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Investment Holding Level 4 Net Realized Capital Gains (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2016 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Gain (Loss) on Investments [Line Items] |  |  |  |
HFPI estimated tax benefit on disposition | $ 0 |  |  |
Gain (Loss) on Investments, Excluding Other than Temporary Impairments |  | $ (212) | $ (54) | $ 75
Available-for-sale Securities, Gross Realized Gains |  | 441 | 460 | 527
Available-for-sale Securities, Gross Realized Losses |  | 253 | 405 | 250
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net |  | 56 | 102 | 59
Foreign Currency Transaction Gain (Loss), before Tax |  | (148) | (4) | 124
Unrealized Gain (Loss) on Foreign Currency Derivatives, Net, before Tax |  | 140 | (3) | (142)
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal |  | (650) |  |
Realized Investment Gains (Losses) |  | (268) | (156) | 16
Mortgages [Member] |  |  |  |
Gain (Loss) on Investments [Line Items] |  |  |  |
Valuation Allowances and Reserves, Additions for Adjustments |  | 0 | 5 | 4
Macro Hedge Program [Member] |  |  |  |
Gain (Loss) on Investments [Line Items] |  |  |  |
Derivative, Gain (Loss) on Derivative, Net |  | (163) | (46) | (11)
GMWB Derivatives, Net [Member] |  |  |  |
Gain (Loss) on Investments [Line Items] |  |  |  |
Derivative, Gain (Loss) on Derivative, Net |  | (38) | (87) | 5
Other Investments [Member] |  |  |  |
Gain (Loss) on Investments [Line Items] |  |  |  |
Realized Investment Gains (Losses) |  | (191) | 36 | (174)
Variable Annuity [Member] |  |  |  |
Gain (Loss) on Investments [Line Items] |  |  |  |
Derivative, Gain (Loss) on Derivative, Net |  | (201) | (133) | (6)
Not Designated as Hedging Instrument [Member] |  |  |  |
Gain (Loss) on Investments [Line Items] |  |  |  |
Derivative, Gain (Loss) on Derivative, Net |  | (64) | (104) | (353)
Not Designated as Hedging Instrument [Member] | Fixed Annuity Hedging Instruments [Member] |  |  |  |
Gain (Loss) on Investments [Line Items] |  |  |  |
Derivative, Gain (Loss) on Derivative, Net |  | 25 | (21) | (148)
Fair Value Hedging [Member] | Not Designated as Hedging Instrument [Member] |  |  |  |
Gain (Loss) on Investments [Line Items] |  |  |  |
Derivative, Gain (Loss) on Derivative, Net |  | (201) | (133) | (6)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Unrealized Investment Gain (Loss) [Member] |  |  |  |
Gain (Loss) on Investments [Line Items] |  |  |  |
Gain (Loss) on Investments, Excluding Other than Temporary Impairments |  | $ 132 | $ (32) | $ 217

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- Definition The net realized gains or losses on investments during the period, not including gains or losses on securities separately or otherwise categorized as trading, available-for-sale, or held-to-maturity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.3(a)) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 325 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6485959&loc=d3e22529-158502 + Details
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- Definition Amount of net unrealized gain (loss) related to the change in fair value of foreign currency exchange rate derivatives designated as cash flow hedging instruments. Recorded in accumulated other comprehensive income to the extent that the cash flow hedge is determined to be effective. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624171-113959 + Details
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