Quarterly report pursuant to Section 13 or 15(d)

INVESTMENT SECURITIES AND OTHER SECURITIES - Contractual Maturities (Details)

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INVESTMENT SECURITIES AND OTHER SECURITIES - Contractual Maturities (Details) - USD ($)
$ in Millions
Mar. 31, 2024
Dec. 31, 2023
Available-for-sale securities, amortized cost:    
Under 1 year $ 5,093 $ 3,380
After 1 year through 5 years 2,995 2,484
After 5 years through 10 years 2,312 2,392
After 10 years 19,894 20,309
Total available-for-sale securities 30,294 28,565
Available-for-sale securities, fair value:    
Under 1 year 5,084 3,372
After 1 year through 5 years 2,842 2,338
After 5 years through 10 years 2,192 2,255
After 10 years 16,683 17,340
Total available-for-sale securities 26,801 25,305
Held-to-maturity securities, amortized cost:    
Under 1 year 0 1
After 1 year through 5 years 42 48
After 5 years through 10 years 66 69
After 10 years 15,308 15,632
Total held-to-maturity securities 15,416 15,750
Held-to-maturity securities, fair value:    
Under 1 year 0 1
After 1 year through 5 years 40 46
After 5 years through 10 years 62 66
After 10 years 13,069 13,605
Total held-to-maturity securities $ 13,171 $ 13,718