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Fair Value (Tables)
12 Months Ended
Dec. 31, 2015
Fair Value Disclosures [Abstract]  
Recurring Fair Value Measurements
The assets and liabilities measured at estimated fair value on a recurring basis and their corresponding placement in the fair value hierarchy, including those items for which the Company has elected the FVO, are presented below.
 
 
December 31, 2015
 
 
Fair Value Hierarchy
 
 
 
 
Level 1
 
Level 2
 
Level 3
 
Total Estimated
Fair Value
 
 
(In millions)
Assets
 
 
 
 
 
 
 
 
Fixed maturity securities:
 
 
 
 
 
 
 
 
U.S. corporate
 
$

 
$
93,758

 
$
7,036

 
$
100,794

U.S. Treasury and agency
 
37,660

 
23,986

 

 
61,646

Foreign corporate
 

 
51,438

 
5,760

 
57,198

Foreign government
 

 
49,643

 
856

 
50,499

RMBS
 

 
34,088

 
4,709

 
38,797

State and political subdivision
 

 
15,395

 
46

 
15,441

ABS
 

 
12,731

 
1,663

 
14,394

CMBS
 

 
11,889

 
744

 
12,633

Total fixed maturity securities
 
37,660

 
292,928

 
20,814

 
351,402

Equity securities
 
1,274

 
1,615

 
432

 
3,321

FVO and trading securities:
 
 
 
 
 
 
 
 
Actively traded securities
 

 
400

 
4

 
404

FVO general account securities
 
506

 
32

 
89

 
627

FVO contractholder-directed unit-linked investments
 
10,829

 
2,985

 
167

 
13,981

FVO securities held by CSEs
 

 
2

 
10

 
12

Total FVO and trading securities
 
11,335

 
3,419

 
270

 
15,024

Short-term investments (1)
 
2,543

 
5,985

 
291

 
8,819

Mortgage loans:
 
 
 
 
 
 
 
 
Residential mortgage loans — FVO
 

 

 
314

 
314

Commercial mortgage loans held by CSEs — FVO
 

 
172

 

 
172

Total mortgage loans
 

 
172

 
314

 
486

Other invested assets:
 
 
 
 
 
 
 
 
Other investments
 
109

 
53

 

 
162

Derivative assets: (2)
 
 
 
 
 
 
 
 
Interest rate
 
4

 
9,405

 
25

 
9,434

Foreign currency exchange rate
 

 
3,003

 
16

 
3,019

Credit
 

 
99

 
7

 
106

Equity market
 
63

 
1,435

 
349

 
1,847

Total derivative assets
 
67

 
13,942

 
397

 
14,406

Total other invested assets
 
176

 
13,995

 
397

 
14,568

Net embedded derivatives within asset host contracts (3)
 

 

 
391

 
391

Separate account assets (4)
 
77,080

 
222,814

 
1,704

 
301,598

Total assets
 
$
130,068

 
$
540,928

 
$
24,613

 
$
695,609

Liabilities
 
 
 
 
 
 
 
 
Derivative liabilities: (2)
 
 
 
 
 
 
 
 
Interest rate
 
$
7

 
$
2,340

 
$

 
$
2,347

Foreign currency exchange rate
 

 
2,754

 
148

 
2,902

Credit
 

 
45

 
2

 
47

Equity market
 
18

 
1,077

 
658

 
1,753

Total derivative liabilities
 
25

 
6,216

 
808

 
7,049

Net embedded derivatives within liability host contracts (3)
 

 

 
935

 
935

Long-term debt of CSEs — FVO
 

 
49

 
11

 
60

Trading liabilities (5)
 
103

 
50

 

 
153

Total liabilities
 
$
128

 
$
6,315

 
$
1,754

 
$
8,197

 
 
December 31, 2014
 
 
Fair Value Hierarchy
 
 
 
 
Level 1
 
Level 2
 
Level 3
 
Total Estimated
Fair Value
 
 
(In millions)
Assets
 
 
 
 
 
 
 
 
Fixed maturity securities:
 
 
 
 
 
 
 
 
U.S. corporate
 
$

 
$
99,012

 
$
6,942

 
$
105,954

U.S. Treasury and agency
 
36,879

 
24,637

 

 
61,516

Foreign corporate
 

 
55,185

 
6,490

 
61,675

Foreign government
 

 
51,355

 
1,311

 
52,666

RMBS
 

 
35,463

 
4,383

 
39,846

State and political subdivision
 

 
15,187

 

 
15,187

ABS
 

 
12,005

 
2,244

 
14,249

CMBS
 

 
13,567

 
765

 
14,332

Total fixed maturity securities
 
36,879

 
306,411

 
22,135

 
365,425

Equity securities
 
1,558

 
1,728

 
345

 
3,631

FVO and trading securities:
 
 
 
 
 
 
 
 
Actively traded securities
 
22

 
627

 
5

 
654

FVO general account securities
 
552

 
57

 
95

 
704

FVO contractholder-directed unit-linked investments
 
11,064

 
3,797

 
455

 
15,316

FVO securities held by CSEs
 

 
3

 
12

 
15

Total FVO and trading securities
 
11,638

 
4,484

 
567

 
16,689

Short-term investments (1)
 
2,104

 
5,223

 
336

 
7,663

Mortgage loans:
 
 
 
 
 
 
 
 
Residential mortgage loans — FVO
 

 

 
308

 
308

Commercial mortgage loans held by CSEs — FVO
 

 
280

 

 
280

Total mortgage loans
 

 
280

 
308

 
588

Other invested assets:
 
 
 
 
 
 
 
 
Other investments
 
203

 
61

 

 
264

Derivative assets: (2)
 
 
 
 
 
 
 
 
Interest rate
 
4

 
8,988

 
63

 
9,055

Foreign currency exchange rate
 
2

 
2,472

 
25

 
2,499

Credit
 

 
175

 
14

 
189

Equity market
 
65

 
1,287

 
357

 
1,709

Total derivative assets
 
71

 
12,922

 
459

 
13,452

Total other invested assets
 
274

 
12,983

 
459

 
13,716

Net embedded derivatives within asset host contracts (3)
 

 

 
377

 
377

Separate account assets (4)
 
83,533

 
231,539

 
1,922

 
316,994

Total assets
 
$
135,986

 
$
562,648

 
$
26,449

 
$
725,083

Liabilities
 
 
 
 
 
 
 
 
Derivative liabilities: (2)
 
 
 
 
 
 
 
 
Interest rate
 
$
9

 
$
2,347

 
$

 
$
2,356

Foreign currency exchange rate
 

 
2,755

 
93

 
2,848

Credit
 

 
38

 
2

 
40

Equity market
 
2

 
1,112

 
664

 
1,778

Total derivative liabilities
 
11

 
6,252

 
759

 
7,022

Net embedded derivatives within liability host contracts (3)
 

 
7

 
(53
)
 
(46
)
Long-term debt of CSEs — FVO
 

 
138

 
13

 
151

Trading liabilities (5)
 
215

 
24

 

 
239

Total liabilities
 
$
226

 
$
6,421

 
$
719

 
$
7,366

______________
(1)
Short-term investments as presented in the tables above differ from the amounts presented on the consolidated balance sheets because certain short-term investments are not measured at estimated fair value on a recurring basis.
(2)
Derivative assets are presented within other invested assets on the consolidated balance sheets and derivative liabilities are presented within other liabilities on the consolidated balance sheets. The amounts are presented gross in the tables above to reflect the presentation on the consolidated balance sheets, but are presented net for purposes of the rollforward in the Fair Value Measurements Using Significant Unobservable Inputs (Level 3) tables.
(3)
Net embedded derivatives within asset host contracts are presented primarily within premiums, reinsurance and other receivables on the consolidated balance sheets. Net embedded derivatives within liability host contracts are presented within policyholder account balances, future policy benefits and other liabilities on the consolidated balance sheets. At December 31, 2015 and 2014, debt and equity securities also included embedded derivatives of ($220) million and ($217) million, respectively.
(4)
Investment performance related to separate account assets is fully offset by corresponding amounts credited to contractholders whose liability is reflected within separate account liabilities. Separate account liabilities are set equal to the estimated fair value of separate account assets.
(5)
Trading liabilities are presented within other liabilities on the consolidated balance sheets.
Fair Value Inputs, Quantitative Information
The following table presents certain quantitative information about the significant unobservable inputs used in the fair value measurement, and the sensitivity of the estimated fair value to changes in those inputs, for the more significant asset and liability classes measured at fair value on a recurring basis using significant unobservable inputs (Level 3) at:
 
 
 
 
 
 
 
December 31, 2015
 
December 31, 2014
 
Impact of
Increase in Input
on Estimated
Fair Value (2)
 
Valuation Techniques
 
Significant
Unobservable Inputs
 
Range
 
Weighted
Average (1)
 
Range
 
Weighted
Average (1)
 
Fixed maturity securities (3)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
U.S. corporate and foreign corporate
Matrix pricing
 
Delta spread adjustments (4)
 
(65)
-
240
 
39
 
(40)
-
240
 
46
 
Decrease
 
Market pricing
 
Quoted prices (5)
 
-
780
 
156
 
-
750
 
151
 
Increase
 
Consensus pricing
 
Offered quotes (5)
 
68
-
121
 
98
 
31
-
126
 
99
 
Increase
Foreign government
Market pricing
 
Quoted prices (5)
 
96
-
135
 
113
 
92
-
189
 
106
 
Increase
RMBS
Market pricing
 
Quoted prices (5)
 
19
-
292
 
92
 
22
-
120
 
97
 
Increase (6)
ABS
Market pricing
 
Quoted prices (5)
 
16
-
109
 
100
 
15
-
110
 
100
 
Increase (6)
 
Consensus pricing
 
Offered quotes (5)
 
66
-
105
 
99
 
56
-
106
 
102
 
Increase (6)
Derivatives
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Interest rate
Present value techniques
 
Swap yield (7)
 
307
-
317
 
 
 
278
-
297
 
 
 
Increase (12)
Foreign currency exchange rate
Present value techniques
 
Swap yield (7)
 
28
-
381
 
 
 
62
-
2,430
 
 
 
Increase (12)
 
 
 
 
Correlation (8)
 
-
 
 
 
40%
-
55%
 
 
 
 
Credit
Present value techniques
 
Credit spreads (9)
 
98
-
100
 
 
 
98
-
100
 
 
 
Decrease (9)
 
Consensus pricing
 
Offered quotes (10)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Equity market
Present value techniques or option pricing models
 
Volatility (11)
 
15%
-
36%
 
 
 
15%
-
27%
 
 
 
Increase (12)
 
 
 
 
Correlation (8)
 
70%
-
70%
 
 
 
70%
-
70%
 
 
 
 
Embedded derivatives
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Direct and assumed guaranteed minimum benefits
Option pricing techniques
 
Mortality rates:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Ages 0 - 40
 
0%
-
0.21%
 
 
 
0%
-
0.28%
 
 
 
Decrease (13)
 
 
 
 
 
Ages 41 - 60
 
0.01%
-
0.78%
 
 
 
0.04%
-
0.88%
 
 
 
Decrease (13)
 
 
 
 
 
Ages 61 - 115
 
0.04%
-
100%
 
 
 
0.26%
-
100%
 
 
 
Decrease (13)
 
 
 
 
Lapse rates:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Durations 1 - 10
 
0.25%
-
100%
 
 
 
0.50%
-
100%
 
 
 
Decrease (14)
 
 
 
 
 
Durations 11 - 20
 
2%
-
100%
 
 
 
2%
-
100%
 
 
 
Decrease (14)
 
 
 
 
 
Durations 21 - 116
 
1%
-
100%
 
 
 
2%
-
100%
 
 
 
Decrease (14)
 
 
 
 
Utilization rates
 
0%
-
25%
 
 
 
20%
-
50%
 
 
 
Increase (15)
 
 
 
 
Withdrawal rates
 
0%
-
20%
 
 
 
0%
-
20%
 
 
 
(16)
 
 
 
 
Long-term equity volatilities
 
8.79%
-
33%
 
 
 
7.30%
-
33%
 
 
 
Increase (17)
 
 
 
 
Nonperformance risk spread
 
(0.47)%
-
1.31%
 
 
 
(0.35)%
-
0.81%
 
 
 
Decrease (18)
______________
(1)
The weighted average for fixed maturity securities is determined based on the estimated fair value of the securities.
(2)
The impact of a decrease in input would have the opposite impact on the estimated fair value. For embedded derivatives, changes are based on liability positions.
(3)
Significant increases (decreases) in expected default rates in isolation would result in substantially lower (higher) valuations.
(4)
Range and weighted average are presented in basis points.
(5)
Range and weighted average are presented in accordance with the market convention for fixed maturity securities of dollars per hundred dollars of par.
(6)
Changes in the assumptions used for the probability of default is accompanied by a directionally similar change in the assumption used for the loss severity and a directionally opposite change in the assumptions used for prepayment rates.
(7)
Ranges represent the rates across different yield curves and are presented in basis points. The swap yield curve is utilized among different types of derivatives to project cash flows, as well as to discount future cash flows to present value. Since this valuation methodology uses a range of inputs across a yield curve to value the derivative, presenting a range is more representative of the unobservable input used in the valuation.
(8)
Ranges represent the different correlation factors utilized as components within the valuation methodology. Presenting a range of correlation factors is more representative of the unobservable input used in the valuation. Increases (decreases) in correlation in isolation will increase (decrease) the significance of the change in valuations.
(9)
Represents the risk quoted in basis points of a credit default event on the underlying instrument. Credit derivatives with significant unobservable inputs are primarily comprised of written credit default swaps.
(10)
At both December 31, 2015 and 2014, independent non-binding broker quotations were used in the determination of less than 1% of the total net derivative estimated fair value.
(11)
Ranges represent the underlying equity volatility quoted in percentage points. Since this valuation methodology uses a range of inputs across multiple volatility surfaces to value the derivative, presenting a range is more representative of the unobservable input used in the valuation.
(12)
Changes are based on long U.S. dollar net asset positions and will be inversely impacted for short U.S. dollar net asset positions.
(13)
Mortality rates vary by age and by demographic characteristics such as gender. Mortality rate assumptions are based on company experience. A mortality improvement assumption is also applied. For any given contract, mortality rates vary throughout the period over which cash flows are projected for purposes of valuing the embedded derivative.
(14)
Base lapse rates are adjusted at the contract level based on a comparison of the actuarially calculated guaranteed values and the current policyholder account value, as well as other factors, such as the applicability of any surrender charges. A dynamic lapse function reduces the base lapse rate when the guaranteed amount is greater than the account value as in the money contracts are less likely to lapse. Lapse rates are also generally assumed to be lower in periods when a surrender charge applies. For any given contract, lapse rates vary throughout the period over which cash flows are projected for purposes of valuing the embedded derivative.
(15)
The utilization rate assumption estimates the percentage of contract holders with a GMIB or lifetime withdrawal benefit who will elect to utilize the benefit upon becoming eligible. The rates may vary by the type of guarantee, the amount by which the guaranteed amount is greater than the account value, the contract’s withdrawal history and by the age of the policyholder. For any given contract, utilization rates vary throughout the period over which cash flows are projected for purposes of valuing the embedded derivative.
(16)
The withdrawal rate represents the percentage of account balance that any given policyholder will elect to withdraw from the contract each year. The withdrawal rate assumption varies by age and duration of the contract, and also by other factors such as benefit type. For any given contract, withdrawal rates vary throughout the period over which cash flows are projected for purposes of valuing the embedded derivative. For GMWBs, any increase (decrease) in withdrawal rates results in an increase (decrease) in the estimated fair value of the guarantees. For GMABs and GMIBs, any increase (decrease) in withdrawal rates results in a decrease (increase) in the estimated fair value.
(17)
Long-term equity volatilities represent equity volatility beyond the period for which observable equity volatilities are available. For any given contract, long-term equity volatility rates vary throughout the period over which cash flows are projected for purposes of valuing the embedded derivative.
(18)
Nonperformance risk spread varies by duration and by currency. For any given contract, multiple nonperformance risk spreads will apply, depending on the duration of the cash flow being discounted for purposes of valuing the embedded derivative.
Fair Value Inputs, Quantitative Information
The following table presents certain quantitative information about the significant unobservable inputs used in the fair value measurement, and the sensitivity of the estimated fair value to changes in those inputs, for the more significant asset and liability classes measured at fair value on a recurring basis using significant unobservable inputs (Level 3) at:
 
 
 
 
 
 
 
December 31, 2015
 
December 31, 2014
 
Impact of
Increase in Input
on Estimated
Fair Value (2)
 
Valuation Techniques
 
Significant
Unobservable Inputs
 
Range
 
Weighted
Average (1)
 
Range
 
Weighted
Average (1)
 
Fixed maturity securities (3)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
U.S. corporate and foreign corporate
Matrix pricing
 
Delta spread adjustments (4)
 
(65)
-
240
 
39
 
(40)
-
240
 
46
 
Decrease
 
Market pricing
 
Quoted prices (5)
 
-
780
 
156
 
-
750
 
151
 
Increase
 
Consensus pricing
 
Offered quotes (5)
 
68
-
121
 
98
 
31
-
126
 
99
 
Increase
Foreign government
Market pricing
 
Quoted prices (5)
 
96
-
135
 
113
 
92
-
189
 
106
 
Increase
RMBS
Market pricing
 
Quoted prices (5)
 
19
-
292
 
92
 
22
-
120
 
97
 
Increase (6)
ABS
Market pricing
 
Quoted prices (5)
 
16
-
109
 
100
 
15
-
110
 
100
 
Increase (6)
 
Consensus pricing
 
Offered quotes (5)
 
66
-
105
 
99
 
56
-
106
 
102
 
Increase (6)
Derivatives
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Interest rate
Present value techniques
 
Swap yield (7)
 
307
-
317
 
 
 
278
-
297
 
 
 
Increase (12)
Foreign currency exchange rate
Present value techniques
 
Swap yield (7)
 
28
-
381
 
 
 
62
-
2,430
 
 
 
Increase (12)
 
 
 
 
Correlation (8)
 
-
 
 
 
40%
-
55%
 
 
 
 
Credit
Present value techniques
 
Credit spreads (9)
 
98
-
100
 
 
 
98
-
100
 
 
 
Decrease (9)
 
Consensus pricing
 
Offered quotes (10)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Equity market
Present value techniques or option pricing models
 
Volatility (11)
 
15%
-
36%
 
 
 
15%
-
27%
 
 
 
Increase (12)
 
 
 
 
Correlation (8)
 
70%
-
70%
 
 
 
70%
-
70%
 
 
 
 
Embedded derivatives
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Direct and assumed guaranteed minimum benefits
Option pricing techniques
 
Mortality rates:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Ages 0 - 40
 
0%
-
0.21%
 
 
 
0%
-
0.28%
 
 
 
Decrease (13)
 
 
 
 
 
Ages 41 - 60
 
0.01%
-
0.78%
 
 
 
0.04%
-
0.88%
 
 
 
Decrease (13)
 
 
 
 
 
Ages 61 - 115
 
0.04%
-
100%
 
 
 
0.26%
-
100%
 
 
 
Decrease (13)
 
 
 
 
Lapse rates:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Durations 1 - 10
 
0.25%
-
100%
 
 
 
0.50%
-
100%
 
 
 
Decrease (14)
 
 
 
 
 
Durations 11 - 20
 
2%
-
100%
 
 
 
2%
-
100%
 
 
 
Decrease (14)
 
 
 
 
 
Durations 21 - 116
 
1%
-
100%
 
 
 
2%
-
100%
 
 
 
Decrease (14)
 
 
 
 
Utilization rates
 
0%
-
25%
 
 
 
20%
-
50%
 
 
 
Increase (15)
 
 
 
 
Withdrawal rates
 
0%
-
20%
 
 
 
0%
-
20%
 
 
 
(16)
 
 
 
 
Long-term equity volatilities
 
8.79%
-
33%
 
 
 
7.30%
-
33%
 
 
 
Increase (17)
 
 
 
 
Nonperformance risk spread
 
(0.47)%
-
1.31%
 
 
 
(0.35)%
-
0.81%
 
 
 
Decrease (18)
______________
(1)
The weighted average for fixed maturity securities is determined based on the estimated fair value of the securities.
(2)
The impact of a decrease in input would have the opposite impact on the estimated fair value. For embedded derivatives, changes are based on liability positions.
(3)
Significant increases (decreases) in expected default rates in isolation would result in substantially lower (higher) valuations.
(4)
Range and weighted average are presented in basis points.
(5)
Range and weighted average are presented in accordance with the market convention for fixed maturity securities of dollars per hundred dollars of par.
(6)
Changes in the assumptions used for the probability of default is accompanied by a directionally similar change in the assumption used for the loss severity and a directionally opposite change in the assumptions used for prepayment rates.
(7)
Ranges represent the rates across different yield curves and are presented in basis points. The swap yield curve is utilized among different types of derivatives to project cash flows, as well as to discount future cash flows to present value. Since this valuation methodology uses a range of inputs across a yield curve to value the derivative, presenting a range is more representative of the unobservable input used in the valuation.
(8)
Ranges represent the different correlation factors utilized as components within the valuation methodology. Presenting a range of correlation factors is more representative of the unobservable input used in the valuation. Increases (decreases) in correlation in isolation will increase (decrease) the significance of the change in valuations.
(9)
Represents the risk quoted in basis points of a credit default event on the underlying instrument. Credit derivatives with significant unobservable inputs are primarily comprised of written credit default swaps.
(10)
At both December 31, 2015 and 2014, independent non-binding broker quotations were used in the determination of less than 1% of the total net derivative estimated fair value.
(11)
Ranges represent the underlying equity volatility quoted in percentage points. Since this valuation methodology uses a range of inputs across multiple volatility surfaces to value the derivative, presenting a range is more representative of the unobservable input used in the valuation.
(12)
Changes are based on long U.S. dollar net asset positions and will be inversely impacted for short U.S. dollar net asset positions.
(13)
Mortality rates vary by age and by demographic characteristics such as gender. Mortality rate assumptions are based on company experience. A mortality improvement assumption is also applied. For any given contract, mortality rates vary throughout the period over which cash flows are projected for purposes of valuing the embedded derivative.
(14)
Base lapse rates are adjusted at the contract level based on a comparison of the actuarially calculated guaranteed values and the current policyholder account value, as well as other factors, such as the applicability of any surrender charges. A dynamic lapse function reduces the base lapse rate when the guaranteed amount is greater than the account value as in the money contracts are less likely to lapse. Lapse rates are also generally assumed to be lower in periods when a surrender charge applies. For any given contract, lapse rates vary throughout the period over which cash flows are projected for purposes of valuing the embedded derivative.
(15)
The utilization rate assumption estimates the percentage of contract holders with a GMIB or lifetime withdrawal benefit who will elect to utilize the benefit upon becoming eligible. The rates may vary by the type of guarantee, the amount by which the guaranteed amount is greater than the account value, the contract’s withdrawal history and by the age of the policyholder. For any given contract, utilization rates vary throughout the period over which cash flows are projected for purposes of valuing the embedded derivative.
(16)
The withdrawal rate represents the percentage of account balance that any given policyholder will elect to withdraw from the contract each year. The withdrawal rate assumption varies by age and duration of the contract, and also by other factors such as benefit type. For any given contract, withdrawal rates vary throughout the period over which cash flows are projected for purposes of valuing the embedded derivative. For GMWBs, any increase (decrease) in withdrawal rates results in an increase (decrease) in the estimated fair value of the guarantees. For GMABs and GMIBs, any increase (decrease) in withdrawal rates results in a decrease (increase) in the estimated fair value.
(17)
Long-term equity volatilities represent equity volatility beyond the period for which observable equity volatilities are available. For any given contract, long-term equity volatility rates vary throughout the period over which cash flows are projected for purposes of valuing the embedded derivative.
(18)
Nonperformance risk spread varies by duration and by currency. For any given contract, multiple nonperformance risk spreads will apply, depending on the duration of the cash flow being discounted for purposes of valuing the embedded derivative.
Fair Value, Measured on Recurring Basis, Unobservable Input Reconciliation
The following tables summarize the change of all assets and (liabilities) measured at estimated fair value on a recurring basis using significant unobservable inputs (Level 3):
 
 
Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
 
 
Fixed Maturity Securities
 
 
 
 
 
 
Corporate (1)
 
U.S.
Treasury
and Agency 
 
Foreign
Government
 
Structured (2)
 
State and
Political
Subdivision
 
Equity
Securities
 
FVO and
Trading
Securities (3
)
 
 
(In millions)
Balance, January 1, 2014
 
$
13,852

 
$
62

 
$
2,235

 
$
8,139

 
$
10

 
$
572

 
$
644

Total realized/unrealized gains (losses) included in net income (loss) (4) (5)
 
13

 

 
61

 
14

 

 
17

 
8

Total realized/unrealized gains (losses) included in AOCI
 
353

 

 
(110
)
 
69

 

 
(80
)
 

Purchases (6)
 
2,928

 

 
363

 
3,704

 

 
30

 
302

Sales (6)
 
(1,808
)
 

 
(273
)
 
(2,016
)
 

 
(101
)
 
(484
)
Issuances (6)
 

 

 

 

 

 

 

Settlements (6)
 

 

 

 

 

 

 

Transfers into Level 3 (7)
 
526

 

 
253

 
149

 

 
7

 
147

Transfers out of Level 3 (7)
 
(2,432
)
 
(62
)
 
(1,218
)
 
(2,667
)
 
(10
)
 
(100
)
 
(50
)
Balance, December 31, 2014
 
13,432

 

 
1,311

 
7,392

 

 
345

 
567

Total realized/unrealized gains (losses) included in net income (loss) (4) (5)
 
69

 

 
13

 
124

 

 
22

 
(30
)
Total realized/unrealized gains (losses) included in AOCI
 
(761
)
 

 
(25
)
 
(91
)
 

 
(64
)
 

Purchases (6)
 
2,556

 

 
212

 
3,167

 
46

 
128

 
51

Sales (6)
 
(1,425
)
 

 
(45
)
 
(1,585
)
 

 
(96
)
 
(127
)
Issuances (6)
 

 

 

 

 

 

 

Settlements (6)
 

 

 

 

 

 

 

Transfers into Level 3 (7)
 
918

 

 
7

 
66

 

 
107

 
56

Transfers out of Level 3 (7)
 
(1,993
)
 

 
(617
)
 
(1,957
)
 

 
(10
)
 
(247
)
Balance, December 31, 2015
 
$
12,796

 
$

 
$
856

 
$
7,116

 
$
46

 
$
432

 
$
270

Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at December 31, 2013: (8)
 
$
(26
)
 
$

 
$
9

 
$
25

 
$

 
$
(23
)
 
$
4

Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at December 31, 2014: (8)
 
$
13

 
$

 
$
12

 
$
39

 
$

 
$
(5
)
 
$
(7
)
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at December 31, 2015: (8)
 
$
24

 
$

 
$
12

 
$
125

 
$

 
$
(1
)
 
$
(27
)
Gains (Losses) Data for the year ended December 31, 2013
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Total realized/unrealized gains (losses) included in net income (loss) (4) (5)
 
$
(45
)
 
$

 
$
17

 
$
32

 
$

 
$
(6
)
 
$
4

Total realized/unrealized gains (losses) included in AOCI
 
$
(169
)
 
$
(3
)
 
$
(84
)
 
$
40

 
$
(1
)
 
$
100

 
$

 
 
Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
 
 
Short-term
Investments
 
Mortgage
Loans (9)
 
Net
Derivatives (10)
 
Net Embedded
Derivatives (11)
 
Separate
Account
Assets (12)
 
Long-term
Debt of
CSEs — FVO
 
 
(In millions)
Balance, January 1, 2014
 
$
254

 
$
338

 
$
(286
)
 
$
1,258

 
$
1,465

 
$
(28
)
Total realized/unrealized gains (losses) included in net income (loss) (4) (5)
 
1

 
20

 
(83
)
 
(173
)
 
103

 
(1
)
Total realized/unrealized gains (losses) included in AOCI
 

 

 
101

 
191

 

 

Purchases (6)
 
335

 
124

 
7

 

 
657

 

Sales (6)
 
(236
)
 
(120
)
 

 

 
(459
)
 

Issuances (6)
 

 

 
(4
)
 

 
81

 

Settlements (6)
 

 
(54
)
 
(35
)
 
(846
)
 
(28
)
 
16

Transfers into Level 3 (7)
 

 

 

 

 
147

 

Transfers out of Level 3 (7)
 
(18
)
 

 

 

 
(44
)
 

Balance, December 31, 2014
 
336

 
308

 
(300
)
 
430

 
1,922

 
(13
)
Total realized/unrealized gains (losses) included in net income (loss) (4) (5)
 
1

 
20

 
(223
)
 
(159
)
 
8

 

Total realized/unrealized gains (losses) included in AOCI
 
(1
)
 

 

 
2

 

 

Purchases (6)
 
292

 
136

 
24

 

 
572

 

Sales (6)
 
(27
)
 
(121
)
 

 

 
(527
)
 

Issuances (6)
 

 

 

 

 
98

 

Settlements (6)
 

 
(29
)
 
88

 
(817
)
 
(60
)
 
2

Transfers into Level 3 (7)
 

 

 

 

 
1

 

Transfers out of Level 3 (7)
 
(310
)
 

 

 

 
(310
)
 

Balance, December 31, 2015
 
$
291

 
$
314

 
$
(411
)
 
$
(544
)
 
$
1,704

 
$
(11
)
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at December 31, 2013: (8)
 
$
2

 
$
1

 
$
(508
)
 
$
4,887

 
$

 
$

Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at December 31, 2014: (8)
 
$
1

 
$
20

 
$
(67
)
 
$
(173
)
 
$

 
$
(1
)
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at December 31, 2015: (8)
 
$

 
$
20

 
$
(234
)
 
$
(176
)
 
$

 
$

Gains (Losses) Data for the year ended December 31, 2013
 
 
 
 
 
 
 
 
 
 
 
 
Total realized/unrealized gains (losses) included in net income (loss) (4) (5)
 
$
(20
)
 
$
1

 
$
(537
)
 
$
4,902

 
$
35

 
$
(2
)
Total realized/unrealized gains (losses) included in AOCI
 
$
17

 
$

 
$
(103
)
 
$
300

 
$

 
$


______________
(1)
Comprised of U.S. and foreign corporate securities.
(2)
Comprised of RMBS, ABS, and CMBS.
(3)
Comprised of Actively traded securities, FVO general account securities, FVO contractholder-directed unit-linked investments and FVO securities held by CSEs.
(4)
Amortization of premium/accretion of discount is included within net investment income. Impairments charged to net income (loss) on securities are included in net investment gains (losses), while changes in estimated fair value of residential mortgage loans — FVO are included in net investment income. Lapses associated with net embedded derivatives are included in net derivative gains (losses). Substantially all realized/unrealized gains (losses) included in net income for net derivatives and net embedded derivatives are reported in net derivatives gains (losses).
(5)
Interest and dividend accruals, as well as cash interest coupons and dividends received, are excluded from the rollforward.
(6)
Items purchased/issued and then sold/settled in the same period are excluded from the rollforward. Fees attributed to embedded derivatives are included in settlements.
(7)
Gains and losses, in net income (loss) and OCI, are calculated assuming transfers into and/or out of Level 3 occurred at the beginning of the period. Items transferred into and then out of Level 3 in the same period are excluded from the rollforward.
(8)
Changes in unrealized gains (losses) included in net income (loss) relate to assets and liabilities still held at the end of the respective periods. Substantially all changes in unrealized gains (losses) included in net income (loss) for net derivatives and net embedded derivatives are reported in net derivative gains (losses).
(9)
Comprised of residential mortgage loans — FVO.
(10)
Freestanding derivative assets and liabilities are presented net for purposes of the rollforward.
(11)
Embedded derivative assets and liabilities are presented net for purposes of the rollforward.
(12)
Investment performance related to separate account assets is fully offset by corresponding amounts credited to contractholders within separate account liabilities. Therefore, such changes in estimated fair value are not recorded in net income. For the purpose of this disclosure, these changes are presented within net investment gains (losses).
Fair Value Option
The following table presents information for certain assets and liabilities accounted for under the FVO. These assets and liabilities were initially measured at fair value.
 
 
Residential Mortgage
Loans — FVO
 
Certain Assets
and Liabilities
of CSEs — FVO (1)
 
 
December 31,
 
December 31,
 
 
2015
 
2014
 
2015
 
2014
 
 
(In millions)
Assets
 
 
 
 
 
 
 
 
Unpaid principal balance
 
$
436

 
$
436

 
$
121

 
$
223

Difference between estimated fair value and unpaid principal balance
 
(122
)
 
(128
)
 
51

 
57

Carrying value at estimated fair value
 
$
314

 
$
308

 
$
172

 
$
280

Loans in non-accrual status
 
$
122

 
$
125

 
$

 
$

Liabilities
 
 
 
 
 
 
 
 
Contractual principal balance
 
 
 
 
 
$
71

 
$
159

Difference between estimated fair value and contractual principal balance
 
 
 
 
 
(11
)
 
(8
)
Carrying value at estimated fair value
 
 
 
 
 
$
60

 
$
151

______________
(1)
These assets and liabilities are comprised of commercial mortgage loans and long-term debt. Changes in estimated fair value on these assets and liabilities and gains or losses on sales of these assets are recognized in net investment gains (losses). Interest income on commercial mortgage loans held by CSEs — FVO is recognized in net investment income. Interest expense from long-term debt of CSEs — FVO is recognized in other expenses.
Nonrecurring Fair Value Measurements
The following table presents information for assets measured at estimated fair value on a nonrecurring basis during the periods and still held at the reporting dates (for example, when there is evidence of impairment). The estimated fair values for these assets were determined using significant unobservable inputs (Level 3).
 
At December 31,
 
Years Ended December 31,
 
2015
 
2014
 
2013
 
2015
 
2014
 
2013
 
Carrying Value After Measurement
 
Gains (Losses)
 
(In millions)
Mortgage loans: (1)
$
44

 
$
97

 
$
214

 
$
(1
)
 
$
2

 
$
20

Other limited partnership interests (2)
$
59

 
$
147

 
$
77

 
$
(32
)
 
$
(76
)
 
$
(46
)
______________
(1)
Estimated fair values for impaired mortgage loans are based on independent broker quotations or valuation models using unobservable inputs or, if the loans are in foreclosure or are otherwise determined to be collateral dependent, are based on the estimated fair value of the underlying collateral or the present value of the expected future cash flows.
(2)
For these cost method investments, estimated fair value is determined from information provided in the financial statements of the underlying entities including NAV data. These investments include private equity and debt funds that typically invest primarily in various strategies including domestic and international leveraged buyout funds; power, energy, timber and infrastructure development funds; venture capital funds; and below investment grade debt and mezzanine debt funds. Distributions will be generated from investment gains, from operating income from the underlying investments of the funds and from liquidation of the underlying assets of the funds. It is estimated that the underlying assets of the funds will be liquidated over the next two to 10 years. Unfunded commitments for these investments at both December 31, 2015 and 2014 were not significant.
Fair Value of Financial Instruments Carried at Other Than Fair Value
The carrying values and estimated fair values for such financial instruments, and their corresponding placement in the fair value hierarchy, are summarized as follows at:
 
 
December 31, 2015
 
 
 
 
Fair Value Hierarchy
 
 
 
 
Carrying
Value
 
Level 1
 
Level 2
 
Level 3
 
Total
Estimated
Fair Value
 
 
(In millions)
Assets
 
 
 
 
 
 
 
 
 
 
Mortgage loans
 
$
66,616

 
$

 
$

 
$
68,539

 
$
68,539

Policy loans
 
$
11,258

 
$

 
$
1,279

 
$
12,072

 
$
13,351

Real estate joint ventures
 
$
35

 
$

 
$

 
$
104

 
$
104

Other limited partnership interests
 
$
524

 
$

 
$

 
$
615

 
$
615

Other invested assets
 
$
537

 
$
155

 
$
2

 
$
380

 
$
537

Premiums, reinsurance and other receivables
 
$
2,822

 
$

 
$
484

 
$
2,421

 
$
2,905

Other assets
 
$
235

 
$

 
$
207

 
$
60

 
$
267

Liabilities
 
 
 
 
 
 
 
 
 
 
Policyholder account balances
 
$
125,040

 
$

 
$

 
$
130,125

 
$
130,125

Long-term debt
 
$
17,954

 
$

 
$
19,360

 
$

 
$
19,360

Collateral financing arrangements
 
$
4,139

 
$

 
$

 
$
3,899

 
$
3,899

Junior subordinated debt securities
 
$
3,194

 
$

 
$
4,029

 
$

 
$
4,029

Other liabilities
 
$
2,249

 
$

 
$
865

 
$
1,385

 
$
2,250

Separate account liabilities
 
$
112,119

 
$

 
$
112,119

 
$

 
$
112,119

 
 
December 31, 2014
 
 
 
 
Fair Value Hierarchy
 
 
 
 
Carrying
Value
 
Level 1
 
Level 2
 
Level 3
 
Total
Estimated
Fair Value
 
 
(In millions)
Assets
 
 
 
 
 
 
 
 
 
 
Mortgage loans
 
$
59,530

 
$

 
$

 
$
62,554

 
$
62,554

Policy loans
 
$
11,618

 
$

 
$
1,647

 
$
12,287

 
$
13,934

Real estate joint ventures
 
$
67

 
$

 
$

 
$
139

 
$
139

Other limited partnership interests
 
$
704

 
$

 
$

 
$
906

 
$
906

Other invested assets
 
$
562

 
$
172

 
$
70

 
$
320

 
$
562

Premiums, reinsurance and other receivables
 
$
3,070

 
$

 
$
713

 
$
2,444

 
$
3,157

Other assets
 
$
251

 
$

 
$
175

 
$
68

 
$
243

Liabilities
 
 
 
 
 
 
 
 
 
 
Policyholder account balances
 
$
134,219

 
$

 
$

 
$
139,359

 
$
139,359

Long-term debt
 
$
16,128

 
$

 
$
18,357

 
$

 
$
18,357

Collateral financing arrangements
 
$
4,196

 
$

 
$

 
$
3,961

 
$
3,961

Junior subordinated debt securities
 
$
3,193

 
$

 
$
4,173

 
$

 
$
4,173

Other liabilities
 
$
2,544

 
$

 
$
1,223

 
$
1,323

 
$
2,546

Separate account liabilities
 
$
116,665

 
$

 
$
116,665

 
$

 
$
116,665