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Fair Value (Tables)
12 Months Ended
Dec. 31, 2017
Fair Value Disclosures [Abstract]  
Fair Value Inputs, Liabilities, Quantitative Information [Table Text Block]
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, 2017
 
December 31, 2016
 
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
 
Offered quotes (4)
 
93
-
142
 
110
 
18
-
138
 
104
 
Increase
 
Market pricing
 
Quoted prices (4)
 
-
443
 
76
 
13
-
700
 
99
 
Increase
 
Consensus pricing
 
Offered quotes (4)
 

 

 
 
 
37
-
109
 
85
 
Increase
RMBS
Market pricing
 
Quoted prices (4)
 
3
-
107
 
94
 
38
-
111
 
91
 
Increase (5)
ABS
Market pricing
 
Quoted prices (4)
 
100
-
104
 
101
 
94
-
106
 
100
 
Increase (5)
 
Consensus pricing
 
Offered quotes (4)
 
100
-
100
 
100
 
98
-
100
 
99
 
Increase (5)
Derivatives
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Interest rate
Present value techniques
 
Repurchase rates (7)
 
-
 
 
 
(44)
 
18
 
 
 
Decrease (6)
Credit
Present value techniques
 
Credit spreads (8)
 
-
 
 
 
97
-
98
 
 
 
Decrease (6)
 
Consensus pricing
 
Offered quotes (9)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Equity market
Present value techniques or option pricing models
 
Volatility (10)
 
11%
-
31%
 
 
 
14%
-
32%
 
 
 
Increase (6)
 
 
 
 
Correlation (11)
 
10%
-
30%
 
 
 
40%
-
40%
 
 
 
 
Embedded derivatives
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Direct, assumed and ceded guaranteed minimum benefits
Option pricing techniques
 
Mortality rates:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Ages 0 - 40
 
0%
-
0.09%
 
 
 
0%
-
0.09%
 
 
 
Decrease (12)
 
 
 
 
 
Ages 41 - 60
 
0.04%
-
0.65%
 
 
 
0.04%
-
0.65%
 
 
 
Decrease (12)
 
 
 
 
 
Ages 61 - 115
 
0.26%
-
100%
 
 
 
0.26%
-
100%
 
 
 
Decrease (12)
 
 
 
 
Lapse rates:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Durations 1 - 10
 
0.25%
-
100%
 
 
 
0.25%
-
100%
 
 
 
Decrease (13)
 
 
 
 
 
Durations 11 - 20
 
2%
-
100%
 
 
 
2%
-
100%
 
 
 
Decrease (13)
 
 
 
 
 
Durations 21 - 116
 
2%
-
100%
 
 
 
2%
-
100%
 
 
 
Decrease (13)
 
 
 
 
Utilization rates
 
0%
-
25%
 
 
 
0%
-
25%
 
 
 
Increase (14)
 
 
 
 
Withdrawal rates
 
0.25%
-
10%
 
 
 
0.25%
-
10%
 
 
 
(15)
 
 
 
 
Long-term equity volatilities
 
17.40%
-
25%
 
 
 
17.40%
-
25%
 
 
 
Increase (16)
 
 
 
 
Nonperformance risk spread
 
0.64%
-
1.43%
 
 
 
0.04%
-
0.57%
 
 
 
Decrease (17)
______________
(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 estimated fair value. For embedded derivatives, changes to direct and assumed guaranteed minimum benefits are based on liability positions; changes to ceded guaranteed minimum benefits are based on asset 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 accordance with the market convention for fixed maturity securities of dollars per hundred dollars of par.
(5)
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.
(6)
Changes in estimated fair value are based on long U.S. dollar net asset positions and will be inversely impacted for short U.S. dollar net asset positions.
(7)
Ranges represent different repurchase rates utilized as components within the valuation methodology and are presented in basis points.
(8)
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.
(9)
At December 31, 2017 and 2016, independent non-binding broker quotations were used in the determination of 1% and 3% of the total net derivative estimated fair value, respectively.
(10)
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.
(11)
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.
(12)
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.
(13)
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.
(14)
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.
(15)
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.
(16)
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.
(17)
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.
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 at:
 
December 31, 2017
 
Fair Value Hierarchy
 
 
 
Level 1
 
Level 2
 
Level 3
 
Total Estimated
Fair Value
 
(In millions)
Assets
 
 
 
 
 
 
 
Fixed maturity securities:
 
 
 
 
 
 
 
U.S. corporate
$

 
$
21,491

 
$
889

 
$
22,380

U.S. government and agency
8,002

 
7,911

 

 
15,913

RMBS

 
6,836

 
981

 
7,817

Foreign corporate

 
5,723

 
1,048

 
6,771

State and political subdivision

 
4,098

 

 
4,098

CMBS

 
3,155

 
136

 
3,291

ABS

 
1,691

 
105

 
1,796

Foreign government

 
1,262

 
5

 
1,267

Total fixed maturity securities
8,002

 
52,167

 
3,164

 
63,333

Equity securities
18

 
90

 
124

 
232

Short-term investments
135

 
120

 
14

 
269

Commercial mortgage loans held by CSEs — FVO

 
115

 

 
115

Derivative assets: (1)
 
 
 
 
 
 
 
Interest rate
1

 
1,111

 

 
1,112

Foreign currency exchange rate

 
155

 

 
155

Credit

 
30

 
10

 
40

Equity market
15

 
773

 
149

 
937

Total derivative assets
16

 
2,069

 
159

 
2,244

Embedded derivatives within asset host contracts (2)

 

 
227

 
227

Separate account assets
410

 
109,741

 
5

 
110,156

Total assets
$
8,581

 
$
164,302

 
$
3,693

 
$
176,576

Liabilities
 
 
 
 
 
 
 
Derivative liabilities: (1)
 
 
 
 
 
 
 
Interest rate
$

 
$
837

 
$

 
$
837

Foreign currency exchange rate

 
117

 
1

 
118

Credit

 
1

 

 
1

Equity market

 
1,736

 
437

 
2,173

Total derivative liabilities

 
2,691

 
438

 
3,129

Embedded derivatives within liability host contracts (2)

 

 
2,234

 
2,234

Long-term debt of CSEs — FVO

 
11

 

 
11

Total liabilities
$

 
$
2,702

 
$
2,672

 
$
5,374

 
December 31, 2016
 
Fair Value Hierarchy
 
Total Estimated
Fair Value
 
Level 1
 
Level 2
 
Level 3
 
 
(In millions)
Assets
 
 
 
 
 
 
 
Fixed maturity securities:
 
 
 
 
 
 
 
U.S. corporate
$

 
$
20,221

 
$
1,444

 
$
21,665

U.S. government and agency
6,110

 
6,806

 

 
12,916

RMBS

 
6,627

 
1,313

 
7,940

Foreign corporate

 
5,257

 
866

 
6,123

State and political subdivision

 
3,841

 
17

 
3,858

CMBS

 
3,529

 
167

 
3,696

ABS

 
2,383

 
215

 
2,598

Foreign government

 
1,103

 

 
1,103

Total fixed maturity securities
6,110

 
49,767

 
4,022

 
59,899

Equity securities
39

 
124

 
137

 
300

Short-term investments
702

 
568

 
2

 
1,272

Commercial mortgage loans held by CSEs — FVO

 
136

 

 
136

Derivative assets: (1)
 
 
 
 
 
 
 
Interest rate
9

 
2,142

 

 
2,151

Foreign currency exchange rate

 
348

 

 
348

Credit

 
20

 
8

 
28

Equity market
37

 
860

 
179

 
1,076

Total derivative assets
46

 
3,370

 
187

 
3,603

Embedded derivatives within asset host contracts (2)

 

 
409

 
409

Separate account assets
720

 
104,616

 
10

 
105,346

Total assets
$
7,617

 
$
158,581

 
$
4,767

 
$
170,965

Liabilities
 
 
 
 
 
 
 
Derivative liabilities: (1)
 
 
 
 
 
 
 
Interest rate
$

 
$
1,690

 
$
611

 
$
2,301

Foreign currency exchange rate

 
14

 

 
14

Equity market

 
1,038

 
530

 
1,568

Total derivative liabilities

 
2,742

 
1,141

 
3,883

Embedded derivatives within liability host contracts (2)

 

 
3,170

 
3,170

Long-term debt of CSEs — FVO

 
23

 

 
23

Total liabilities
$

 
$
2,765

 
$
4,311

 
$
7,076

______________
(1)
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.
(2)
Embedded derivatives within asset host contracts are presented within premiums, reinsurance and other receivables and other invested assets on the consolidated balance sheets. Embedded derivatives within liability host contracts are presented within policyholder account balances, on the consolidated balance sheets. At December 31, 2017 and 2016, debt and equity securities also included embedded derivatives of ($52) million and ($49) million, respectively.
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, 2017
 
December 31, 2016
 
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
 
Offered quotes (4)
 
93
-
142
 
110
 
18
-
138
 
104
 
Increase
 
Market pricing
 
Quoted prices (4)
 
-
443
 
76
 
13
-
700
 
99
 
Increase
 
Consensus pricing
 
Offered quotes (4)
 

 

 
 
 
37
-
109
 
85
 
Increase
RMBS
Market pricing
 
Quoted prices (4)
 
3
-
107
 
94
 
38
-
111
 
91
 
Increase (5)
ABS
Market pricing
 
Quoted prices (4)
 
100
-
104
 
101
 
94
-
106
 
100
 
Increase (5)
 
Consensus pricing
 
Offered quotes (4)
 
100
-
100
 
100
 
98
-
100
 
99
 
Increase (5)
Derivatives
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Interest rate
Present value techniques
 
Repurchase rates (7)
 
-
 
 
 
(44)
 
18
 
 
 
Decrease (6)
Credit
Present value techniques
 
Credit spreads (8)
 
-
 
 
 
97
-
98
 
 
 
Decrease (6)
 
Consensus pricing
 
Offered quotes (9)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Equity market
Present value techniques or option pricing models
 
Volatility (10)
 
11%
-
31%
 
 
 
14%
-
32%
 
 
 
Increase (6)
 
 
 
 
Correlation (11)
 
10%
-
30%
 
 
 
40%
-
40%
 
 
 
 
Embedded derivatives
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Direct, assumed and ceded guaranteed minimum benefits
Option pricing techniques
 
Mortality rates:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Ages 0 - 40
 
0%
-
0.09%
 
 
 
0%
-
0.09%
 
 
 
Decrease (12)
 
 
 
 
 
Ages 41 - 60
 
0.04%
-
0.65%
 
 
 
0.04%
-
0.65%
 
 
 
Decrease (12)
 
 
 
 
 
Ages 61 - 115
 
0.26%
-
100%
 
 
 
0.26%
-
100%
 
 
 
Decrease (12)
 
 
 
 
Lapse rates:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Durations 1 - 10
 
0.25%
-
100%
 
 
 
0.25%
-
100%
 
 
 
Decrease (13)
 
 
 
 
 
Durations 11 - 20
 
2%
-
100%
 
 
 
2%
-
100%
 
 
 
Decrease (13)
 
 
 
 
 
Durations 21 - 116
 
2%
-
100%
 
 
 
2%
-
100%
 
 
 
Decrease (13)
 
 
 
 
Utilization rates
 
0%
-
25%
 
 
 
0%
-
25%
 
 
 
Increase (14)
 
 
 
 
Withdrawal rates
 
0.25%
-
10%
 
 
 
0.25%
-
10%
 
 
 
(15)
 
 
 
 
Long-term equity volatilities
 
17.40%
-
25%
 
 
 
17.40%
-
25%
 
 
 
Increase (16)
 
 
 
 
Nonperformance risk spread
 
0.64%
-
1.43%
 
 
 
0.04%
-
0.57%
 
 
 
Decrease (17)
______________
(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 estimated fair value. For embedded derivatives, changes to direct and assumed guaranteed minimum benefits are based on liability positions; changes to ceded guaranteed minimum benefits are based on asset 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 accordance with the market convention for fixed maturity securities of dollars per hundred dollars of par.
(5)
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.
(6)
Changes in estimated fair value are based on long U.S. dollar net asset positions and will be inversely impacted for short U.S. dollar net asset positions.
(7)
Ranges represent different repurchase rates utilized as components within the valuation methodology and are presented in basis points.
(8)
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.
(9)
At December 31, 2017 and 2016, independent non-binding broker quotations were used in the determination of 1% and 3% of the total net derivative estimated fair value, respectively.
(10)
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.
(11)
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.
(12)
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.
(13)
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.
(14)
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.
(15)
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.
(16)
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.
(17)
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)
 
Structured Securities
 
State and
Political
Subdivision
 
Foreign
Government
 
Equity
Securities
 
Short Term
Investments
 
Net
Derivatives (2)
 
Net Embedded
Derivatives (3)
 
Separate
Account
Assets (4)
 
(In millions)
Balance, January 1, 2016
$
2,410

 
$
1,996

 
$
13

 
$
27

 
$
97

 
$
47

 
$
(232
)
 
$
(442
)
 
$
146

Total realized/unrealized gains (losses) included in net income (loss) (5) (6)
(11
)
 
30

 

 

 

 

 
(703
)
 
(1,760
)
 

Total realized/unrealized gains (losses) included in AOCI
(24
)
 
21

 

 

 
(11
)
 

 
4

 

 

Purchases (7)
584

 
600

 

 

 

 
3

 
10

 

 
2

Sales (7)
(443
)
 
(598
)
 

 

 
(26
)
 
(1
)
 

 

 
(134
)
Issuances (7)

 

 

 

 

 

 

 

 

Settlements (7)

 

 

 

 

 

 
(33
)
 
(559
)
 

Transfers into Level 3 (8)
119

 
12

 
9

 

 
131

 

 

 

 

Transfers out of Level 3 (8)
(325
)
 
(366
)
 
(5
)
 
(27
)
 
(54
)
 
(47
)
 

 

 
(4
)
Balance, December 31, 2016
$
2,310

 
$
1,695

 
$
17

 
$

 
$
137

 
$
2

 
$
(954
)
 
$
(2,761
)
 
$
10

Total realized/unrealized gains (losses) included in net income (loss) (5) (6)
(3
)
 
28

 

 

 
(3
)
 

 
92

 
1,233

 

Total realized/unrealized gains (losses) included in AOCI
127

 
52

 

 

 

 

 

 

 

Purchases (7)
442

 
106

 

 
5

 
3

 
14

 
4

 

 
2

Sales (7)
(222
)
 
(526
)
 

 

 
(13
)
 
(1
)
 

 

 
(4
)
Issuances (7)

 

 

 

 

 

 

 

 

Settlements (7)

 

 

 

 

 

 
579

 
(479
)
 
(1
)
Transfers into Level 3 (8)
178

 
11

 

 

 

 

 

 

 
2

Transfers out of Level 3 (8)
(895
)
 
(144
)
 
(17
)
 

 

 
(1
)
 

 

 
(4
)
Balance, December 31, 2017
$
1,937

 
$
1,222

 
$

 
$
5

 
$
124

 
$
14

 
$
(279
)
 
$
(2,007
)
 
$
5

Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at December 31, 2015 (9)
$
11

 
$
21

 
$

 
$

 
$

 
$

 
$
(64
)
 
$
(310
)
 
$

Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at December 31, 2016 (9)
$
2

 
$
28

 
$

 
$

 
$

 
$

 
$
(687
)
 
$
(1,772
)
 
$

Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at December 31, 2017 (9)
$
1

 
$
23

 
$

 
$

 
$

 
$

 
$
(52
)
 
$
1,300

 
$

Gains (Losses) Data for the year ended December 31, 2015
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Total realized/unrealized gains (losses) included in net income (loss) (5) (6)
$
16

 
$
21

 
$

 
$

 
$
11

 
$

 
$
(74
)
 
$
(303
)
 
$
(6
)
Total realized/unrealized gains (losses) included in AOCI
$
(120
)
 
$
(14
)
 
$

 
$
(2
)
 
$
(10
)
 
$

 
$
2

 
$

 
$

____________
(1)
Comprised of U.S. and foreign corporate securities.
(2)
Freestanding derivative assets and liabilities are presented net for purposes of the rollforward.
(3)
Embedded derivative assets and liabilities are presented net for purposes of the rollforward.
(4)
Investment performance related to separate account assets is fully offset by corresponding amounts credited to contract holders within separate account liabilities. Therefore, such changes in estimated fair value are not recorded in net income (loss). For the purpose of this disclosure, these changes are presented within net investment gains (losses).
(5)
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). Lapses associated with net embedded derivatives are included in net derivative gains (losses). Substantially all realized/unrealized gains (losses) included in net income (loss) for net derivatives and net embedded derivatives are reported in net derivatives gains (losses).
(6)
Interest and dividend accruals, as well as cash interest coupons and dividends received, are excluded from the rollforward.
(7)
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.
(8)
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.
(9)
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).
Fair Value Option
The following table presents information for certain assets and liabilities of CSEs, which are accounted for under the FVO. These assets and liabilities were initially measured at fair value. 
 
 
December 31,
 
 
2017
 
2016
 
 
(In millions)
Assets (1)
 
Unpaid principal balance
 
$
70

 
$
88

Difference between estimated fair value and unpaid principal balance
 
45

 
48

Carrying value at estimated fair value
 
$
115

 
$
136

Liabilities (1)
 
 
 
 
Contractual principal balance
 
$
10

 
$
22

Difference between estimated fair value and contractual principal balance
 
1

 
1

Carrying value at estimated fair value
 
$
11

 
$
23

______________
(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.
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, 2017
 
 
 
Fair Value Hierarchy
 
 
 
Carrying
Value
 
Level 1
 
Level 2
 
Level 3
 
Total
Estimated
Fair Value
 
(In millions)
Assets
 
 
 
 
 
 
 
 
 
Mortgage loans
$
10,525


$


$


$
10,768


$
10,768

Policy loans
$
1,106

 
$

 
$
746

 
$
439

 
$
1,185

Real estate joint ventures
$
5

 
$

 
$

 
$
22

 
$
22

Other limited partnership interests
$
36

 
$

 
$

 
$
28

 
$
28

Loans to MetLife, Inc.
$

 
$

 
$

 
$

 
$

Premiums, reinsurance and other receivables
$
1,556

 
$

 
$
126

 
$
1,783

 
$
1,909

Liabilities
 
 
 
 
 
 
 
 
 
Policyholder account balances
$
15,626

 
$

 
$

 
$
15,760

 
$
15,760

Long-term debt
$
35

 
$

 
$
42

 
$

 
$
42

Other liabilities
$
459

 
$

 
$
93

 
$
368

 
$
461

Separate account liabilities
$
1,206

 
$

 
$
1,206

 
$

 
$
1,206

 
December 31, 2016
 

 
Fair Value Hierarchy
 

 
Carrying
Value
 
Level 1
 
Level 2
 
Level 3
 
Total
Estimated
Fair Value

(In millions)
Assets
 
 
 
 
 
 
 
 
 
Mortgage loans
$
9,154

 
$

 
$

 
$
9,298

 
$
9,298

Policy loans
$
1,093

 
$

 
$
746

 
$
431

 
$
1,177

Real estate joint ventures
$
12

 
$

 
$

 
$
44

 
$
44

Other limited partnership interests
$
44

 
$

 
$

 
$
42

 
$
42

Loans to MetLife, Inc.
$
1,100

 
$

 
$
1,090

 
$

 
$
1,090

Premiums, reinsurance and other receivables
$
2,363

 
$

 
$
834

 
$
1,981

 
$
2,815

Liabilities
 
 
 
 
 
 
 
 
 
Policyholder account balances
$
16,043

 
$

 
$

 
$
17,259

 
$
17,259

Long-term debt
$
1,881

 
$

 
$
2,117

 
$

 
$
2,117

Other liabilities
$
256

 
$

 
$
90

 
$
166

 
$
256

Separate account liabilities
$
1,110

 
$

 
$
1,110

 
$

 
$
1,110