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Investment Holding Level 3 (Tables) | 6 Months Ended
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Jun. 30, 2017
Schedule of Investments [Abstract] |
Mortgage Loans on Real Estate, by Loan Disclosure [Text Block] | Mortgage Loans Mortgage Loan Valuation Allowances Commercial mortgage loans are considered to be impaired when management estimates that, based upon current information and events, it is probable that the Company will be unable to collect amounts due according to the contractual terms of the loan agreement. The Company reviews mortgage loans on a quarterly basis to identify potential credit losses. Among other factors, management reviews current and projected macroeconomic trends, such as unemployment rates and property-specific factors such as rental rates, occupancy levels, LTV ratios and debt service coverage ratios (“DSCR”). In addition, the Company considers historical, current and projected delinquency rates and property values. Estimates of collectibility require the use of significant management judgment and include the probability and timing of borrower default and loss severity estimates. In addition, cash flow projections may change based upon new information about the borrower's ability to pay and/or the value of underlying collateral such as changes in projected property value estimates. For mortgage loans that are deemed impaired, a valuation allowance is established for the difference between the carrying amount and estimated fair value. The mortgage loan's estimated fair value is most frequently the Company's share of the fair value of the collateral but may also be the Company’s share of either (a) the present value of the expected future cash flows discounted at the loan’s effective interest rate or (b) the loan’s observable market price. A valuation allowance may be recorded for an individual loan or for a group of loans that have an LTV ratio of 90% or greater, a low DSCR or have other lower credit quality characteristics. Changes in valuation allowances are recorded in net realized capital gains and losses. Interest income on impaired loans is accrued to the extent it is deemed collectible and the borrowers continue to make payments under the original or restructured loan terms. The Company stops accruing interest income on loans when it is probable that the Company will not receive interest and principal payments according to the contractual terms of the loan agreement. The Company resumes accruing interest income when it determines that sufficient collateral exists to satisfy the full amount of the loan principal and interest payments and when it is probable cash will be received in the foreseeable future. Interest income on defaulted loans is recognized when received.
Realized Gain (Loss) on Investments [Table Text Block] |
Net Realized Capital Gains (Losses)
| Three Months Ended June 30, | Six Months Ended June 30,
(Before tax) | 2017 | 2016 | 2017 | 2016
Gross gains on sales | $ | 140 |  | $ | 124 |  | $ | 252 |  | $ | 214 |
Gross losses on sales | (31 | ) | (25 | ) | (106 | ) | (133 | )
Net OTTI losses recognized in earnings | (14 | ) | (7 | ) | (15 | ) | (30 | )
Valuation allowances on mortgage loans | 2 |  | — |  | 2 |  | — |
Results of variable annuity hedge program |  |  |  |  |
GMWB derivatives, net | 20 |  | 3 |  | 38 |  | (14 | )
Macro hedge program | (38 | ) | (20 | ) | (124 | ) | (34 | )
Total results of variable annuity hedge program | (18 | ) | (17 | ) | (86 | ) | (48 | )
Transactional foreign currency revaluation | 13 |  | (87 | ) | — |  | (131 | )
Non-qualifying foreign currency derivatives | (17 | ) | 82 |  | (6 | ) | 121 |
Other, net [1] | — |  | (17 | ) | 14 |  | (95 | )
Net realized capital gains (losses) | $ | 75 |  | $ | 53 |  | $ | 55 |  | $ | (102 | )
[1] | Includes non-qualifying derivatives, excluding variable annuity hedge program and foreign currency derivatives, of $(5) and $(23), respectively for the three months ended June 30, 2017 and 2016. For the six months ended June 30, 2017 and 2016, the non-qualifying derivatives, excluding variable annuity hedge program and foreign currency derivatives were $5 and $(60), respectively.
Net realized capital gains and losses from investment sales are reported as a component of revenues and are determined on a specific identification basis. Before tax, net gains (and losses) on sales and impairments previously reported as unrealized gains (or losses) in AOCI were $95 and $131 for the three and six months ended June 30, 2017, and $92 and $51 for the three and six months ended June 30, 2016. Proceeds from sales of AFS securities totaled $6.3 billion and $13.0 billion for the three and six months ended June 30, 2017, and $4.1 billion and $9.0 billion for the three and six months ended June 30, 2016.
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Table Text Block] |
Impairments in Earnings by Type
| Three Months Ended June 30, | Six Months Ended June 30,
| 2017 | 2016 | 2017 | 2016
Credit impairments | $ | 13 |  | $ | 5 |  | $ | 14 |  | $ | 23 |
Intent-to-sell impairments | — |  | 1 |  | — |  | 3 |
Impairments on equity securities | 1 |  | 1 |  | 1 |  | 4 |
Total impairments | $ | 14 |  | $ | 7 |  | $ | 15 |  | $ | 30 |
Cumulative Credit Impairments
| Three Months Ended June 30, | Six Months Ended June 30,
(Before tax) | 2017 | 2016 | 2017 | 2016
Balance as of beginning of period | $ | (260 | ) | $ | (336 | ) | $ | (280 | ) | $ | (324 | )
Additions for credit impairments recognized on [1]: |  |  |  |
Securities not previously impaired | — |  | (4 | ) | (1 | ) | (21 | )
Securities previously impaired | (13 | ) | (1 | ) | (13 | ) | (2 | )
Reductions for credit impairments previously recognized on: |  |  |  |
Securities that matured or were sold during the period | 29 |  | 35 |  | 41 |  | 36 |
Securities due to an increase in expected cash flows | 8 |  | 13 |  | 17 |  | 18 |
Balance as of end of period | $ | (236 | ) | $ | (293 | ) | $ | (236 | ) | $ | (293 | )
[1] | These additions are included in the net OTTI losses recognized in earnings in the Condensed Consolidated Statements of Operations.
Schedule of Available-for-sale Securities Reconciliation [Table Text Block] | Available-for-Sale Securities
AFS Securities by Type
| June 30, 2017 | December 31, 2016
| Cost or Amortized Cost | Gross Unrealized Gains | Gross Unrealized Losses | Fair Value | Non-Credit OTTI [1] | Cost or Amortized Cost | Gross Unrealized Gains | Gross Unrealized Losses | Fair Value | Non-Credit OTTI [1]
ABS | $ | 2,350 |  | $ | 21 |  | $ | (17 | ) | $ | 2,354 |  | $ | — |  | $ | 2,396 |  | $ | 17 |  | $ | (31 | ) | $ | 2,382 |  | $ | — |
CDOs | 2,427 |  | 33 |  | (3 | ) | 2,457 |  | — |  | 1,853 |  | 67 |  | (4 | ) | 1,916 |  | — |
CMBS | 5,085 |  | 127 |  | (39 | ) | 5,173 |  | (7 | ) | 4,907 |  | 97 |  | (68 | ) | 4,936 |  | (6 | )
Corporate | 24,307 |  | 1,842 |  | (105 | ) | 26,044 |  | — |  | 24,380 |  | 1,510 |  | (224 | ) | 25,666 |  | — |
Foreign govt./govt. agencies | 1,249 |  | 56 |  | (8 | ) | 1,297 |  | — |  | 1,164 |  | 33 |  | (26 | ) | 1,171 |  | — |
Municipal | 11,461 |  | 852 |  | (29 | ) | 12,284 |  | — |  | 10,825 |  | 732 |  | (71 | ) | 11,486 |  | — |
RMBS | 4,131 |  | 95 |  | (7 | ) | 4,219 |  | — |  | 4,738 |  | 66 |  | (37 | ) | 4,767 |  | — |
U.S. Treasuries | 3,790 |  | 235 |  | (19 | ) | 4,006 |  | — |  | 3,542 |  | 182 |  | (45 | ) | 3,679 |  | — |
Total fixed maturities, AFS | $ | 54,800 |  | $ | 3,261 |  | $ | (227 | ) | $ | 57,834 |  | $ | (7 | ) | $ | 53,805 |  | $ | 2,704 |  | $ | (506 | ) | $ | 56,003 |  | $ | (6 | )
Equity securities, AFS | 964 |  | 111 |  | (20 | ) | 1,055 |  | — |  | 1,020 |  | 96 |  | (19 | ) | 1,097 |  | — |
Total AFS securities | $ | 55,764 |  | $ | 3,372 |  | $ | (247 | ) | $ | 58,889 |  | $ | (7 | ) | $ | 54,825 |  | $ | 2,800 |  | $ | (525 | ) | $ | 57,100 |  | $ | (6 | )
[1] | Represents the amount of cumulative non-credit OTTI losses recognized in OCI on securities that also had credit impairments. These losses are included in gross unrealized losses as of June 30, 2017, and December 31, 2016.
Fixed maturities, AFS, by Contractual Maturity Year
| June 30, 2017 | December 31, 2016
| Amortized Cost | Fair Value | Amortized Cost | Fair Value
One year or less | $ | 2,113 |  | $ | 2,132 |  | $ | 1,896 |  | $ | 1,912 |
Over one year through five years | 8,954 |  | 9,224 |  | 9,015 |  | 9,289 |
Over five years through ten years | 9,282 |  | 9,627 |  | 9,038 |  | 9,245 |
Over ten years | 20,458 |  | 22,648 |  | 19,962 |  | 21,556 |
Subtotal | 40,807 |  | 43,631 |  | 39,911 |  | 42,002 |
Mortgage-backed and asset-backed securities | 13,993 |  | 14,203 |  | 13,894 |  | 14,001 |
Total fixed maturities, AFS | $ | 54,800 |  | $ | 57,834 |  | $ | 53,805 |  | $ | 56,003 |
Investments Classified by Contractual Maturity Date [Table Text Block] |
Fixed maturities, AFS, by Contractual Maturity Year
| June 30, 2017 | December 31, 2016
| Amortized Cost | Fair Value | Amortized Cost | Fair Value
One year or less | $ | 2,113 |  | $ | 2,132 |  | $ | 1,896 |  | $ | 1,912 |
Over one year through five years | 8,954 |  | 9,224 |  | 9,015 |  | 9,289 |
Over five years through ten years | 9,282 |  | 9,627 |  | 9,038 |  | 9,245 |
Over ten years | 20,458 |  | 22,648 |  | 19,962 |  | 21,556 |
Subtotal | 40,807 |  | 43,631 |  | 39,911 |  | 42,002 |
Mortgage-backed and asset-backed securities | 13,993 |  | 14,203 |  | 13,894 |  | 14,001 |
Total fixed maturities, AFS | $ | 54,800 |  | $ | 57,834 |  | $ | 53,805 |  | $ | 56,003 |
Estimated maturities may differ from contractual maturities due to security call or prepayment provisions. Due to the potential for variability in payment speeds (i.e. prepayments or extensions), mortgage-backed and asset-backed securities are not categorized by contractual maturity.
Schedule of Unrealized Loss on Investments [Table Text Block] |
Unrealized Loss Aging for AFS Securities by Type and Length of Time as of June 30, 2017
| Less Than 12 Months | 12 Months or More | Total
| Amortized Cost | Fair Value | Unrealized Losses | Amortized Cost | Fair Value | Unrealized Losses | Amortized Cost | Fair Value | Unrealized Losses
ABS | $ | 637 |  | $ | 636 |  | $ | (1 | ) | $ | 229 |  | $ | 213 |  | $ | (16 | ) | $ | 866 |  | $ | 849 |  | $ | (17 | )
CDOs | 1,432 |  | 1,430 |  | (2 | ) | 184 |  | 183 |  | (1 | ) | 1,616 |  | 1,613 |  | (3 | )
CMBS | 1,438 |  | 1,412 |  | (26 | ) | 157 |  | 144 |  | (13 | ) | 1,595 |  | 1,556 |  | (39 | )
Corporate | 3,442 |  | 3,381 |  | (61 | ) | 1,085 |  | 1,041 |  | (44 | ) | 4,527 |  | 4,422 |  | (105 | )
Foreign govt./govt. agencies | 270 |  | 266 |  | (4 | ) | 53 |  | 49 |  | (4 | ) | 323 |  | 315 |  | (8 | )
Municipal | 960 |  | 932 |  | (28 | ) | 8 |  | 7 |  | (1 | ) | 968 |  | 939 |  | (29 | )
RMBS | 635 |  | 630 |  | (5 | ) | 156 |  | 154 |  | (2 | ) | 791 |  | 784 |  | (7 | )
U.S. Treasuries | 1,744 |  | 1,725 |  | (19 | ) | — |  | — |  | — |  | 1,744 |  | 1,725 |  | (19 | )
Total fixed maturities, AFS | $ | 10,558 |  | $ | 10,412 |  | $ | (146 | ) | $ | 1,872 |  | $ | 1,791 |  | $ | (81 | ) | $ | 12,430 |  | $ | 12,203 |  | $ | (227 | )
Equity securities, AFS | 190 |  | 173 |  | (17 | ) | 25 |  | 22 |  | (3 | ) | 215 |  | 195 |  | (20 | )
Total securities in an unrealized loss position | $ | 10,748 |  | $ | 10,585 |  | $ | (163 | ) | $ | 1,897 |  | $ | 1,813 |  | $ | (84 | ) | $ | 12,645 |  | $ | 12,398 |  | $ | (247 | )
Unrealized Loss Aging for AFS Securities by Type and Length of Time as of December 31, 2016
| Less Than 12 Months | 12 Months or More | Total
| Amortized Cost | Fair Value | Unrealized Losses | Amortized Cost | Fair Value | Unrealized Losses | Amortized Cost | Fair Value | Unrealized Losses
ABS | $ | 582 |  | $ | 579 |  | $ | (3 | ) | $ | 368 |  | $ | 340 |  | $ | (28 | ) | $ | 950 |  | $ | 919 |  | $ | (31 | )
CDOs | 641 |  | 640 |  | (1 | ) | 370 |  | 367 |  | (3 | ) | 1,011 |  | 1,007 |  | (4 | )
CMBS | 2,076 |  | 2,027 |  | (49 | ) | 293 |  | 274 |  | (19 | ) | 2,369 |  | 2,301 |  | (68 | )
Corporate | 5,418 |  | 5,248 |  | (170 | ) | 835 |  | 781 |  | (54 | ) | 6,253 |  | 6,029 |  | (224 | )
Foreign govt./govt. agencies | 573 |  | 550 |  | (23 | ) | 27 |  | 24 |  | (3 | ) | 600 |  | 574 |  | (26 | )
Municipal | 1,567 |  | 1,498 |  | (69 | ) | 43 |  | 41 |  | (2 | ) | 1,610 |  | 1,539 |  | (71 | )
RMBS | 1,655 |  | 1,624 |  | (31 | ) | 591 |  | 585 |  | (6 | ) | 2,246 |  | 2,209 |  | (37 | )
U.S. Treasuries | 1,432 |  | 1,387 |  | (45 | ) | — |  | — |  | — |  | 1,432 |  | 1,387 |  | (45 | )
Total fixed maturities, AFS | $ | 13,944 |  | $ | 13,553 |  | $ | (391 | ) | $ | 2,527 |  | $ | 2,412 |  | $ | (115 | ) | $ | 16,471 |  | $ | 15,965 |  | $ | (506 | )
Equity securities, AFS | 330 |  | 315 |  | (15 | ) | 38 |  | 34 |  | (4 | ) | 368 |  | 349 |  | (19 | )
Total securities in an unrealized loss position | $ | 14,274 |  | $ | 13,868 |  | $ | (406 | ) | $ | 2,565 |  | $ | 2,446 |  | $ | (119 | ) | $ | 16,839 |  | $ | 16,314 |  | $ | (525 | )
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] |
Mortgage Loans by Property Type
| June 30, 2017 | December 31, 2016
| Carrying Value | Percent of Total | Carrying Value | Percent of Total
Commercial |  |  |  |
Agricultural | $ | 4 |  | 0.1 | % | $ | 16 |  | 0.3 | %
Industrial | 1,439 |  | 24.8 | % | 1,468 |  | 25.7 | %
Lodging | 25 |  | 0.4 | % | 25 |  | 0.4 | %
Multifamily | 1,504 |  | 25.9 | % | 1,365 |  | 24.0 | %
Office | 1,389 |  | 24.0 | % | 1,361 |  | 23.9 | %
Retail | 1,000 |  | 17.3 | % | 1,036 |  | 18.2 | %
Other | 435 |  | 7.5 | % | 426 |  | 7.5 | %
Total mortgage loans | $ | 5,796 |  | 100.0 | % | $ | 5,697 |  | 100.0 | %
Commercial Mortgage Loans Credit Quality
| June 30, 2017 | December 31, 2016
Loan-to-value | Carrying Value | Avg. Debt-Service Coverage Ratio | Carrying Value | Avg. Debt-Service Coverage Ratio
Greater than 80% | $ | 5 |  | 1.36x | $ | 20 |  | 0.59x
65% - 80% | 416 |  | 2.23x | 568 |  | 2.17x
Less than 65% | 5,375 |  | 2.73x | 5,109 |  | 2.78x
Total commercial mortgage loans | $ | 5,796 |  | 2.69x | $ | 5,697 |  | 2.70x
The following table presents the activity within the Company’s valuation allowance for mortgage loans. These loans have been evaluated both individually and collectively for impairment. Loans evaluated collectively for impairment are immaterial.
Valuation Allowance Activity
| 2017 | 2016
Balance, as of January 1 | $ | (19 | ) | $ | (23 | )
(Additions)/Reversals | (1 | ) | — |
Deductions | 19 |  | 4 |
Balance, as of June 30 | $ | (1 | ) | $ | (19 | )
Mortgage Loans by Region
| June 30, 2017 | December 31, 2016
| Carrying Value | Percent of Total | Carrying Value | Percent of Total
East North Central | $ | 293 |  | 5.1 | % | $ | 293 |  | 5.1 | %
East South Central | 14 |  | 0.2 | % | 14 |  | 0.2 | %
Middle Atlantic | 544 |  | 9.4 | % | 534 |  | 9.4 | %
Mountain | 76 |  | 1.3 | % | 61 |  | 1.1 | %
New England | 388 |  | 6.7 | % | 345 |  | 6.1 | %
Pacific | 1,671 |  | 28.8 | % | 1,609 |  | 28.3 | %
South Atlantic | 1,265 |  | 21.8 | % | 1,198 |  | 21.0 | %
West North Central | 40 |  | 0.7 | % | 40 |  | 0.7 | %
West South Central | 347 |  | 6.0 | % | 338 |  | 5.9 | %
Other [1] | 1,158 |  | 20.0 | % | 1,265 |  | 22.2 | %
Total mortgage loans | $ | 5,796 |  | 100.0 | % | $ | 5,697 |  | 100.0 | %
[1] | Primarily represents loans collateralized by multiple properties in various regions.
Consolidation, Variable Interest Entity, Policy [Policy Text Block] | Variable Interest Entities The Company is engaged with various special purpose entities and other entities that are deemed to be VIEs primarily as an investor through normal investment activities but also as an investment manager and previously as a means of accessing capital through a contingent capital facility ("facility"). A VIE is an entity that either has investors that lack certain essential characteristics of a controlling financial interest, such as simple majority kick-out rights, or lacks sufficient funds to finance its own activities without financial support provided by other entities. The Company performs ongoing qualitative assessments of its VIEs to determine whether the Company has a controlling financial interest in the VIE and therefore is the primary beneficiary. The Company is deemed to have a controlling financial interest when it has both the ability to direct the activities that most significantly impact the economic performance of the VIE and the obligation to absorb losses or right to receive benefits from the VIE that could potentially be significant to the VIE. Based on the Company’s assessment, if it determines it is the primary beneficiary, the Company consolidates the VIE in the Company’s Condensed Consolidated Financial Statements.
Schedule of Variable Interest Entities [Table Text Block] | Consolidated VIEs As of June 30, 2017, the Company did not hold any securities for which it is the primary beneficiary. As of December 31, 2016, the Company held one CDO for which it was the primary beneficiary. The CDO represented a structured investment vehicle for which the Company had a controlling financial interest. As of December 31, 2016 the Company held total CDO assets of $5 included in cash with an associated liability of $5 included in other liabilities on the Company's Condensed Consolidated Balance Sheets. The Company did not have any additional exposure to loss associated with this investment.
Schedule of Participating Mortgage Loans [Table Text Block] |
Valuation Allowance Activity
| 2017 | 2016
Balance, as of January 1 | $ | (19 | ) | $ | (23 | )
(Additions)/Reversals | (1 | ) | — |
Deductions | 19 |  | 4 |
Balance, as of June 30 | $ | (1 | ) | $ | (19 | )

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- Definition Tabular disclosure of the significant judgments and assumptions made in determining whether a variable interest (as defined) held by the entity requires the variable interest entity (VIE) (as defined) to be consolidated and (or) disclose information about its involvement with the VIE, individually or in aggregate (as applicable); the nature of restrictions, if any, on the consolidated VIE's assets and on the settlement of its liabilities reported by an entity in its statement of financial position, including the carrying amounts of such assets and liabilities; the nature of, and changes in, the risks associated with involvement in the VIE; how involvement with the VIE affects the entity's financial position, financial performance, and cash flows; the lack of recourse if creditors (or beneficial interest holders) of the consolidated VIE have no recourse to the general credit of the primary beneficiary (if applicable); the terms of arrangements, giving consideration to both explicit arrangements and implicit variable interests, if any, that could require the entity to provide financial support to the VIE, including events or circumstances that could expose the entity to a loss; the methodology used by the entity for determining whether or not it is the primary beneficiary of the variable interest entity; the significant factors considered and judgments made in determining that the power to direct the activities of a VIE that most significantly impact the VIE's economic performance are shared (as defined); the carrying amounts and classification of assets and liabilities of the VIE included in the statement of financial position; the entity's maximum exposure to loss, if any, as a result of its involvement with the VIE, including how the maximum exposure is determined and significant sources of the entity's exposure to the VIE; a comparison of the carrying amounts of the assets and liabilities and the entity's maximum exposure to loss; information about any liquidity arrangements, guarantees, and (or) other commitments by third parties that may affect the fair value or risk of the entity's variable interest in the VIE; whether or not the entity has provided financial support or other support (explicitly or implicitly) to the VIE that it was not previously contractually required to provide or whether the entity intends to provide that support, including the type and amount of the support and the primary reasons for providing the support; and supplemental information the entity determines necessary to provide. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=64801991&loc=d3e5747-111685 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=64801991&loc=SL6228884-111685 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=64801991&loc=d3e5728-111685 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Variable Interest Entity -URI http://asc.fasb.org/extlink&oid=6528138 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 5A -URI http://asc.fasb.org/extlink&oid=64801991&loc=SL6759159-111685 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=64801991&loc=d3e5710-111685 + Details
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