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INVESTMENT SECURITIES - Securities Classified as Current and Long-Term (Details) - USD ($) $ in Millions | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Investment Securities, Available-for-sale Amortized Cost to Fair Value |  |
Amortized Cost | $ 20,279 | $ 18,302
Gross Unrealized Gains | 152 | 34
Gross Unrealized Losses | (998) | (1,328)
Fair Value | 19,433 | 17,008
U.S. Treasury and agency obligations |  |
Investment Securities, Available-for-sale Amortized Cost to Fair Value |  |
Amortized Cost | 3,203 | 2,717
Gross Unrealized Gains | 13 | 1
Gross Unrealized Losses | (33) | (51)
Fair Value | 3,183 | 2,667
Mortgage-backed securities |  |
Investment Securities, Available-for-sale Amortized Cost to Fair Value |  |
Amortized Cost | 4,501 | 3,946
Gross Unrealized Gains | 33 | 1
Gross Unrealized Losses | (351) | (425)
Fair Value | 4,183 | 3,522
Tax-exempt municipal securities |  |
Investment Securities, Available-for-sale Amortized Cost to Fair Value |  |
Amortized Cost | 602 | 879
Gross Unrealized Gains | 0 | 1
Gross Unrealized Losses | (18) | (22)
Fair Value | 584 | 858
Residential |  |
Investment Securities, Available-for-sale Amortized Cost to Fair Value |  |
Amortized Cost | 555 | 465
Gross Unrealized Gains | 1 | 1
Gross Unrealized Losses | (54) | (66)
Fair Value | 502 | 400
Commercial |  |
Investment Securities, Available-for-sale Amortized Cost to Fair Value |  |
Amortized Cost | 1,292 | 1,471
Gross Unrealized Gains | 2 | 0
Gross Unrealized Losses | (78) | (126)
Fair Value | 1,216 | 1,345
Asset-backed securities |  |
Investment Securities, Available-for-sale Amortized Cost to Fair Value |  |
Amortized Cost | 1,533 | 1,813
Gross Unrealized Gains | 11 | 2
Gross Unrealized Losses | (20) | (44)
Fair Value | 1,524 | 1,771
Corporate debt securities |  |
Investment Securities, Available-for-sale Amortized Cost to Fair Value |  |
Amortized Cost | 8,593 | 7,011
Gross Unrealized Gains | 92 | 28
Gross Unrealized Losses | (444) | (594)
Fair Value | $ 8,241 | $ 6,445

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