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Investment Securities
 9 Months Ended
Sep. 30, 2017
Investment Securities Disclosure [Abstract]  
Investment Securities
INVESTMENT SECURITIES
Table 42: Investment Securities Summary
In millions
 
Amortized
Cost

 
Unrealized
 
Fair
Value

 
Gains

 
Losses

 
 
September 30, 2017
 
 
 
 
 
 
 
 
 
Securities Available for Sale
 
 
 
 
 
 
 
 
 
Debt securities
 
 
 
 
 
 
 
 
 
U.S. Treasury and government agencies
 
$
13,233

 
$
193

 
$
(42
)
 
$
13,384

 
Residential mortgage-backed
 
 
 
 
 
 
 
 
 
Agency
 
25,744

 
176

 
(170
)
 
25,750

 
Non-agency
 
2,642

 
326

 
(22
)
 
2,946

 
Commercial mortgage-backed
 
 
 
 
 
 
 
 
 
Agency
 
2,002

 
4

 
(29
)
 
1,977

 
Non-agency
 
2,730

 
28

 
(7
)
 
2,751

 
Asset-backed
 
5,283

 
73

 
(4
)
 
5,352

 
Other debt
 
4,425

 
146

 
(11
)
 
4,560

 
Total debt securities
 
56,059

 
946

 
(285
)
 
56,720

 
Corporate stocks and other
 
536

 

 
(2
)
 
534

 
Total securities available for sale
 
$
56,595

 
$
946

 
$
(287
)
 
$
57,254

 
Securities Held to Maturity
 
 
 
 
 
 
 
 
 
Debt securities
 
 
 
 
 
 
 
 
 
U.S. Treasury and government agencies
 
$
736

 
$
41

 
$
(12
)
 
$
765

 
Residential mortgage-backed
 
 
 
 
 
 
 
 
 
Agency
 
13,509

 
106

 
(102
)
 
13,513

 
Non-agency
 
174

 
6

 
 
 
180

 
Commercial mortgage-backed
 
 
 
 
 
 
 
 
 
Agency
 
430

 
8

 
 
 
438

 
Non-agency
 
543

 
16

 
 
 
559

 
Asset-backed
 
355

 
1

 
 
 
356

 
Other debt
 
1,993

 
107

 
(16
)
 
2,084

 
Total securities held to maturity
 
$
17,740

 
$
285

 
$
(130
)
 
$
17,895

 
December 31, 2016
 
 
 
 
 
 
 
 
 
Securities Available for Sale
 
 
 
 
 
 
 
 
 
Debt securities
 
 
 
 
 
 
 
 
 
U.S. Treasury and government agencies
 
$
13,100

 
$
151

 
$
(77
)
 
$
13,174

 
Residential mortgage-backed
 
 
 
 
 
 
 
 
 
Agency
 
26,245

 
170

 
(287
)
 
26,128

 
Non-agency
 
3,191

 
227

 
(52
)
 
3,366

 
Commercial mortgage-backed
 
 
 
 
 
 
 
 
 
Agency
 
2,150

 
3

 
(34
)
 
2,119

 
Non-agency
 
4,023

 
29

 
(27
)
 
4,025

 
Asset-backed
 
5,938

 
52

 
(22
)
 
5,968

 
Other debt
 
4,656

 
104

 
(37
)
 
4,723

 
Total debt securities
 
59,303

 
736

 
(536
)
 
59,503

 
Corporate stocks and other
 
603

 

 
(2
)
 
601

 
Total securities available for sale
 
$
59,906

 
$
736

 
$
(538
)
 
$
60,104

 
Securities Held to Maturity
 
 
 
 
 
 
 
 
 
Debt securities
 
 
 
 
 
 
 
 
 
U.S. Treasury and government agencies
 
$
527

 
$
35

 
$
(22
)
 
$
540

 
Residential mortgage-backed
 
 
 
 
 
 
 
 
 
Agency
 
11,074

 
68

 
(161
)
 
10,981

 
Non-agency
 
191

 
7

 
 
 
198

 
Commercial mortgage-backed
 
 
 
 
 
 
 
 
 
Agency
 
903

 
24

 
 
 
927

 
Non-agency
 
567

 
10

 
 
 
577

 
Asset-backed
 
558

 
 
 
(2
)
 
556

 
Other debt
 
2,023

 
76

 
(12
)
 
2,087

 
Total securities held to maturity
 
$
15,843

 
$
220

 
$
(197
)
 
$
15,866

 

The fair value of investment securities is impacted by interest rates, credit spreads, market volatility and liquidity conditions. Net unrealized gains and losses in the securities available for sale portfolio are included in Shareholders’ equity as Accumulated other comprehensive income or loss, net of tax, unless credit-related. Securities held to maturity are carried at amortized cost. At September 30, 2017, Accumulated other comprehensive income included pretax gains of $58 million from derivatives that hedged the purchase of investment securities classified as held to maturity. The gains will be accreted into interest income as an adjustment of yield on the securities.
Table 43 presents gross unrealized losses and fair value of debt securities at September 30, 2017 and December 31, 2016. The securities are segregated between investments that have been in a continuous unrealized loss position for less than twelve months and twelve months or more based on the point in time that the fair value declined below the amortized cost basis. The table includes debt securities where a portion of OTTI has been recognized in Accumulated other comprehensive income (loss).
Table 43: Gross Unrealized Loss and Fair Value of Debt Securities
 
 
Unrealized loss position less
than 12 months
 
Unrealized loss position 12
months or more
 
Total
 
In millions
 
Unrealized
Loss

 
Fair
Value

 
Unrealized
Loss

 
Fair
Value

 
Unrealized
Loss

 
Fair
Value

 
September 30, 2017
 
 
 
 
 
 
 
 
 
 
 
 
 
Securities Available for Sale
 
 
 
 
 
 
 
 
 
 
 
 
 
Debt securities
 
 
 
 
 
 
 
 
 
 
 
 
 
U.S. Treasury and government agencies
 
$
(41
)
 
$
2,872

 
$
(1
)
 
$
310

 
$
(42
)
 
$
3,182

 
Residential mortgage-backed
 
 
 
 
 
 
 
 
 
 
 
 
 
Agency
 
(126
)
 
12,005

 
(44
)
 
1,911

 
(170
)
 
13,916

 
Non-agency
 
(a)

 
41

 
(22
)
 
412

 
(22
)
 
453

 
Commercial mortgage-backed
 
 
 
 
 
 
 
 
 
 
 
 
 
Agency
 
(9
)
 
1,105

 
(20
)
 
719

 
(29
)
 
1,824

 
Non-agency
 
(1
)
 
214

 
(6
)
 
388

 
(7
)
 
602

 
Asset-backed
 
(1
)
 
623

 
(3
)
 
436

 
(4
)
 
1,059

 
Other debt
 
(3
)
 
600

 
(8
)
 
615

 
(11
)
 
1,215

 
Total debt securities available for sale
 
$
(181
)
 
$
17,460

 
$
(104
)
 
$
4,791

 
$
(285
)
 
$
22,251

 
Securities Held to Maturity
 
 
 
 
 
 
 
 
 
 
 
 
 
Debt securities
 
 
 
 
 
 
 
 
 
 
 
 
 
U.S. Treasury and government agencies
 
$
(12
)
 
$
448

 
 
 
 
 
$
(12
)
 
$
448

 
Residential mortgage-backed
 
 
 
 
 
 
 
 
 
 
 
 
 
Agency
 
(97
)
 
6,908

 
$
(5
)
 
$
138

 
(102
)
 
7,046

 
Commercial mortgage-backed
 
 
 
 
 
 
 
 
 
 
 
 
 
Agency
 
(a)

 
93

 
(a)

 
2

 
(a)

 
95

 
Non-agency
 
(a)

 
1

 
 
 
 
 
(a)

 
1

 
Other debt
 
(9
)
 
59

 
(7
)
 
67

 
(16
)
 
126

 
Total debt securities held to maturity
 
$
(118
)
 
$
7,509

 
$
(12
)
 
$
207

 
$
(130
)
 
$
7,716

 
December 31, 2016
 
 
 
 
 
 
 
 
 
 
 
 
 
Securities Available for Sale
 
 
 
 
 
 
 
 
 
 
 
 
 
Debt securities
 
 
 
 
 
 
 
 
 
 
 
 
 
U.S. Treasury and government agencies
 
$
(57
)
 
$
3,108

 
$
(20
)
 
$
2,028

 
$
(77
)
 
$
5,136

 
Residential mortgage-backed
 
 
 
 
 
 
 
 
 
 
 
 
 
Agency
 
(267
)
 
16,942

 
(20
)
 
922

 
(287
)
 
17,864

 
Non-agency
 
(1
)
 
109

 
(51
)
 
1,119

 
(52
)
 
1,228

 
Commercial mortgage-backed
 
 
 
 
 
 
 
 
 
 
 
 
 
Agency
 
(33
)
 
1,577

 
(1
)
 
86

 
(34
)
 
1,663

 
Non-agency
 
(14
)
 
880

 
(13
)
 
987

 
(27
)
 
1,867

 
Asset-backed
 
(5
)
 
1,317

 
(17
)
 
902

 
(22
)
 
2,219

 
Other debt
 
(33
)
 
1,827

 
(4
)
 
243

 
(37
)
 
2,070

 
Total debt securities available for sale
 
$
(410
)
 
$
25,760

 
$
(126
)
 
$
6,287

 
$
(536
)
 
$
32,047

 
Securities Held to Maturity
 
 
 
 
 
 
 
 
 
 
 
 
 
Debt securities
 
 
 
 
 
 
 
 
 
 
 
 
 
U.S. Treasury and government agencies
 
$
(22
)
 
$
238

 
 
 
 
 
$
(22
)
 
$
238

 
Residential mortgage-backed
 
 
 
 
 
 
 
 
 
 
 
 
 
Agency
 
(153
)
 
8,041

 
$
(8
)
 
$
161

 
(161
)
 
8,202

 
Asset-backed
 
 
 
 
 
(2
)
 
451

 
(2
)
 
451

 
Other debt
 
(12
)
 
146

 
(a)

 
1

 
(12
)
 
147

 
Total debt securities held to maturity
 
$
(187
)
 
$
8,425

 
$
(10
)
 
$
613

 
$
(197
)
 
$
9,038

 
(a)
The unrealized loss on these securities was less than $.5 million.
Evaluating Investment Securities for Other-than-Temporary Impairments

For the securities in Table 43, as of September 30, 2017 we do not intend to sell and believe we will not be required to sell the securities prior to recovery of the amortized cost basis.

On at least a quarterly basis, we review all debt securities that are in an unrealized loss position for OTTI, as discussed in Note 1 Accounting Policies of the 2016 Form 10-K. For those securities on our balance sheet at September 30, 2017, where during our quarterly security-level impairment assessments we determined losses represented OTTI, we have recorded cumulative credit losses of $1.1 billion in earnings and accordingly have reduced the amortized cost of our securities.
The majority of these cumulative impairment charges related to non-agency residential mortgage-backed and asset-backed securities rated BB or lower. During 2017 and 2016, the OTTI credit losses recognized in noninterest income and the OTTI noncredit losses recognized in accumulated other comprehensive income (loss), net of tax, on securities were not significant.

Information relating to gross realized securities gains and losses from the sales of securities is set forth in the following table:
Table 44: Gains (Losses) on Sales of Securities Available for Sale
Nine months ended September 30
In millions
Proceeds

Gross Gains

Gross Losses

Net Gains

Tax Expense

2017
$
4,221

$
31

$
(21
)
$
10

$
3

2016
$
2,546

$
20



$
20

$
7


 
The following table presents, by remaining contractual maturity, the amortized cost, fair value and weighted-average yield of debt securities at September 30, 2017.
Table 45: Contractual Maturity of Debt Securities
September 30, 2017
Dollars in millions
 
1 Year or Less

 
After 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
 
$
158

 
$
6,992

 
$
4,766

 
$
1,317

 
$
13,233

 
Residential mortgage-backed
 
 
 
 
 
 
 
 
 
 
 
Agency
 
2

 
56

 
571

 
25,115

 
25,744

 
Non-agency
 
1

 
 
 
 
 
2,641

 
2,642

 
Commercial mortgage-backed
 
 
 
 
 
 
 
 
 
 
 
Agency
 
3

 
206

 
683

 
1,110

 
2,002

 
Non-agency
 


 
99

 
189

 
2,442

 
2,730

 
Asset-backed
 
43

 
1,853

 
1,853

 
1,534

 
5,283

 
Other debt
 
540

 
2,076

 
613

 
1,196

 
4,425

 
Total debt securities available for sale
 
$
747

 
$
11,282

 
$
8,675

 
$
35,355

 
$
56,059

 
Fair value
 
$
752

 
$
11,348

 
$
8,760

 
$
35,860

 
$
56,720

 
Weighted-average yield, GAAP basis
 
2.95
%
 
2.16
%
 
2.24
%
 
2.94
%
 
2.67
%
 
Securities Held to Maturity
 
 
 
 
 
 
 
 
 
 
 
U.S. Treasury and government agencies
 
 
 
 
 
$
376

 
$
360

 
$
736

 
Residential mortgage-backed
 
 
 
 
 
 
 
 
 
 
 
Agency
 
 
 
$
50

 
377

 
13,082

 
13,509

 
Non-agency
 
 
 
 
 
 
 
174

 
174

 
Commercial mortgage-backed
 
 
 
 
 
 
 
 
 
 
 
Agency
 
$
157

 
214

 
5

 
54

 
430

 
Non-agency
 
 
 
 
 
 
 
543

 
543

 
Asset-backed
 
 
 
 
 
264

 
91

 
355

 
Other debt
 
13

 
313

 
915

 
752

 
1,993

 
Total debt securities held to maturity
 
$
170

 
$
577

 
$
1,937

 
$
15,056

 
$
17,740

 
Fair value
 
$
170

 
$
597

 
$
2,015

 
$
15,113

 
$
17,895

 
Weighted-average yield, GAAP basis
 
3.29
%
 
3.95
%
 
3.38
%
 
3.19
%
 
3.23
%
 


Weighted-average yields are based on amortized cost with effective yields weighted for the contractual maturity of each security. At September 30, 2017, there were no securities of a single issuer, other than FNMA, that exceeded 10% of Total shareholders’ equity. The FNMA investments had a total amortized cost and fair value of $30.4 billion.

The following table presents the fair value of securities that have been either pledged to or accepted from others to collateralize outstanding borrowings.
Table 46: Fair Value of Securities Pledged and Accepted as Collateral
In millions
September 30
2017

December 31
2016

Pledged to others
$
8,284

$
9,493

Accepted from others:
 
 
Permitted by contract or custom to
     sell or repledge
$
1,497

$
912

Permitted amount repledged to
    others
$
1,409

$
799


The securities pledged to others include positions held in our portfolio of investment securities, trading securities and securities accepted as collateral from others that we are permitted by contract or custom to sell or repledge, and were used to secure public and trust deposits, repurchase agreements and for other purposes.