one year or less, yield 5.23%  
Due after one year through five years, amount $ 45,637  
Due after one year through five years, yield 3.05%  
Due after five years through ten years, amount $ 22,437  
Due after five years through ten years, yield 2.33%  
Due after ten years, amount $ 39  
Due after ten years, yield 3.89%  
Amount $ 105,886  
Total, yield 3.67%  
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 $ 4,558  
Due after one year through five years, yield 1.80%  
Due after five years through ten years, amount $ 117,075  
Due after five years though ten years, yield 1.37%  
Due after ten years, amount $ 0  
Due after ten years, yield 0.00%  
Amortized Cost $ 121,633 121,597
Total, yield 1.39%  
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]    
Due in one year or less, amount $ 37,776  
Due after one year through five years, amount 44,973  
Due after five years though ten years, amount 21,910  
Due after ten years, amount 35  
Fair Value 104,694  
Held-to-maturity Securities, Debt Maturities, Fair Value [Abstract]    
Due in One Year or Less 0  
Due after One Year through Five Years 4,153  
Due after Five Years through Ten Years 94,129  
Due after Ten Years 0  
Held-to-maturity, fair value 98,282 101,338
Non-U.S. securities    
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]    
Due in one year or less, amount $ 17,748  
Due in one year or less, yield 2.04%  
Due after one year through five years, amount $ 5,850  
Due after one year through five years, yield 1.17%  
Due after five years through ten years, amount $ 3,203  
Due after five years through ten years, yield 5.40%  
Due after ten years, amount $ 678  
Due after ten years, yield 5.26%  
Amount $ 27,479  
Total, yield 2.33%  
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]    
Due in one year or less, amount $ 17,737  
Due after one year through five years, amount 5,834  
Due after five years though ten years, amount 3,199  
Due after ten years, amount 678  
Fair Value 27,448  
Other taxable securities    
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]    
Due in one year or less, amount $ 409  
Due in one year or less, yield 5.60%  
Due after one year through five years, amount $ 2,355  
Due after one year through five years, yield 6.08%  
Due after five years through ten years, amount $ 294  
Due after five years through ten years, yield 3.00%  
Due after ten years, amount $ 213  
Due after ten years, yield 3.60%  
Amount $ 3,271  
Total, yield 5.59%  
Debt Securities, Held-to-maturity, Maturity, Amortized Cost, Net [Abstract]    
Due in one year or less, amount $ 42  
Due in one year or less, yield 5.82%  
Due after one year through five years, amount $ 1,262  
Due after one year through five years, yield 2.50%  
Due after five years through ten years, amount $ 272  
Due after five years though ten years, yield 3.29%  
Due after ten years, amount $ 6,056  
Due after ten years, yield 2.49%  
Amortized Cost $ 7,632 8,033
Total, yield 2.54%  
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]    
Due in one year or less, amount $ 407  
Due after one year through five years, amount 2,330  
Due after five years though ten years, amount 248  
Due after ten years, amount 198  
Fair Value 3,183  
Held-to-maturity Securities, Debt Maturities, Fair Value [Abstract]    
Due in One Year or Less 42  
Due after One Year through Five Years 1,169  
Due after Five Years through Ten Years 210  
Due after Ten Years 4,848  
Held-to-maturity, fair value 6,269 $ 7,015
Tax-exempt securities    
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]    
Due in one year or less, amount $ 1,234  
Due in one year or less, yield 4.13%  
Due after one year through five years, amount $ 3,801  
Due after one year through five years, yield 3.64%  
Due after five years through ten years, amount $ 1,997  
Due after five years through ten years, yield 3.85%  
Due after ten years, amount $ 3,934  
Due after ten years, yield 4.23%  
Amount $ 10,966  
Total, yield 3.95%  
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]    
Due in one year or less, amount $ 1,229  
Due after one year through five years, amount 3,725  
Due after five years though ten years, amount 1,942  
Due after ten years, amount 3,695  
Fair Value $ 10,591