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
Sep. 30, 2021
Dec. 31, 2020
Available-for-sale securities, amortized cost:    
Under 1 year $ 354 $ 308
After 1 year through 5 years 1,665 1,145
After 5 years through 10 years 2,935 1,607
After 10 years 20,699 13,115
Total available-for-sale securities 25,653 16,175
Available-for-sale securities, fair value:    
Under 1 year 351 304
After 1 year through 5 years 1,668 1,154
After 5 years through 10 years 2,962 1,654
After 10 years 20,673 13,373
Total available-for-sale securities 25,654 16,485
Held-to-maturity securities, amortized cost:    
After 1 year through 5 years 80 160
After 5 years through 10 years 70 131
After 10 years 12,305 8,570
Total held-to-maturity securities 12,455 8,861
Held-to-maturity securities, fair value:    
After 1 year through 5 years 83 169
After 5 years through 10 years 72 138
After 10 years 12,464 8,948
Total held-to-maturity securities $ 12,619 $ 9,255