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Separate Accounts, Death Benefits and Other Insurance Benefit Features Level 4 (Details) - USD ($) | 3 Months Ended | 6 Months Ended |
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Jun. 30, 2017 | Jun. 30, 2017 | Jun. 30, 2016 | Dec. 31, 2016
Movement in Changes in the gross U.S. GMDB, International GMDB/GMIB, and UL Secondary Guarantee Benefits [Roll Forward] |  |  |  |
Liability, balance as of January 1 |  | $ 13,929,000,000 | $ 13,859,000,000 |
Incurred |  | 590,000,000 | 591,000,000 |
Liabilities for Guarantees on Long-Duration Contracts, Benefits Paid |  | (453,000,000) | (464,000,000) |
Liability balance as of September 30 | $ 14,156,000,000 | 14,156,000,000 | 14,446,000,000 |
Reinsurance recoverable asset, as of January 1 |  | 4,451,000,000 | 4,314,000,000 |
Incurred | 220,000,000 | 220,000,000 | 227,000,000 |
Paid | (70,000,000) | (70,000,000) | (84,000,000) |
Reinsurance recoverable asset, as of September 30 | 4,601,000,000 | 4,601,000,000 | 4,457,000,000 |
Minimum Guarantees, Net Amount at Risk [Abstract] |  |  |  |
Net Amount at Risk by Product and Guarantee, General Account Value | 18,736,000,000 | 18,736,000,000 |  |
Net Amount at Risk by Product and Guarantee, Net Amount at Risk | 2,871,000,000 | 2,871,000,000 |  |
Separate Accounts, Liability | 116,746,000,000 | 116,746,000,000 |  | $ 115,665,000,000
Net Amount at Risk by Product and Guarantee, Separate Account Value | 79,764,000,000 | 79,764,000,000 |  |
Separate Accounts by Major Category of Investment [Abstract] |  |  |  |
Schedule of Fair Value of Separate Accounts by Major Category of Investment, Fair Value | $ 36,982,000,000 | $ 36,982,000,000 |  | $ 36,925,000,000
Invested in Fixed Income Securities | 15.00% | 15.00% |  | 16.00%
Invested in Equity Securities | 85.00% | 85.00% |  | 84.00%
Liabilities for Guarantees on Long-Duration Contracts, Other Liability Adjustments |  | $ 90,000,000 | 460,000,000 |
MAV Only [Member] |  |  |  |
Minimum Guarantees, Net Amount at Risk [Abstract] |  |  |  |
Net Amount at Risk by Product and Guarantee, General Account Value | $ 13,641,000,000 | $ 13,641,000,000 |  |
Net Amount at Risk by Product and Guarantee, Weighted Average Attained Age |  | 71 years |  |
With Five Percent Rollup [Member] |  |  |  |
Minimum Guarantees, Net Amount at Risk [Abstract] |  |  |  |
Net Amount at Risk by Product and Guarantee, General Account Value | 1,155,000,000 | $ 1,155,000,000 |  |
Net Amount at Risk by Product and Guarantee, Weighted Average Attained Age |  | 71 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 | 3,465,000,000 | $ 3,465,000,000 |  |
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 | 475,000,000 | $ 475,000,000 |  |
Net Amount at Risk by Product and Guarantee, Weighted Average Attained Age |  | 73 years |  |
Asset Protection Benefit [Member] |  |  |  |
Minimum Guarantees, Net Amount at Risk [Abstract] |  |  |  |
Net Amount at Risk by Product and Guarantee, General Account Value | 10,243,000,000 | $ 10,243,000,000 |  |
Net Amount at Risk by Product and Guarantee, Weighted Average Attained Age |  | 70 years |  |
Lifetime Income Benefit [Member] |  |  |  |
Minimum Guarantees, Net Amount at Risk [Abstract] |  |  |  |
Net Amount at Risk by Product and Guarantee, General Account Value | 459,000,000 | $ 459,000,000 |  |
Net Amount at Risk by Product and Guarantee, Weighted Average Attained Age |  | 70 years |  |
Reset [Member] |  |  |  |
Minimum Guarantees, Net Amount at Risk [Abstract] |  |  |  |
Net Amount at Risk by Product and Guarantee, General Account Value | 2,437,000,000 | $ 2,437,000,000 |  |
Net Amount at Risk by Product and Guarantee, Weighted Average Attained Age |  | 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 | 8,793,000,000 | $ 8,793,000,000 |  |
Net Amount at Risk by Product and Guarantee, Weighted Average Attained Age |  | 71 years |  |
Annuitization Benefit [Member] |  |  |  |
Movement in Changes in the gross U.S. GMDB, International GMDB/GMIB, and UL Secondary Guarantee Benefits [Roll Forward] |  |  |  |
Liability, balance as of January 1 |  | $ 10,516,000,000 | 10,683,000,000 |
Incurred |  | 408,000,000 | 392,000,000 |
Liabilities for Guarantees on Long-Duration Contracts, Benefits Paid |  | (401,000,000) | (398,000,000) |
Liability balance as of September 30 | 10,613,000,000 | 10,613,000,000 | 11,137,000,000 |
Reinsurance recoverable asset, as of January 1 |  | 1,392,000,000 | 1,478,000,000 |
Incurred | 49,000,000 | 49,000,000 | 37,000,000 |
Paid | (27,000,000) | (27,000,000) | (33,000,000) |
Reinsurance recoverable asset, as of September 30 | 1,414,000,000 | 1,414,000,000 | 1,482,000,000 |
Minimum Guarantees, Net Amount at Risk [Abstract] |  |  |  |
Net Amount at Risk by Product and Guarantee, Net Amount at Risk | 467,000,000 | 467,000,000 |  |
Separate Accounts by Major Category of Investment [Abstract] |  |  |  |
Liabilities for Guarantees on Long-Duration Contracts, Other Liability Adjustments |  | 90,000,000 | 460,000,000 |
Guaranteed Minimum Death Benefit [Member] |  |  |  |
Movement in Changes in the gross U.S. GMDB, International GMDB/GMIB, and UL Secondary Guarantee Benefits [Roll Forward] |  |  |  |
Liability, balance as of January 1 |  | 786,000,000 | 863,000,000 |
Incurred |  | 33,000,000 | 41,000,000 |
Liabilities for Guarantees on Long-Duration Contracts, Benefits Paid |  | (52,000,000) | (66,000,000) |
Liability balance as of September 30 | 767,000,000 | 767,000,000 | 838,000,000 |
Reinsurance recoverable asset, as of January 1 |  | 432,000,000 | 523,000,000 |
Incurred | 22,000,000 | 22,000,000 | 32,000,000 |
Paid | (43,000,000) | (43,000,000) | (51,000,000) |
Reinsurance recoverable asset, as of September 30 | 411,000,000 | 411,000,000 | 504,000,000 |
Minimum Guarantees, Net Amount at Risk [Abstract] |  |  |  |
Net Amount at Risk by Product and Guarantee, General Account Value | 3,686,000,000 | $ 3,686,000,000 |  |
Net Amount at Risk by Product and Guarantee, Weighted Average Attained Age |  | 71 years |  |
Separate Accounts, Liability | 36,982,000,000 | $ 36,982,000,000 |  |
Separate Accounts by Major Category of Investment [Abstract] |  |  |  |
Liabilities for Guarantees on Long-Duration Contracts, Other Liability Adjustments |  | 0 | 0 |
Guaranteed Minimum Withdrawal Benefit [Member] |  |  |  |
Minimum Guarantees, Net Amount at Risk [Abstract] |  |  |  |
Net Amount at Risk by Product and Guarantee, General Account Value | 6,300,000,000 | 6,300,000,000 |  |
Net Amount at Risk by Product and Guarantee, Net Amount at Risk | $ 0 | 0 |  |
Net Amount at Risk by Product and Guarantee, Weighted Average Attained Age | 73 years |  |  |
Deferred Annuitization [Member] | Guaranteed Minimum Death Benefit [Member] |  |  |  |
Minimum Guarantees, Net Amount at Risk [Abstract] |  |  |  |
Net Amount at Risk by Product and Guarantee, General Account Value | $ 1,600,000,000 | 1,600,000,000 |  |
Variable Annuity [Member] | Guaranteed Minimum Death Benefit [Member] |  |  |  |
Minimum Guarantees, Net Amount at Risk [Abstract] |  |  |  |
Net Amount at Risk by Product and Guarantee, General Account Value | 40,668,000,000 | 40,668,000,000 |  |
Universal Life [Member] | Secondary Guarantees [Member] |  |  |  |
Movement in Changes in the gross U.S. GMDB, International GMDB/GMIB, and UL Secondary Guarantee Benefits [Roll Forward] |  |  |  |
Liability, balance as of January 1 |  | 2,627,000,000 | 2,313,000,000 |
Incurred |  | 149,000,000 | 158,000,000 |
Liability balance as of September 30 | 2,776,000,000 | 2,776,000,000 | 2,471,000,000 |
Reinsurance recoverable asset, as of January 1 |  | 2,627,000,000 | 2,313,000,000 |
Incurred | 149,000,000 | 149,000,000 | 158,000,000 |
Reinsurance recoverable asset, as of September 30 | 2,776,000,000 | 2,776,000,000 | 2,471,000,000 |
Separate Accounts by Major Category of Investment [Abstract] |  |  |  |
Liabilities for Guarantees on Long-Duration Contracts, Other Liability Adjustments |  | 0 | $ 0 |
MAV Only [Member] |  |  |  |
Minimum Guarantees, Net Amount at Risk [Abstract] |  |  |  |
Net Amount at Risk by Product and Guarantee, Net Amount at Risk | 2,109,000,000 | 2,109,000,000 |  |
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 | 316,000,000 | 316,000,000 |  |
With Five Percent Rollup [Member] |  |  |  |
Minimum Guarantees, Net Amount at Risk [Abstract] |  |  |  |
Net Amount at Risk by Product and Guarantee, Net Amount at Risk | 154,000,000 | 154,000,000 |  |
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 | 49,000,000 | 49,000,000 |  |
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 | 504,000,000 | 504,000,000 |  |
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 | 79,000,000 | 79,000,000 |  |
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 | 104,000,000 | 104,000,000 |  |
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 | 23,000,000 | 23,000,000 |  |
Asset Protection Benefit [Member] |  |  |  |
Minimum Guarantees, Net Amount at Risk [Abstract] |  |  |  |
Net Amount at Risk by Product and Guarantee, Net Amount at Risk | 114,000,000 | 114,000,000 |  |
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 | 76,000,000 | 76,000,000 |  |
Lifetime Income Benefit [Member] |  |  |  |
Minimum Guarantees, Net Amount at Risk [Abstract] |  |  |  |
Net Amount at Risk by Product and Guarantee, Net Amount at Risk | 5,000,000 | 5,000,000 |  |
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 | 5,000,000 | 5,000,000 |  |
Reset [Member] |  |  |  |
Minimum Guarantees, Net Amount at Risk [Abstract] |  |  |  |
Net Amount at Risk by Product and Guarantee, Net Amount at Risk | 7,000,000 | 7,000,000 |  |
Reset [Member] | Annuitization Benefit [Member] |  |  |  |
Minimum Guarantees, Net Amount at Risk [Abstract] |  |  |  |
Net Amount at Risk by Product and Guarantee, Net Amount at Risk | 6,000,000 | 6,000,000 |  |
Return of Net Deposit [Member] |  |  |  |
Minimum Guarantees, Net Amount at Risk [Abstract] |  |  |  |
Net Amount at Risk by Product and Guarantee, Net Amount at Risk | 59,000,000 | 59,000,000 |  |
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 | 56,000,000 | 56,000,000 |  |
Guaranteed Minimum Death Benefit [Member] |  |  |  |
Minimum Guarantees, Net Amount at Risk [Abstract] |  |  |  |
Net Amount at Risk by Product and Guarantee, Net Amount at Risk | 3,056,000,000 | 3,056,000,000 |  |
Guaranteed Minimum Death Benefit [Member] | Annuitization Benefit [Member] |  |  |  |
Minimum Guarantees, Net Amount at Risk [Abstract] |  |  |  |
Net Amount at Risk by Product and Guarantee, Net Amount at Risk | 610,000,000 | 610,000,000 |  |
Equity Securities [Member] |  |  |  |
Separate Accounts by Major Category of Investment [Abstract] |  |  |  |
Schedule of Fair Value of Separate Accounts by Major Category of Investment, Fair Value | 34,135,000,000 | 34,135,000,000 |  | $ 33,880,000,000
Cash and Cash Equivalents [Member] |  |  |  |
Separate Accounts by Major Category of Investment [Abstract] |  |  |  |
Schedule of Fair Value of Separate Accounts by Major Category of Investment, Fair Value | $ 2,847,000,000 | $ 2,847,000,000 |  | $ 3,045,000,000

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- Definition Amount of expected guaranteed benefits in excess of the projected account balances for minimum guaranteed benefit contracts, as of the balance sheet date. + 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)(3) -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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