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Investment Securities (Tables)
 3 Months Ended
Mar. 31, 2022
Investment Securities Disclosure [Abstract]  
Investment Securities Summary The following table summarizes our available for sale and held to maturity portfolios by major security type:
Table 37: Investment Securities Summary (a)
March 31, 2022December 31, 2021
In millionsAmortized
Cost 		UnrealizedFair
Value		Amortized
Cost		UnrealizedFair
Value
GainsLossesGainsLosses
Securities Available for Sale
U.S. Treasury and government agencies$36,872 $56 $(1,707)$35,221 $46,210 $324 $(370)$46,164 
Residential mortgage-backed
Agency61,407 91 (2,683)58,815 67,326 695 (389)67,632 
Non-agency1,132 210 (10)1,332 927 231 1,158 
Commercial mortgage-backed
Agency2,152 4 (46)2,110 1,740 39 (6)1,773 
Non-agency3,504 2 (51)3,455 3,423 31 (18)3,436 
Asset-backed6,407 46 (148)6,305 6,380 60 (31)6,409 
Other 5,117 83 (125)5,075 4,792 186 (14)4,964 
Total securities available for sale (b)$116,591 $492 $(4,770)$112,313 $130,798 $1,566 $(828)$131,536 
Securities Held to Maturity
U.S. Treasury and government agencies$9,991 $25 $(5)$10,011 $814 $76 $890 
Agency residential mortgage-backed9,548 9,548 
Other559 11 (14)556 612 27 $(7)632 
Total securities held to maturity (c) (d)$20,098 $36 $(19)$20,115 $1,426 $103 $(7)$1,522 
(a) The accrued interest associated with our securities portfolio totaled $312 million and $327 million at March 31, 2022 and December 31, 2021, respectively.
    These amounts are included in Other assets on the Consolidated Balance Sheet.
(b) Amortized cost is presented net of allowance of $131 million and $130 million for securities available for sale at March 31, 2022 and December 31, 2021, respectively.
(c) Credit ratings represent a primary credit quality indicator used to monitor and manage credit risk. 99% and 86% of our securities held to maturity were rated AAA/AA at March 31, 2022 and December 31, 2021, respectively.
(d) Held to maturity securities transferred from available for sale are included in held to maturity at fair value at the time of the transfer. The amortized cost of held to maturity securities included net unrealized losses of $1.3 billion related to securities transferred, which are offset in AOCI, net of tax.
Gross Unrealized Loss and Fair Value of Securities Available for Sale Without an Allowance for Credit Losses
Table 38: Gross Unrealized Loss and Fair Value of Securities Available for Sale Without an Allowance for Credit Losses
Unrealized loss position
less than 12 months		Unrealized loss position
12 months or more		Total
In millionsUnrealized
Loss		Fair
Value		Unrealized
Loss		Fair
Value		Unrealized
Loss		Fair
Value
March 31, 2022
U.S. Treasury and government agencies$(1,433)$26,147 $(274)$3,788 $(1,707)$29,935 
Residential mortgage-backed
Agency(2,551)50,802 (132)1,940 (2,683)52,742 
Non-agency(9)334 (1)20 (10)354 
Commercial mortgage-backed
Agency(42)1,481 (4)120 (46)1,601 
Non-agency(31)2,246 (6)470 (37)2,716 
Asset-backed(123)5,091 (25)517 (148)5,608 
Other (100)2,324 (11)135(111)2,459 
Total securities available for sale$(4,289)$88,425 $(453)$6,990 $(4,742)$95,415 
December 31, 2021
U.S. Treasury and government agencies$(370)$32,600 $(370)$32,600 
Agency residential mortgage-backed(369)41,521 $(20)$1,489 (389)43,010 
Commercial mortgage-backed
Agency(5)451 (1)60 (6)511 
Non-agency(4)1,453 (3)474 (7)1,927 
Asset-backed(29)3,465 (2)188 (31)3,653 
Other(13)1,405 (13)1,405 
Total securities available for sale$(790)$80,895 $(26)$2,211 $(816)$83,106 
Gains (losses) on Sales Of Securities Available for Sale
Information relating to gross realized securities gains and losses from the sales of securities is set forth in the following table:

Table 39: Gains (Losses) on Sales of Securities Available for Sale
Three months ended March 31
In millions		Gross GainsGross LossesNet Gains (Losses) Tax Expense (Benefit)
2022$11 $(15)$(4)$(1)
2021$159 $(134)$25 $5 
Contractual Maturity of Securities
The following table presents, by remaining contractual maturity, the amortized cost, fair value and weighted-average yield of debt securities at March 31, 2022:
Table 40: Contractual Maturity of Debt Securities
March 31, 2022
Dollars in millions		1 Year or LessAfter 1 Year
through 5 Years		After 5 Years
through 10 Years		After 10
Years		Total
Securities Available for Sale
U.S. Treasury and government agencies$2,730 $24,432 $7,505 $2,205 $36,872 
Residential mortgage-backed
Agency2 110 3,034 58,261 61,407 
Non-agency2 1,130 1,132 
Commercial mortgage-backed
Agency45 332 1,359 416 2,152 
Non-agency172 242 3,090 3,504 
Asset-backed37 1,803 1,070 3,497 6,407 
Other 216 2,722 1,584 595 5,117 
Total securities available for sale at amortized cost$3,030 $29,571 $14,796 $69,194 $116,591 
Fair value$3,037 $28,409 $14,188 $66,679 $112,313 
Weighted-average yield, GAAP basis (a)1.81 %1.23 %1.89 %2.45 %2.05 %
Securities Held to Maturity
U.S. Treasury and government agencies$6,076 $3,493 $422 $9,991 
Agency residential mortgage-backed9,548 9,548 
Other$155 236 108 60 559 
Total securities held to maturity at amortized cost$155 $6,312 $3,601 $10,030 $20,098 
Fair value$157 $6,318 $3,624 $10,016 $20,115 
Weighted-average yield, GAAP basis (a)3.66 %0.82 %1.51 %2.07 %1.59 %
(a)Weighted-average yields are based on amortized cost with effective yields weighted for the contractual maturity of each security. Actual maturities and yields may differ as certain securities may be prepaid.
Fair Value of Securities Pledged and Accepted as Collateral
The following table presents the fair value of securities that have been either pledged to or accepted from others to collateralize outstanding borrowings:
Table 41: Fair Value of Securities Pledged and Accepted as Collateral
In millionsMarch 31
2022		December 31
2021
Pledged to others$25,791 $27,349 
Accepted from others:
Permitted by contract or custom to sell or repledge$1,172 $707 
Permitted amount repledged to others$1,172 $707