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INVESTMENT SECURITIES - Securities Classified as Current and Long-Term (Details) - USD ($) $ in Millions | Jun. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Investment Securities, Available-for-sale Amortized Cost to Fair Value |  |
Amortized Cost | $ 14,696 | $ 13,440
Gross Unrealized Gains | 3 | 218
Gross Unrealized Losses | (1,367) | (161)
Fair Value | 13,332 | 13,497
Common stock | 85 | 475
Total investment securities | 13,417 | 13,972
U.S. Treasury and agency obligations |  |
Investment Securities, Available-for-sale Amortized Cost to Fair Value |  |
Amortized Cost | 568 | 611
Gross Unrealized Gains | 0 | 1
Gross Unrealized Losses | (43) | (10)
Fair Value | 525 | 602
Mortgage-backed securities |  |
Investment Securities, Available-for-sale Amortized Cost to Fair Value |  |
Amortized Cost | 3,332 | 3,265
Gross Unrealized Gains | 0 | 33
Gross Unrealized Losses | (392) | (69)
Fair Value | 2,940 | 3,229
Tax-exempt municipal securities |  |
Investment Securities, Available-for-sale Amortized Cost to Fair Value |  |
Amortized Cost | 776 | 810
Gross Unrealized Gains | 1 | 33
Gross Unrealized Losses | (34) | (2)
Fair Value | 743 | 841
Residential |  |
Investment Securities, Available-for-sale Amortized Cost to Fair Value |  |
Amortized Cost | 493 | 373
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (54) | (6)
Fair Value | 439 | 367
Commercial |  |
Investment Securities, Available-for-sale Amortized Cost to Fair Value |  |
Amortized Cost | 1,582 | 1,394
Gross Unrealized Gains | 0 | 27
Gross Unrealized Losses | (109) | (11)
Fair Value | 1,473 | 1,410
Asset-backed securities |  |
Investment Securities, Available-for-sale Amortized Cost to Fair Value |  |
Amortized Cost | 1,764 | 1,346
Gross Unrealized Gains | 0 | 6
Gross Unrealized Losses | (50) | (4)
Fair Value | 1,714 | 1,348
Corporate debt securities |  |
Investment Securities, Available-for-sale Amortized Cost to Fair Value |  |
Amortized Cost | 6,181 | 5,641
Gross Unrealized Gains | 2 | 118
Gross Unrealized Losses | (685) | (59)
Fair Value | $ 5,498 | $ 5,700

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