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Separate Accounts, Death Benefits, and Other Insurance Benefits Level 4 (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Movement in Changes in U.S. GMDB/GMWB, International GMDB/GMIB, and UL Secondary Guarantee Benefits [Roll Forward] |  |  |  |  |
Deferred Policy Acquisition Cost, Foreign Currency Translation Adjustment |  | $ 0 |  | $ 0 | $ (86,000,000)
Reinsurance Recoverables on Paid Losses |  | 119,000,000 |  | 133,000,000 |
Minimum Guarantees, Net Amount at Risk [Abstract] |  |  |  |  |
Net Amount at Risk by Product and Guarantee, General Account Value | [1],[2] | 19,981,000,000 |  |  |
Net Amount at Risk by Product and Guarantee, Net Amount at Risk | [2],[3] | 3,567,000,000 |  |  |
Separate Accounts, Liability |  | 120,123,000,000 | [1] | 134,702,000,000 |
Net Amount at Risk by Product and Guarantee, Separate Account Value | [1] | 79,700,000,000 |  |  |
Schedule of Fair Value of Separate Accounts [Abstract] |  |  |  |  |
Schedule of Fair Value of Separate Accounts by Major Category of Investment, Fair Value |  | $ 40,423,000,000 |  | $ 48,852,000,000 |
Invested in Equity Securities |  | 83.00% |  | 83.00% |
Invested in Fixed Income Securities |  | 17.00% |  | 17.00% |
JAPAN |  |  |  |  |
Movement in Changes in U.S. GMDB/GMWB, International GMDB/GMIB, and UL Secondary Guarantee Benefits [Roll Forward] |  |  |  |  |
Liabilities, as of Jan. 1 |  | $ 0 |  | $ 272,000,000 |
Liabilities for Guarantees on Long-Duration Contracts, Incurred Benefits | [4] |  |  | (13,000,000) |
Liabilities for Guarantees on Long-Duration Contracts, Benefits Paid |  |  |  | 15,000,000 |
Liabilities for Guarantees on Long Duration Contracts, Business Disposition Impact |  |  |  | 254,000,000 |
Deferred Policy Acquisition Cost, Foreign Currency Translation Adjustment |  |  |  | 10,000,000 |
Liabilities, as of Dec. 31 |  |  |  | 0 | 272,000,000
Reinsurance Recoverable, as of Jan. 1 |  | 0 |  | 23,000,000 |
Reinsurance Recoverable, as of Dec. 31 |  |  |  | 0 | 23,000,000
Universal Life [Member] |  |  |  |  |
Movement in Changes in U.S. GMDB/GMWB, International GMDB/GMIB, and UL Secondary Guarantee Benefits [Roll Forward] |  |  |  |  |
Liabilities, as of Jan. 1 |  | 2,041,000,000 |  |  |
Liabilities for Guarantees on Long-Duration Contracts, Incurred Benefits |  | (272,000,000) |  |  |
Liabilities, as of Dec. 31 |  | 2,313,000,000 |  | 2,041,000,000 |
Reinsurance Recoverable, as of Jan. 1 |  | 2,041,000,000 |  |  |
Reinsurance Recoverable, as of Dec. 31 |  | 2,313,000,000 |  | 2,041,000,000 |
Reinsurance Recoverable [Member] | JAPAN |  |  |  |  |
Movement in Changes in U.S. GMDB/GMWB, International GMDB/GMIB, and UL Secondary Guarantee Benefits [Roll Forward] |  |  |  |  |
Deferred Policy Acquisition Cost, Foreign Currency Translation Adjustment |  |  |  | 1,000,000 |
Reinsurance Recoverables on Unpaid Losses | [4] |  |  | 7,000,000 |
Reinsurance Recoverables on Paid Losses |  |  |  | 4,000,000 |
reinsurance recoverable asset impact of business disposition |  |  |  | 27,000,000 |
Reinsurance Recoverable [Member] | Universal Life [Member] |  |  |  |  |
Movement in Changes in U.S. GMDB/GMWB, International GMDB/GMIB, and UL Secondary Guarantee Benefits [Roll Forward] |  |  |  |  |
Reinsurance Recoverables on Unpaid Losses | [4] | 272,000,000 |  |  |
Equity Securities [Member] |  |  |  |  |
Schedule of Fair Value of Separate Accounts [Abstract] |  |  |  |  |
Schedule of Fair Value of Separate Accounts by Major Category of Investment, Fair Value |  | 36,970,000,000 |  | 44,786,000,000 |
Cash and Cash Equivalents [Member] |  |  |  |  |
Schedule of Fair Value of Separate Accounts [Abstract] |  |  |  |  |
Schedule of Fair Value of Separate Accounts by Major Category of Investment, Fair Value |  | 3,453,000,000 |  | 4,066,000,000 |
Guaranteed Minimum Withdrawal Benefit [Member] |  |  |  |  |
Minimum Guarantees, Net Amount at Risk [Abstract] |  |  |  |  |
Net Amount at Risk by Product and Guarantee, General Account Value |  | $ 7,000,000,000 |  |  |
Guaranteed Minimum Withdrawal Benefit [Member] | UNITED STATES |  |  |  |  |
Minimum Guarantees, Net Amount at Risk [Abstract] |  |  |  |  |
Net Amount at Risk by Product and Guarantee, Weighted Average Attained Age |  | 71 years |  |  |
With Five Percent Rollup and EPB [Member] |  |  |  |  |
Minimum Guarantees, Net Amount at Risk [Abstract] |  |  |  |  |
Net Amount at Risk by Product and Guarantee, General Account Value | [1],[2] | $ 487,000,000 |  |  |
Net Amount at Risk by Product and Guarantee, Weighted Average Attained Age | [2] | 72 years |  |  |
With Earnings Protection Benefit Rider (EPB) [Member] |  |  |  |  |
Minimum Guarantees, Net Amount at Risk [Abstract] |  |  |  |  |
Net Amount at Risk by Product and Guarantee, General Account Value | [1],[2] | $ 3,697,000,000 |  |  |
Net Amount at Risk by Product and Guarantee, Weighted Average Attained Age | [2] | 69 years |  |  |
With Five Percent Rollup [Member] |  |  |  |  |
Minimum Guarantees, Net Amount at Risk [Abstract] |  |  |  |  |
Net Amount at Risk by Product and Guarantee, General Account Value | [1],[2] | $ 1,257,000,000 |  |  |
Net Amount at Risk by Product and Guarantee, Weighted Average Attained Age | [2] | 71 years |  |  |
Annuitization Benefit [Member] |  |  |  |  |
Minimum Guarantees, Net Amount at Risk [Abstract] |  |  |  |  |
Net Amount at Risk by Product and Guarantee, Net Amount at Risk | [2],[3] | $ 654,000,000 |  |  |
Annuitization Benefit [Member] | UNITED STATES |  |  |  |  |
Minimum Guarantees, Net Amount at Risk [Abstract] |  |  |  |  |
Net Amount at Risk by Product and Guarantee, Net Amount at Risk |  | 0 |  |  |
MAV Only [Member] |  |  |  |  |
Minimum Guarantees, Net Amount at Risk [Abstract] |  |  |  |  |
Net Amount at Risk by Product and Guarantee, General Account Value | [1],[2] | $ 14,540,000,000 |  |  |
Net Amount at Risk by Product and Guarantee, Weighted Average Attained Age | [2] | 70 years |  |  |
Guaranteed Minimum Death Benefit [Member] |  |  |  |  |
Minimum Guarantees, Net Amount at Risk [Abstract] |  |  |  |  |
Net Amount at Risk by Product and Guarantee, General Account Value | [1] | $ 3,822,000,000 |  |  |
Separate Accounts, Liability | [1] | 40,423,000,000 |  |  |
Guaranteed Minimum Death Benefit [Member] | UNITED STATES |  |  |  |  |
Movement in Changes in U.S. GMDB/GMWB, International GMDB/GMIB, and UL Secondary Guarantee Benefits [Roll Forward] |  |  |  |  |
Liabilities, as of Jan. 1 | [5] | 812,000,000 |  | 849,000,000 |
Liabilities for Guarantees on Long-Duration Contracts, Incurred Benefits | [4],[5] | (163,000,000) |  | (73,000,000) |
Liabilities for Guarantees on Long-Duration Contracts, Benefits Paid | [5] | 112,000,000 |  | 110,000,000 |
Liabilities for Guarantees on Long Duration Contracts, Business Disposition Impact | [5] |  |  | 0 |
Liabilities, as of Dec. 31 | [5] | 863,000,000 |  | 812,000,000 | 849,000,000
Reinsurance Recoverable, as of Jan. 1 | [5] | 481,000,000 |  | 533,000,000 |
Reinsurance Recoverables on Unpaid Losses | [4],[5] | 131,000,000 |  |  |
Reinsurance Recoverable, as of Dec. 31 | [5] | 523,000,000 |  | 481,000,000 | 533,000,000
Minimum Guarantees, Net Amount at Risk [Abstract] |  |  |  |  |
Net Amount at Risk by Product and Guarantee, General Account Value | [1],[6] | $ 44,245,000,000 |  |  |
Net Amount at Risk by Product and Guarantee, Weighted Average Attained Age | [6] | 69 years |  |  |
Guaranteed Minimum Death Benefit [Member] | Reinsurance Recoverable [Member] | UNITED STATES |  |  |  |  |
Movement in Changes in U.S. GMDB/GMWB, International GMDB/GMIB, and UL Secondary Guarantee Benefits [Roll Forward] |  |  |  |  |
Reinsurance Recoverables on Unpaid Losses | [4],[5] |  |  | 33,000,000 |
Reinsurance Recoverables on Paid Losses | [5] | $ 89,000,000 |  | 85,000,000 |
reinsurance recoverable asset impact of business disposition | [5] |  |  | 0 |
Reset [Member] |  |  |  |  |
Minimum Guarantees, Net Amount at Risk [Abstract] |  |  |  |  |
Net Amount at Risk by Product and Guarantee, General Account Value | [1],[7] | $ 2,582,000,000 |  |  |
Net Amount at Risk by Product and Guarantee, Weighted Average Attained Age | [7] | 70 years |  |  |
Return of Net Deposit [Member] |  |  |  |  |
Minimum Guarantees, Net Amount at Risk [Abstract] |  |  |  |  |
Net Amount at Risk by Product and Guarantee, General Account Value | [1],[8] | $ 9,459,000,000 |  |  |
Net Amount at Risk by Product and Guarantee, Weighted Average Attained Age | [8] | 68 years |  |  |
Secondary Guarantees [Member] | Universal Life [Member] |  |  |  |  |
Movement in Changes in U.S. GMDB/GMWB, International GMDB/GMIB, and UL Secondary Guarantee Benefits [Roll Forward] |  |  |  |  |
Liabilities, as of Jan. 1 |  | $ 2,041,000,000 |  | 1,802,000,000 |
Liabilities for Guarantees on Long-Duration Contracts, Incurred Benefits | [4] |  |  | (239,000,000) |
Liabilities for Guarantees on Long Duration Contracts, Business Disposition Impact |  |  |  | 0 |
Liabilities, as of Dec. 31 |  |  |  | 2,041,000,000 | 1,802,000,000
Reinsurance Recoverable, as of Jan. 1 |  | 2,041,000,000 |  | 1,802,000,000 |
Reinsurance Recoverable, as of Dec. 31 |  |  |  | 2,041,000,000 | $ 1,802,000,000
Secondary Guarantees [Member] | Reinsurance Recoverable [Member] | Universal Life [Member] |  |  |  |  |
Movement in Changes in U.S. GMDB/GMWB, International GMDB/GMIB, and UL Secondary Guarantee Benefits [Roll Forward] |  |  |  |  |
Reinsurance Recoverables on Unpaid Losses | [4] |  |  | 239,000,000 |
reinsurance recoverable asset impact of business disposition |  |  |  | $ 0 |
Asset Protection Benefit [Member] |  |  |  |  |
Minimum Guarantees, Net Amount at Risk [Abstract] |  |  |  |  |
Net Amount at Risk by Product and Guarantee, General Account Value |  | $ 11,707,000,000 |  |  |
Net Amount at Risk by Product and Guarantee, Weighted Average Attained Age |  | 69 years |  |  |
Lifetime Income Benefit [Member] |  |  |  |  |
Minimum Guarantees, Net Amount at Risk [Abstract] |  |  |  |  |
Net Amount at Risk by Product and Guarantee, General Account Value |  | $ 516,000,000 |  |  |
Net Amount at Risk by Product and Guarantee, Weighted Average Attained Age |  | 69 years |  |  |
Lifetime Income Benefit [Member] |  |  |  |  |
Minimum Guarantees, Net Amount at Risk [Abstract] |  |  |  |  |
Net Amount at Risk by Product and Guarantee, Net Amount at Risk |  | $ 9,000,000 |  |  |
Lifetime Income Benefit [Member] | Annuitization Benefit [Member] |  |  |  |  |
Minimum Guarantees, Net Amount at Risk [Abstract] |  |  |  |  |
Net Amount at Risk by Product and Guarantee, Net Amount at Risk |  | 9,000,000 |  |  |
Asset Protection Benefit [Member] |  |  |  |  |
Minimum Guarantees, Net Amount at Risk [Abstract] |  |  |  |  |
Net Amount at Risk by Product and Guarantee, Net Amount at Risk |  | 519,000,000 |  |  |
Asset Protection Benefit [Member] | Annuitization Benefit [Member] |  |  |  |  |
Minimum Guarantees, Net Amount at Risk [Abstract] |  |  |  |  |
Net Amount at Risk by Product and Guarantee, Net Amount at Risk |  | 346,000,000 |  |  |
Guaranteed Minimum Death Benefit [Member] | UNITED STATES |  |  |  |  |
Minimum Guarantees, Net Amount at Risk [Abstract] |  |  |  |  |
Net Amount at Risk by Product and Guarantee, Net Amount at Risk | [3],[6] | 4,198,000,000 |  |  |
Guaranteed Minimum Death Benefit [Member] | Annuitization Benefit [Member] | UNITED STATES |  |  |  |  |
Minimum Guarantees, Net Amount at Risk [Abstract] |  |  |  |  |
Net Amount at Risk by Product and Guarantee, Net Amount at Risk | [3],[6] | 1,105,000,000 |  |  |
Return of Net Deposit [Member] |  |  |  |  |
Minimum Guarantees, Net Amount at Risk [Abstract] |  |  |  |  |
Net Amount at Risk by Product and Guarantee, Net Amount at Risk | [3],[8] | 71,000,000 |  |  |
Return of Net Deposit [Member] | Annuitization Benefit [Member] |  |  |  |  |
Minimum Guarantees, Net Amount at Risk [Abstract] |  |  |  |  |
Net Amount at Risk by Product and Guarantee, Net Amount at Risk | [3],[8] | 64,000,000 |  |  |
MAV Only [Member] |  |  |  |  |
Minimum Guarantees, Net Amount at Risk [Abstract] |  |  |  |  |
Net Amount at Risk by Product and Guarantee, Net Amount at Risk | [2],[3] | 2,743,000,000 |  |  |
MAV Only [Member] | Annuitization Benefit [Member] |  |  |  |  |
Minimum Guarantees, Net Amount at Risk [Abstract] |  |  |  |  |
Net Amount at Risk by Product and Guarantee, Net Amount at Risk | [2],[3] | 477,000,000 |  |  |
With Five Percent Rollup [Member] |  |  |  |  |
Minimum Guarantees, Net Amount at Risk [Abstract] |  |  |  |  |
Net Amount at Risk by Product and Guarantee, Net Amount at Risk | [2],[3] | 227,000,000 |  |  |
With Five Percent Rollup [Member] | Annuitization Benefit [Member] |  |  |  |  |
Minimum Guarantees, Net Amount at Risk [Abstract] |  |  |  |  |
Net Amount at Risk by Product and Guarantee, Net Amount at Risk | [2],[3] | 77,000,000 |  |  |
Reset [Member] |  |  |  |  |
Minimum Guarantees, Net Amount at Risk [Abstract] |  |  |  |  |
Net Amount at Risk by Product and Guarantee, Net Amount at Risk | [3],[7] | 32,000,000 |  |  |
Reset [Member] | Annuitization Benefit [Member] |  |  |  |  |
Minimum Guarantees, Net Amount at Risk [Abstract] |  |  |  |  |
Net Amount at Risk by Product and Guarantee, Net Amount at Risk | [3],[7] | 32,000,000 |  |  |
With Earnings Protection Benefit Rider (EPB) [Member] |  |  |  |  |
Minimum Guarantees, Net Amount at Risk [Abstract] |  |  |  |  |
Net Amount at Risk by Product and Guarantee, Net Amount at Risk | [2],[3] | 490,000,000 |  |  |
With Earnings Protection Benefit Rider (EPB) [Member] | Annuitization Benefit [Member] |  |  |  |  |
Minimum Guarantees, Net Amount at Risk [Abstract] |  |  |  |  |
Net Amount at Risk by Product and Guarantee, Net Amount at Risk | [2],[3] | 77,000,000 |  |  |
With Five Percent Rollup and EPB [Member] |  |  |  |  |
Minimum Guarantees, Net Amount at Risk [Abstract] |  |  |  |  |
Net Amount at Risk by Product and Guarantee, Net Amount at Risk | [2],[3] | 107,000,000 |  |  |
With Five Percent Rollup and EPB [Member] | Annuitization Benefit [Member] |  |  |  |  |
Minimum Guarantees, Net Amount at Risk [Abstract] |  |  |  |  |
Net Amount at Risk by Product and Guarantee, Net Amount at Risk | [2],[3] | $ 23,000,000 |  |  |
[1] | AV includes the contract holder’s investment in the separate account and the general account.
[2] | MAV GMDB is the greatest of current AV, net premiums paid and the highest AV on any anniversary before age 80 years (adjusted for withdrawals).
[3] | NAR is defined as the guaranteed benefit in excess of the current AV. RNAR represents NAR reduced for reinsurance. NAR and RNAR are highly sensitive to equity markets movements and increase when equity markets decline.
[4] | [2]Includes the portion of assessments established as additions to reserves as well as changes in estimates affecting the reserves.
[5] | [1]These liability balances include all GMDB benefits, plus the life-contingent portion of GMWB benefits in excess of the return of the GRB. GMWB benefits up to the return of the GRB are embedded derivatives held at fair value and are excluded from these balances.
[6] | Some variable annuity contracts with GMDB also have a life-contingent GMWB that may provide for benefits in excess of the return of the GRB. Such contracts included in this amount have $7.0 billion of total account value and weighted average attained age of 71 years. There is no NAR or retained NAR related to these contracts.
[7] | Reset GMDB is the greatest of current AV, net premiums paid and the most recent five to seven year anniversary AV before age 80 years (adjusted for withdrawals).
[8] | ROP GMDB is the greater of current AV or net premiums paid.

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- Definition Amount of increase (decrease) in deferred policy acquisition cost (DAC) due to the effect of foreign currency translation. + References No definition available. + Details
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- Definition Amount of guaranteed minimum benefit payments to policyholders and contract holders, during the period presented, resulting in a decrease to the liability for expected guaranteed minimum benefits in excess of projected account values. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 20 -Section 55 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=6588021&loc=d3e7104-158389 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 80 -Section 50 -Paragraph 1 -Subparagraph (d)(4) -URI http://asc.fasb.org/extlink&oid=6484115&loc=d3e19393-158473 + Details
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- Definition Weighted average attained age of policyholders or contract holders in the specified guarantee type and subset of guarantee class, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 80 -Section 50 -Paragraph 1 -Subparagraph ((d)(5)) -URI http://asc.fasb.org/extlink&oid=6484115&loc=d3e19393-158473 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 20 -Section 55 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=6588021&loc=d3e7104-158389 + Details
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- Definition Sum of the amount of guaranteed minimum benefits the ceding insurer expects to recover on insurance policies ceded to other insurance entities as of the balance sheet date for all guaranteed benefit types. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 80 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6484115&loc=d3e19393-158473 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 20 -Section 55 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=6588021&loc=d3e7104-158389 + Details
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