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INVESTMENT SECURITIES - Securities Classified as Current and Long-Term (Details) - USD ($) $ in Millions | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Investment Securities, Available-for-sale Amortized Cost to Fair Value |  |
Amortized Cost | $ 17,466 | $ 15,946
Gross Unrealized Gains | 14 | 9
Gross Unrealized Losses | (1,965) | (1,701)
Fair Value | 15,515 | 14,254
Common stock | 0 | 7
Total investment securities | 15,515 | 14,261
U.S. Treasury and agency obligations |  |
Investment Securities, Available-for-sale Amortized Cost to Fair Value |  |
Amortized Cost | 2,043 | 1,093
Gross Unrealized Gains | 0 | 1
Gross Unrealized Losses | (105) | (55)
Fair Value | 1,938 | 1,039
Mortgage-backed securities |  |
Investment Securities, Available-for-sale Amortized Cost to Fair Value |  |
Amortized Cost | 3,890 | 3,697
Gross Unrealized Gains | 0 | 4
Gross Unrealized Losses | (637) | (471)
Fair Value | 3,253 | 3,230
Tax-exempt municipal securities |  |
Investment Securities, Available-for-sale Amortized Cost to Fair Value |  |
Amortized Cost | 848 | 765
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (50) | (37)
Fair Value | 798 | 728
Residential |  |
Investment Securities, Available-for-sale Amortized Cost to Fair Value |  |
Amortized Cost | 497 | 477
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (85) | (76)
Fair Value | 412 | 401
Commercial |  |
Investment Securities, Available-for-sale Amortized Cost to Fair Value |  |
Amortized Cost | 1,475 | 1,554
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (155) | (155)
Fair Value | 1,320 | 1,399
Asset-backed securities |  |
Investment Securities, Available-for-sale Amortized Cost to Fair Value |  |
Amortized Cost | 1,849 | 1,809
Gross Unrealized Gains | 0 | 1
Gross Unrealized Losses | (65) | (79)
Fair Value | 1,784 | 1,731
Corporate debt securities |  |
Investment Securities, Available-for-sale Amortized Cost to Fair Value |  |
Amortized Cost | 6,864 | 6,551
Gross Unrealized Gains | 14 | 3
Gross Unrealized Losses | (868) | (828)
Fair Value | $ 6,010 | $ 5,726

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