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INVESTMENT SECURITIES - Classified as Current and Long-Term (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Debt Securities Amortized Cost to Fair Value |  |
Amortized Cost | $ 18,302 | $ 15,946
Gross Unrealized Gains | 34 | 9
Gross Unrealized Losses | (1,328) | (1,701)
Fair Value | 17,008 | 14,254
Common stock | 0 | 7
Total investment securities | 17,008 | 14,261
U.S. Treasury and agency obligations |  |
Debt Securities Amortized Cost to Fair Value |  |
Amortized Cost | 2,717 | 1,093
Gross Unrealized Gains | 1 | 1
Gross Unrealized Losses | (51) | (55)
Fair Value | 2,667 | 1,039
Mortgage-backed securities |  |
Debt Securities Amortized Cost to Fair Value |  |
Amortized Cost | 3,946 | 3,697
Gross Unrealized Gains | 1 | 4
Gross Unrealized Losses | (425) | (471)
Fair Value | 3,522 | 3,230
Tax-exempt municipal securities |  |
Debt Securities Amortized Cost to Fair Value |  |
Amortized Cost | 879 | 765
Gross Unrealized Gains | 1 | 0
Gross Unrealized Losses | (22) | (37)
Fair Value | 858 | 728
Residential |  |
Debt Securities Amortized Cost to Fair Value |  |
Amortized Cost | 465 | 477
Gross Unrealized Gains | 1 | 0
Gross Unrealized Losses | (66) | (76)
Fair Value | 400 | 401
Commercial |  |
Debt Securities Amortized Cost to Fair Value |  |
Amortized Cost | 1,471 | 1,554
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (126) | (155)
Fair Value | 1,345 | 1,399
Asset-backed securities |  |
Debt Securities Amortized Cost to Fair Value |  |
Amortized Cost | 1,813 | 1,809
Gross Unrealized Gains | 2 | 1
Gross Unrealized Losses | (44) | (79)
Fair Value | 1,771 | 1,731
Corporate debt securities |  |
Debt Securities Amortized Cost to Fair Value |  |
Amortized Cost | 7,011 | 6,551
Gross Unrealized Gains | 28 | 3
Gross Unrealized Losses | (594) | (828)
Fair Value | $ 6,445 | $ 5,726

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