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Investment Securities (Tables)
 3 Months Ended
Mar. 31, 2019
Investments, Debt and Equity Securities [Abstract]  
Schedule of Available-for-Sale Securities The table below presents the amortized cost, gross unrealized gains and losses, and fair value of securities available for sale as of March 31, 2019 and December 31, 2018.
Table 3.1: Investment Securities Available for Sale
 
 
March 31, 2019
(Dollars in millions)
 
Amortized
Cost
 
Gross
Unrealized
Gains
 
Gross
Unrealized
Losses
 
Fair
Value
Investment securities available for sale:
 
 
 
 
 
 
 
 
U.S. Treasury securities
 
$
4,136

 
$
1

 
$
(10
)
 
$
4,127

RMBS:
 
 
 
 
 
 
 
 
Agency
 
33,621

 
111

 
(587
)
 
33,145

Non-agency
 
1,404

 
318

 
(2
)
 
1,720

Total RMBS
 
35,025

 
429

 
(589
)
 
34,865

Agency CMBS
 
5,346

 
24

 
(48
)
 
5,322

Other securities(1)
 
1,575

 
3

 
(4
)
 
1,574

Total investment securities available for sale
 
$
46,082

 
$
457

 
$
(651
)
 
$
45,888

 
 
December 31, 2018
(Dollars in millions)
 
Amortized
Cost
 
Gross
Unrealized
Gains
 
Gross
Unrealized
Losses
 
Fair
Value
Investment securities available for sale:
 
 
 
 
 
 
 
 
U.S. Treasury securities
 
$
6,146

 
$
15

 
$
(17
)
 
$
6,144

RMBS:
 
 
 
 
 
 
 
 
Agency
 
32,710

 
62

 
(869
)
 
31,903

Non-agency
 
1,440

 
304

 
(2
)
 
1,742

Total RMBS
 
34,150

 
366

 
(871
)
 
33,645

Agency CMBS
 
4,806

 
11

 
(78
)
 
4,739

Other securities(1)
 
1,626

 
2

 
(6
)
 
1,622

Total investment securities available for sale
 
$
46,728

 
$
394

 
$
(972
)
 
$
46,150

__________
(1) 
Includes primarily supranational bonds, foreign government bonds and other asset-backed securities.
Investment Securities Held to Maturity The table below presents the amortized cost, carrying value, gross unrealized gains and losses, and fair value of securities held to maturity as of March 31, 2019 and December 31, 2018.Table 3.2: Investment Securities Held to Maturity
 
 
March 31, 2019
(Dollars in millions)
 
Amortized
Cost
 
Unrealized Losses Recorded in AOCI
 
Carrying Value
 
Gross
Unrealized
Gains
 
Gross
Unrealized
Losses
 
Fair
Value
Agency RMBS
 
$
32,899

 
$
(231
)
 
$
32,668

 
$
608

 
$
(169
)
 
$
33,107

Agency CMBS
 
3,848

 
(13
)
 
3,835

 
50

 
(37
)
 
3,848

Total investment securities held to maturity
 
$
36,747

 
$
(244
)
 
$
36,503

 
$
658

 
$
(206
)
 
$
36,955

 
 
December 31, 2018
(Dollars in millions)
 
Amortized
Cost
 
Unrealized
Losses Recorded in AOCI
 
Carrying Value
 
Gross
Unrealized
Gains
 
Gross
Unrealized
Losses
 
Fair
Value
Agency RMBS
 
$
33,299

 
$
(238
)
 
$
33,061

 
$
293

 
$
(377
)
 
$
32,977

Agency CMBS
 
3,723

 
(13
)
 
3,710

 
21

 
(89
)
 
3,642

Total investment securities held to maturity
 
$
37,022

 
$
(251
)
 
$
36,771

 
$
314

 
$
(466
)
 
$
36,619
Schedule of Available-for-Sale Securities in Gross Unrealized Loss Position The table below provides, by major security type, information about our securities available for sale in a gross unrealized loss position and the length of time that individual securities have been in a continuous unrealized loss position as of March 31, 2019 and December 31, 2018.
Table 3.3: Securities in a Gross Unrealized Loss Position
 
 
March 31, 2019
 
 
Less than 12 Months
 
12 Months or Longer
 
Total
(Dollars in millions)
 
Fair Value
 
Gross
Unrealized
Losses
 
Fair Value
 
Gross
Unrealized
Losses
 
Fair Value
 
Gross
Unrealized
Losses
Investment securities available for sale:
 
 
 
 
 
 
 
 
 
 
 
 
U.S. Treasury securities
 
$
2,583

 
$
(5
)
 
$
1,085

 
$
(5
)
 
$
3,668

 
$
(10
)
RMBS:
 
 
 
 
 
 
 
 
 
 
 
 
Agency
 
1,666

 
(8
)
 
21,986

 
(579
)
 
23,652

 
(587
)
Non-agency
 
61

 
(1
)
 
9

 
(1
)
 
70

 
(2
)
Total RMBS
 
1,727

 
(9
)
 
21,995

 
(580
)
 
23,722

 
(589
)
Agency CMBS
 
499

 
(2
)
 
2,396

 
(46
)
 
2,895

 
(48
)
Other securities
 
309

 
(1
)
 
475

 
(3
)
 
784

 
(4
)
Total investment securities available for sale in a gross unrealized loss position
 
$
5,118

 
$
(17
)
 
$
25,951

 
$
(634
)
 
$
31,069

 
$
(651
)
 
 
December 31, 2018
 
 
Less than 12 Months
 
12 Months or Longer
 
Total
(Dollars in millions)
 
Fair Value
 
Gross
Unrealized
Losses
 
Fair Value
 
Gross
Unrealized
Losses
 
Fair Value
 
Gross
Unrealized
Losses
Investment securities available for sale:
 
 
 
 
 
 
 
 
 
 
 
 
U.S. Treasury securities
 
$
2,543

 
$
(3
)
 
$
1,076

 
$
(14
)
 
$
3,619

 
$
(17
)
RMBS:
 
 
 
 
 
 
 
 
 
 
 
 
Agency
 
7,863

 
(260
)
 
18,118

 
(609
)
 
25,981

 
(869
)
Non-agency
 
89

 
(2
)
 
10

 
0

 
99

 
(2
)
Total RMBS
 
7,952

 
(262
)
 
18,128

 
(609
)
 
26,080

 
(871
)
Agency CMBS
 
2,004

 
(31
)
 
1,540

 
(47
)
 
3,544

 
(78
)
Other securities
 
244

 
(1
)
 
678

 
(5
)
 
922

 
(6
)
Total investment securities available for sale in a gross unrealized loss position
 
$
12,743

 
$
(297
)
 
$
21,422

 
$
(675
)
 
$
34,165

 
$
(972
)
Schedule of Contractual Maturities for Securities The table below summarizes, by major security type, the contractual maturities and weighted-average yields of our investment securities as of March 31, 2019. Because borrowers may have the right to call or prepay certain obligations, the expected maturities of our securities are likely to differ from the scheduled contractual maturities presented below. The weighted-average yield below represents the effective yield for the investment securities and is calculated based on the amortized cost of each security.
Table 3.4: Contractual Maturities and Weighted-Average Yields of Securities
 
 
March 31, 2019
(Dollars in millions)
 
Due in
1 Year or Less
 
Due > 1 Year
through
5 Years
 
Due > 5 Years
through
10 Years
 
Due > 10 Years
 
Total
Fair value of securities available for sale:
U.S. Treasury securities
 
$
448

 
$
294

 
$
3,385

 
$
0

 
$
4,127

RMBS(1):
 
 
 
 
 
 
 
 
 
 
Agency
 
7

 
21

 
780

 
32,337

 
33,145

Non-agency
 
0

 
0

 
0

 
1,720

 
1,720

Total RMBS
 
7

 
21

 
780

 
34,057

 
34,865

Agency CMBS(1)
 
10

 
1,684

 
2,380

 
1,248

 
5,322

Other securities
 
247

 
1,037

 
272

 
18

 
1,574

Total securities available for sale
 
$
712

 
$
3,036

 
$
6,817

 
$
35,323

 
$
45,888

Amortized cost of securities available for sale
 
$
713

 
$
3,053

 
$
6,814

 
$
35,502

 
$
46,082

Weighted-average yield for securities available for sale
 
1.57
%
 
2.46
%
 
2.71
%
 
3.30
%
 
3.13
%
Carrying value of securities held to maturity:
Agency RMBS(1)
 
$
0

 
$
0

 
$
89

 
$
32,579

 
$
32,668

Agency CMBS(1)
 
0

 
68

 
676

 
3,091

 
3,835

Total securities held to maturity
 
$
0

 
$
68

 
$
765

 
$
35,670

 
$
36,503

Fair value of securities held to maturity
 
$
0

 
$
70

 
$
773

 
$
36,112

 
$
36,955

Weighted-average yield for securities held to maturity
 
N/A

 
3.55
%
 
3.16
%
 
3.37
%
 
3.36
%
__________
(1) 
As of March 31, 2019, the weighted-average expected maturities of RMBS and Agency CMBS are 5.9 years and 5.6 years, respectively.
Schedule of Gross Realized Gains and Losses on Sale of Available-for-Sale Securities Recognized in Earnings The following table presents the gross realized gains or losses and proceeds from the sale of securities available for sale for the three months ended March 31, 2019 and 2018. We did not recognize any OTTI and did not sell any investment securities that are classified as held to maturity for the three months ended March 31, 2019 and 2018.
Table 3.5: Realized Gains on Securities
 
 
Three Months Ended March 31,
(Dollars in millions)
 
2019
 
2018
Realized gains:
 
 
 
 
Gross realized gains
 
$
24

 
$
8

Net securities gains
 
$
24

 
$
8

Total proceeds from sales
 
$
3,074

 
$
1,058
Schedule of Outstanding Contractual Balance and Carrying Value of Credit-Impaired Debt Securities The table below presents the outstanding balance and carrying value of the purchased credit-impaired debt securities as of March 31, 2019 and December 31, 2018.
Table 3.6: Outstanding Balance and Carrying Value of Purchased Credit-Impaired Debt Securities
(Dollars in millions)
 
March 31, 2019
 
December 31, 2018
Outstanding balance
 
$
1,723

 
$
1,784

Carrying value
 
1,522

 
1,537
Schedule of Changes in Accretable Yield of Acquired Securities The following table presents changes in the accretable yield related to the purchased credit-impaired debt securities for the three months ended March 31, 2019 and 2018.Table 3.7: Changes in the Accretable Yield of Purchased Credit-Impaired Debt Securities
 
 
Three Months Ended March 31,
(Dollars in millions)
 
2019
 
2018
Accretable yield, beginning of period
 
$
698

 
$
826

Accretion recognized in earnings
 
(43
)
 
(39
)
Reduction due to payoffs, disposals, transfers and other
 
(1
)
 
(1
)
Net reclassifications (to) from nonaccretable difference
 
(18
)
 
8

Accretable yield, end of period
 
$
636

 
$
794