Annual report pursuant to Section 13 and 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
Dec. 31, 2021
Dec. 31, 2020
Investments, Debt and Equity Securities [Abstract]    
Available-for-sale securities, Under 1 year, Amortized Cost $ 377 $ 308
Available-for-sale securities, After 1 year through 5 years, Amortized Cost 1,888 1,145
Available-for-sale securities, After 5 years through 10 years, Amortized Cost 3,166 1,607
Available-for-sale securities, After 10 years, Amortized Cost 23,075 13,115
Available-for-sale securities, Amortized Cost 28,506 16,175
Available-for-sale securities, Under 1 year, Fair Value 374 304
Available-for-sale securities, After 1 year through 5 years, Fair Value 1,880 1,154
Available-for-sale securities, After 5 years through 10 years, Fair Value 3,180 1,654
Available-for-sale securities, After 10 years, Fair Value 23,026 13,373
Available-for-sale securities, Fair Value 28,460 16,485
Held-to-maturity securities, Under 1 year, Amortized Cost 2 0
Held-to-maturity securities, After 1 year through 5 years, Amortized Cost 162 160
Held-to-maturity securities, After 5 years through 10 years, Amortized Cost 44 131
Held-to-maturity securities, Amortized Cost 12,447 8,861
Held-to-maturity securities, After 10 years, Amortized Cost 12,239 8,570
Held-to-maturity securities, Under 1 year, Fair Value 2 0
Held-to-maturity securities, After 1 year through 5 years, Fair Value 164 169
Held-to-maturity securities, After 5 years through 10 years, Fair Value 45 138
Held-to-maturity securities, After 10 years, Fair Value 12,278 8,948
Held-to-maturity securities, Fair Value $ 12,489 $ 9,255