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INVESTMENT SECURITIES AND OTHER SECURITIES (Tables)
 9 Months Ended
Sep. 30, 2025
Investments, Debt and Equity Securities [Abstract]  
Amortized Cost, Fair Value, and Gross Unrealized Gains and Losses by Investment Category The following tables provide amortized cost, fair value, and gross unrealized gains and losses by investment category.
Unrealized
(dollar amounts in millions)
Amortized
Cost (1)(2)
Gross
Gains		Gross
Losses		Fair Value
At September 30, 2025
Available-for-sale securities:
U.S. Treasury$5,371 $42 $(3)$5,410 
Federal agencies:
Residential MBS11,133 3 (1,461)9,675 
Residential CMO
4,761 5 (324)4,442 
Commercial MBS2,445 — (663)1,782 
Other agencies116 — (3)113 
Total U.S. Treasury, federal agency, and other agency securities
23,826 50 (2,454)21,422 
Municipal securities4,194 8 (87)4,115 
Corporate debt192 — (17)175 
Asset-backed securities269 — (10)259 
Private-label CMO111 — (7)104 
Other securities/sovereign debt
10 — — 10 
Total available-for-sale securities$28,602 $58 $(2,575)$26,085 
Held-to-maturity securities:
U.S. Treasury$2,339 $16 $(1)$2,354 
Federal agencies:
Residential MBS7,919 — (1,005)6,914 
Residential CMO
3,971 4 (543)3,432 
Commercial MBS1,314 — (196)1,118 
Other agencies53 — (3)50 
Total U.S. Treasury, federal agency, and other agency securities
15,596 20 (1,748)13,868 
Municipal securities1 — — 1 
Total held-to-maturity securities$15,597 $20 $(1,748)$13,869 
Other securities, at cost:
Non-marketable equity securities:
FRB stock$575 $— $— $575 
FHLB stock237 — — 237 
Other non-marketable equity securities26 — — 26 
Other securities, at fair value:
Mutual funds30 — — 30 
Equity securities2 — — 2 
Total other securities$870 $— $— $870 
(1)Amortized cost amounts exclude accrued interest receivable, which is recorded within accrued income and other receivables on the Unaudited Consolidated Balance Sheets. At September 30, 2025, accrued interest receivable on AFS securities and HTM securities totaled $89 million and $41 million, respectively.
(2)Excluded from the amortized cost are portfolio level basis adjustments for securities designated in fair value hedges under the portfolio layer method. The basis adjustments totaled $160 million and represent a reduction to the amortized cost of the securities being hedged. The securities being hedged under the portfolio layer method are primarily Residential CMO and Residential MBS securities.
Unrealized
(dollar amounts in millions)Amortized
Cost (1)(2)		Gross
Gains		Gross
Losses		Fair Value
At December 31, 2024
Available-for-sale securities:
U.S. Treasury$6,588 $11 $(43)$6,556 
Federal agencies:
Residential MBS11,988 — (1,971)10,017 
Residential CMO3,778 1 (434)3,345 
Commercial MBS2,519 — (767)1,752 
Other agencies135 — (5)130 
Total U.S. Treasury, federal agency, and other agency securities25,008 12 (3,220)21,800 
Municipal securities4,119 1 (132)3,988 
Corporate debt1,157 — (102)1,055 
Asset-backed securities330 — (19)311 
Private-label CMO119 — (10)109 
Other securities/sovereign debt10 — — 10 
Total available-for-sale securities$30,743 $13 $(3,483)$27,273 
Held-to-maturity securities:
U.S. Treasury$2,045 $— $(22)$2,023 
Federal agencies:
Residential MBS8,533 — (1,336)7,197 
Residential CMO4,309 3 (691)3,621 
Commercial MBS1,407 — (231)1,176 
Other agencies73 — (5)68 
Total U.S. Treasury, federal agency, and other agency securities16,367 3 (2,285)14,085 
Municipal securities1 — — 1 
Total held-to-maturity securities$16,368 $3 $(2,285)$14,086 
Other securities, at cost:
Non-marketable equity securities:
FRB stock$521 $— $— $521 
FHLB stock246 — — 246 
Other non-marketable equity securities25 — — 25 
Other securities, at fair value:
Mutual funds29 — — 29 
Equity securities1 1 — 2 
Total other securities$822 $1 $— $823 
(1)Amortized cost amounts exclude accrued interest receivable, which is recorded within accrued income and other receivables on the Unaudited Consolidated Balance Sheets. At December 31, 2024, accrued interest receivable on AFS securities and HTM securities totaled $89 million and $46 million, respectively.
(2)Excluded from the amortized cost are portfolio level basis adjustments for securities designated in fair value hedges under the portfolio layer method. The basis adjustments totaled $458 million and represent a reduction to the amortized cost of the securities being hedged. The securities being hedged under the portfolio layer method are primarily Residential CMO and Residential MBS securities.
Investments by Contractual Maturity The following table provides the amortized cost and fair value of securities by contractual maturity. Expected maturities may differ from contractual maturities as issuers may have the right to call or prepay obligations with or without incurring penalties.
At September 30, 2025At December 31, 2024
(dollar amounts in millions)Amortized CostFair ValueAmortized CostFair Value
Available-for-sale securities:
Under 1 year$2,101 $2,096 $3,620 $3,624 
After 1 year through 5 years5,628 5,637 5,993 5,844 
After 5 years through 10 years1,921 1,796 1,857 1,732 
After 10 years18,952 16,556 19,273 16,073 
Total available-for-sale securities$28,602 $26,085 $30,743 $27,273 
Held-to-maturity securities:
Under 1 year$404 $404 $255 $256 
After 1 year through 5 years1,967 1,981 1,818 1,796 
After 5 years through 10 years146 134 65 60 
After 10 years13,080 11,350 14,230 11,974 
Total held-to-maturity securities$15,597 $13,869 $16,368 $14,086 
Investments with Unrealized Losses by Investment Category
The following tables provide detail on investment securities with unrealized losses aggregated by investment category and the length of time the individual securities have been in a continuous loss position.
Less than 12 MonthsOver 12 MonthsTotal
(dollar amounts in millions)Fair
Value		Gross Unrealized
Losses		Fair
Value		Gross Unrealized
Losses		Fair
Value		Gross Unrealized
Losses
At September 30, 2025
Available-for-sale securities:
U.S. Treasury$98 $(1)$798 $(2)$896 $(3)
Federal agencies:
Residential MBS15 — 9,356 (1,461)9,371 (1,461)
Residential CMO218 — 2,692 (324)2,910 (324)
Commercial MBS— — 1,782 (663)1,782 (663)
Other agencies29 — 65 (3)94 (3)
Total U.S. Treasury, federal agency, and other agency securities360 (1)14,693 (2,453)15,053 (2,454)
Municipal securities862 (12)2,167 (75)3,029 (87)
Corporate debt— — 175 (17)175 (17)
Asset-backed securities— — 254 (10)254 (10)
Private-label CMO— — 81 (7)81 (7)
Total temporarily impaired available-for-sale securities$1,222 $(13)$17,370 $(2,562)$18,592 $(2,575)
Held-to-maturity securities:
U.S. Treasury$94 $— $362 $(1)$456 $(1)
Federal agencies:
Residential MBS45 (1)6,822 (1,004)6,867 (1,005)
Residential CMO50 — 3,019 (543)3,069 (543)
Commercial MBS— — 1,117 (196)1,117 (196)
Other agencies— — 50 (3)50 (3)
Total U.S. Treasury, federal agency, and other agency securities189 (1)11,370 (1,747)11,559 (1,748)
Municipal securities— — 1 — 1 — 
Total temporarily impaired held-to-maturity securities$189 $(1)$11,371 $(1,747)$11,560 $(1,748)
Less than 12 MonthsOver 12 MonthsTotal
(dollar amounts in millions)Fair
Value		Gross Unrealized
Losses		Fair
Value		Gross Unrealized
Losses		Fair
Value		Gross Unrealized
Losses
At December 31, 2024
Available-for-sale securities:
U.S. Treasury$3,153 $(43)$— $— $3,153 $(43)
Federal agencies:
Residential MBS275 (5)9,676 (1,966)9,951 (1,971)
Residential CMO243 (1)2,802 (433)3,045 (434)
Commercial MBS— — 1,752 (767)1,752 (767)
Other agencies21 — 69 (5)90 (5)
Total U.S. Treasury, federal agency, and other agency securities3,692 (49)14,299 (3,171)17,991 (3,220)
Municipal securities985 (25)2,336 (107)3,321 (132)
Corporate debt— — 1,053 (102)1,053 (102)
Asset-backed securities49 — 263 (19)312 (19)
Private-label CMO— — 87 (10)87 (10)
Total temporarily impaired available-for-sale securities$4,726 $(74)$18,038 $(3,409)$22,764 $(3,483)
Held-to-maturity securities:
U.S. Treasury$1,581 $(22)$— $— $1,581 $(22)
Federal agencies:
Residential MBS99 (2)7,097 (1,334)7,196 (1,336)
Residential CMO163 (1)3,152 (690)3,315 (691)
Commercial MBS— — 1,176 (231)1,176 (231)
Other agencies— — 69 (5)69 (5)
Total U.S. Treasury, federal agency, and other agency securities1,843 (25)11,494 (2,260)13,337 (2,285)
Municipal securities— — 1 — 1 — 
Total temporarily impaired held-to-maturity securities$1,843 $(25)$11,495 $(2,260)$13,338 $(2,285)