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INVESTMENT SECURITIES (Tables)
 12 Months Ended
Dec. 31, 2022
Investments, Debt and Equity Securities [Abstract]  
Schedule of Investment Securities Classified as Current and Long-Term
Investment securities classified as current and long-term were as follows at December 31, 2022 and 2021, respectively:
Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Fair
Value
 (in millions)
December 31, 2022
U.S. Treasury and other U.S. government
    corporations and agencies:
U.S. Treasury and agency obligations$1,093 $1 $(55)$1,039 
Mortgage-backed securities3,697 4 (471)3,230 
Tax-exempt municipal securities765 — (37)728 
Mortgage-backed securities:
Residential477 — (76)401 
Commercial1,554 — (155)1,399 
Asset-backed securities1,809 1 (79)1,731 
Corporate debt securities6,551 3 (828)5,726 
Total debt securities$15,946 $9 $(1,701)14,254 
Common stock7 
Total investment securities$14,261 
December 31, 2021
U.S. Treasury and other U.S. government
    corporations and agencies:
U.S. Treasury and agency obligations$611 $1 $(10)$602 
Mortgage-backed securities3,265 33 (69)3,229 
Tax-exempt municipal securities810 33 (2)841 
Mortgage-backed securities:
Residential373 — (6)367 
Commercial1,394 27 (11)1,410 
Asset-backed securities1,346 6 (4)1,348 
Corporate debt securities5,641 118 (59)5,700 
Total debt securities$13,440 $218 $(161)13,497 
Common stock475 
Total investment securities$13,972 
Schedule of Gross Unrealized Losses and Fair Value of Securities
Gross unrealized losses and fair values aggregated by investment category and length of time that individual debt securities have been in a continuous unrealized loss position were as follows at December 31, 2022 and 2021, respectively:
 Less than 12 months12 months or moreTotal
 Fair
Value		Gross
Unrealized
Losses		Fair
Value		Gross
Unrealized
Losses		Fair
Value		Gross
Unrealized
Losses
 (in millions)
December 31, 2022
U.S. Treasury and other U.S. government
    corporations and agencies:
U.S. Treasury and agency obligations$512 $(5)$397 $(50)$909 $(55)
Mortgage-backed securities1,231 (104)1,683 (367)2,914 (471)
Tax-exempt municipal securities64 (2)615 (36)679 (38)
Mortgage-backed securities:
Residential124 (16)274 (60)398 (76)
Commercial243 (13)1,157 (142)1,400 (155)
Asset-backed securities620 (32)1,011 (46)1,631 (78)
Corporate debt securities1,625 (98)3,825 (730)5,450 (828)
Total debt securities$4,419 $(270)$8,962 $(1,431)$13,381 $(1,701)
December 31, 2021
U.S. Treasury and other U.S. government
    corporations and agencies:
U.S. Treasury and agency obligations$201 $(3)$355 $(7)$556 $(10)
Mortgage-backed securities2,082 (49)556 (20)2,638 (69)
Tax-exempt municipal securities68 (1)34 (1)102 (2)
Mortgage-backed securities:
Residential358 (6)8 — 366 (6)
Commercial295 (4)400 (7)695 (11)
Asset-backed securities530 (3)425 (1)955 (4)
Corporate debt securities1,456 (28)769 (31)2,225 (59)
Total debt securities$4,990 $(94)$2,547 $(67)$7,537 $(161)
Schedule of Realized Gains (Losses) Related to Investment Securities Included Within Investment Income
The detail of realized gains (losses) related to investment securities and included within investment income was as follows for the years ended December 31, 2022, 2021, and 2020:
202220212020
(in millions)
Gross gains on investment securities$62 $219 $110 
Gross losses on investment securities(144)(8)(18)
Gross gains on equity securities51 23 746 
Gross losses on equity securities(174)(364)— 
Net recognized (losses) gains on investment securities$(205)$(130)$838 
Gain (Loss) on Equity Securities
The gains and losses related to equity securities for the years ended December 31, 2022, 2021 and 2020 was as follows:
202220212020
(in millions)
Net (losses) gains recognized on equity securities during the period$(123)$(341)$746 
Less: Net losses recognized on equity securities sold during the period(105)(13)— 
Unrealized (losses) gains recognized on equity securities still held at the end of the period$(18)$(328)$746 
Schedule of Contractual Maturities of Debt Securities Available for Sale
The contractual maturities of debt securities available for sale at December 31, 2022, regardless of their balance sheet classification, are shown below. Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties.
Amortized
Cost		Fair
Value
 (in millions)
Due within one year$529 $525 
Due after one year through five years3,399 3,210 
Due after five years through ten years3,231 2,764 
Due after ten years1,250 994 
Mortgage and asset-backed securities7,537 6,761 
Total debt securities$15,946 $14,254