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Investments and Derivative Instruments Level 4 Net Realized Capital Gains (Losses) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015 | Dec. 31, 2015
Net Realized Capital Gains (Losses) [Line Items] |  |  |  |  |  |  |  |
Foreign Currency Transaction Gain (Loss), Realized |  | $ (87) |  | $ 16 |  | $ (131) | $ 16 |
Available-for-sale Securities, Gross Realized Gains | [1] | 124 |  | 121 |  | 214 | 318 |
Derivative, Notional Amount |  | 59,225 |  |  |  | 59,225 |  | $ 62,185
Derivative, Fair Value, Net |  | (984) |  |  |  | (984) |  | (926)
Gain (Loss) on Investments [Abstract] |  |  |  |  |  |  |  |
Available-for-sale Securities, Gross Realized Losses |  | 25 |  | 112 |  | 133 | 260 |
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net |  | 7 |  | 11 |  | 30 | 23 |
Periodic Net Coupon Settlements on Credit Derivatives |  | 0 |  | 4 |  | 0 | 5 |
Derivative, Gain (Loss) on Derivative, Net |  | (17) |  | (27) |  | (48) | (30) |
Total Realized Investment Gains (Losses) |  | 53 |  | 9 |  | (102) | 14 |
Gain (Loss) on Investments, Excluding Other than Temporary Impairments |  | 60 |  | 20 |  | (72) | 37 |
Proceeds from Sale of Available-for-sale Securities |  | 4,100 |  | 5,600 |  | 9,000 | 11,800 |
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |  |  |  |  |  |  |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Amortized Cost |  | 4,998 |  |  |  | 4,998 |  | 19,095
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value |  | 4,892 |  |  |  | 4,892 |  | 18,569
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss |  | 107 |  |  |  | 107 |  | 526
Available-for-sale Securities Continuous Unrealized Loss Position Twelve Months or Longer Amortized Cost |  | 4,040 |  |  |  | 4,040 |  | 3,072
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value |  | 3,862 |  |  |  | 3,862 |  | 2,896
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss |  | 178 |  |  |  | 178 |  | 173
Available-for-sale Securities Continuous Unrealized Loss Position Amortized Cost |  | 9,038 |  |  |  | 9,038 |  | 22,167
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value |  | 8,754 |  |  |  | 8,754 |  | 21,465
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss |  | 285 |  |  |  | 285 |  | 699
Derivative Asset, Fair Value, Gross Asset |  | 1,394 |  |  |  | 1,394 |  | 933
Derivative Liability, Fair Value, Gross Liability |  | 2,077 |  |  |  | 2,077 |  | 1,730
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement |  | 1,533 |  |  |  | 1,533 |  | 1,095
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement |  | 2,517 |  |  |  | 2,517 |  | 2,021
GMWB Hedging Instruments [Member] | UNITED STATES |  |  |  |  |  |  |  |
Net Realized Capital Gains (Losses) [Line Items] |  |  |  |  |  |  |  |
Derivative, Notional Amount |  | 10,532 |  |  |  | 10,532 |  | 10,979
Derivative, Fair Value, Net |  | 203 |  |  |  | 203 |  | 158
Mortgages [Member] |  |  |  |  |  |  |  |
Gain (Loss) on Investments [Abstract] |  |  |  |  |  |  |  |
Valuation Allowances and Reserves, Adjustments |  | 0 |  | 0 |  | 0 | 3 |
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Investment Gain (Loss) Attributable to Parent [Member] |  |  |  |  |  |  |  |
Gain (Loss) on Investments [Abstract] |  |  |  |  |  |  |  |
Gain (Loss) on Investments, Excluding Other than Temporary Impairments |  | 92 |  | 6 |  | 51 | 43 |
Collateralized Debt Obligations [Member] |  |  |  |  |  |  |  |
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |  |  |  |  |  |  |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Amortized Cost | [2] | 1,006 |  |  |  | 1,006 |  | 1,164
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | [2] | 997 |  |  |  | 997 |  | 1,154
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | [2] | 10 |  |  |  | 10 |  | 10
Available-for-sale Securities Continuous Unrealized Loss Position Twelve Months or Longer Amortized Cost | [2] | 1,262 |  |  |  | 1,262 |  | 1,243
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | [2] | 1,246 |  |  |  | 1,246 |  | 1,227
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | [2] | 16 |  |  |  | 16 |  | 13
Available-for-sale Securities Continuous Unrealized Loss Position Amortized Cost | [2] | 2,268 |  |  |  | 2,268 |  | 2,407
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | [2] | 2,243 |  |  |  | 2,243 |  | 2,381
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | [2] | 26 |  |  |  | 26 |  | 23
Asset-backed Securities [Member] |  |  |  |  |  |  |  |
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |  |  |  |  |  |  |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Amortized Cost |  | 758 |  |  |  | 758 |  | 1,619
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value |  | 755 |  |  |  | 755 |  | 1,609
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss |  | 3 |  |  |  | 3 |  | 10
Available-for-sale Securities Continuous Unrealized Loss Position Twelve Months or Longer Amortized Cost |  | 427 |  |  |  | 427 |  | 357
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value |  | 389 |  |  |  | 389 |  | 322
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss |  | 38 |  |  |  | 38 |  | 35
Available-for-sale Securities Continuous Unrealized Loss Position Amortized Cost |  | 1,185 |  |  |  | 1,185 |  | 1,976
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value |  | 1,144 |  |  |  | 1,144 |  | 1,931
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss |  | 41 |  |  |  | 41 |  | 45
Commercial Mortgage Backed Securities [Member] |  |  |  |  |  |  |  |
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |  |  |  |  |  |  |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Amortized Cost |  | 548 |  |  |  | 548 |  | 1,726
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value |  | 536 |  |  |  | 536 |  | 1,681
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss |  | 12 |  |  |  | 12 |  | 45
Available-for-sale Securities Continuous Unrealized Loss Position Twelve Months or Longer Amortized Cost |  | 413 |  |  |  | 413 |  | 189
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value |  | 393 |  |  |  | 393 |  | 178
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss |  | 20 |  |  |  | 20 |  | 11
Available-for-sale Securities Continuous Unrealized Loss Position Amortized Cost |  | 961 |  |  |  | 961 |  | 1,915
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value |  | 929 |  |  |  | 929 |  | 1,859
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss |  | 32 |  |  |  | 32 |  | 56
Corporate Debt Securities [Member] |  |  |  |  |  |  |  |
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |  |  |  |  |  |  |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Amortized Cost |  | 1,742 |  |  |  | 1,742 |  | 9,206
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value |  | 1,685 |  |  |  | 1,685 |  | 8,866
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss |  | 57 |  |  |  | 57 |  | 340
Available-for-sale Securities Continuous Unrealized Loss Position Twelve Months or Longer Amortized Cost |  | 1,008 |  |  |  | 1,008 |  | 656
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value |  | 932 |  |  |  | 932 |  | 580
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss |  | 76 |  |  |  | 76 |  | 76
Available-for-sale Securities Continuous Unrealized Loss Position Amortized Cost |  | 2,750 |  |  |  | 2,750 |  | 9,862
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value |  | 2,617 |  |  |  | 2,617 |  | 9,446
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss |  | 133 |  |  |  | 133 |  | 416
Foreign Government Debt Securities [Member] |  |  |  |  |  |  |  |
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |  |  |  |  |  |  |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Amortized Cost |  | 57 |  |  |  | 57 |  | 679
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value |  | 55 |  |  |  | 55 |  | 646
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss |  | 2 |  |  |  | 2 |  | 33
Available-for-sale Securities Continuous Unrealized Loss Position Twelve Months or Longer Amortized Cost |  | 129 |  |  |  | 129 |  | 124
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value |  | 125 |  |  |  | 125 |  | 110
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss |  | 4 |  |  |  | 4 |  | 14
Available-for-sale Securities Continuous Unrealized Loss Position Amortized Cost |  | 186 |  |  |  | 186 |  | 803
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value |  | 180 |  |  |  | 180 |  | 756
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss |  | 6 |  |  |  | 6 |  | 47
Municipal Bonds [Member] |  |  |  |  |  |  |  |
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |  |  |  |  |  |  |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Amortized Cost |  | 97 |  |  |  | 97 |  | 440
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value |  | 95 |  |  |  | 95 |  | 430
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss |  | 2 |  |  |  | 2 |  | 10
Available-for-sale Securities Continuous Unrealized Loss Position Twelve Months or Longer Amortized Cost |  | 21 |  |  |  | 21 |  | 18
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value |  | 20 |  |  |  | 20 |  | 17
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss |  | 1 |  |  |  | 1 |  | 1
Available-for-sale Securities Continuous Unrealized Loss Position Amortized Cost |  | 118 |  |  |  | 118 |  | 458
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value |  | 115 |  |  |  | 115 |  | 447
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss |  | 3 |  |  |  | 3 |  | 11
Residential Mortgage Backed Securities [Member] |  |  |  |  |  |  |  |
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |  |  |  |  |  |  |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Amortized Cost |  | 587 |  |  |  | 587 |  | 1,349
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value |  | 583 |  |  |  | 583 |  | 1,340
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss |  | 4 |  |  |  | 4 |  | 9
Available-for-sale Securities Continuous Unrealized Loss Position Twelve Months or Longer Amortized Cost |  | 709 |  |  |  | 709 |  | 415
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value |  | 693 |  |  |  | 693 |  | 402
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss |  | 16 |  |  |  | 16 |  | 13
Available-for-sale Securities Continuous Unrealized Loss Position Amortized Cost |  | 1,296 |  |  |  | 1,296 |  | 1,764
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value |  | 1,276 |  |  |  | 1,276 |  | 1,742
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss |  | 20 |  |  |  | 20 |  | 22
US Treasury Securities [Member] |  |  |  |  |  |  |  |
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |  |  |  |  |  |  |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Amortized Cost |  | 2 |  |  |  | 2 |  | 2,432
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value |  | 2 |  |  |  | 2 |  | 2,394
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss |  | 0 |  |  |  | 0 |  | 38
Available-for-sale Securities Continuous Unrealized Loss Position Twelve Months or Longer Amortized Cost |  | 0 |  |  |  | 0 |  | 8
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value |  | 0 |  |  |  | 0 |  | 8
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss |  | 0 |  |  |  | 0 |  | 0
Available-for-sale Securities Continuous Unrealized Loss Position Amortized Cost |  | 2 |  |  |  | 2 |  | 2,440
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value |  | 2 |  |  |  | 2 |  | 2,402
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss |  | 0 |  |  |  | 0 |  | 38
Debt Securities [Member] |  |  |  |  |  |  |  |
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |  |  |  |  |  |  |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Amortized Cost |  | 4,797 |  |  |  | 4,797 |  | 18,615
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value |  | 4,708 |  |  |  | 4,708 |  | 18,120
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss |  | 90 |  |  |  | 90 |  | 495
Available-for-sale Securities Continuous Unrealized Loss Position Twelve Months or Longer Amortized Cost |  | 3,969 |  |  |  | 3,969 |  | 3,010
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value |  | 3,798 |  |  |  | 3,798 |  | 2,844
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss |  | 171 |  |  |  | 171 |  | 163
Available-for-sale Securities Continuous Unrealized Loss Position Amortized Cost |  | 8,766 |  |  |  | 8,766 |  | 21,625
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value |  | 8,506 |  |  |  | 8,506 |  | 20,964
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss |  | 261 |  |  |  | 261 |  | 658
Equity Securities [Member] |  |  |  |  |  |  |  |
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |  |  |  |  |  |  |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Amortized Cost | [3] | 201 |  |  |  | 201 |  | 480
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | [3] | 184 |  |  |  | 184 |  | 449
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | [3] | 17 |  |  |  | 17 |  | 31
Available-for-sale Securities Continuous Unrealized Loss Position Twelve Months or Longer Amortized Cost | [3] | 71 |  |  |  | 71 |  | 62
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | [3] | 64 |  |  |  | 64 |  | 52
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | [3] | 7 |  |  |  | 7 |  | 10
Available-for-sale Securities Continuous Unrealized Loss Position Amortized Cost | [3] | 272 |  |  |  | 272 |  | 542
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | [3] | 248 |  |  |  | 248 |  | 501
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | [3] | 24 |  |  |  | 24 |  | 41
Other Investments [Member] |  |  |  |  |  |  |  |
Gain (Loss) on Investments [Abstract] |  |  |  |  |  |  |  |
Total Realized Investment Gains (Losses) | [1] | (22) |  | 34 |  | (105) | 7 |
Other Equity Securities [Member] |  |  |  |  |  |  |  |
Gain (Loss) on Investments [Abstract] |  |  |  |  |  |  |  |
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net |  | 0 |  | 2 |  | 0 | 2 |
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] |  |  |  |  |  |  |  |
Net Realized Capital Gains (Losses) [Line Items] |  |  |  |  |  |  |  |
Derivative, Notional Amount |  | 3,576 |  |  |  | 3,576 |  | 3,670
Derivative, Fair Value, Net |  | 96 |  |  |  | 96 |  | (2)
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |  |  |  |  |  |  |  |
Derivative Asset, Fair Value, Gross Asset |  | 124 |  |  |  | 124 |  | 57
Derivative Liability, Fair Value, Gross Liability |  | 28 |  |  |  | 28 |  | 59
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Interest Rate Contract [Member] |  |  |  |  |  |  |  |
Net Realized Capital Gains (Losses) [Line Items] |  |  |  |  |  |  |  |
Derivative, Notional Amount |  | 3,433 |  |  |  | 3,433 |  | 3,527
Derivative, Fair Value, Net |  | 115 |  |  |  | 115 |  | 17
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |  |  |  |  |  |  |  |
Derivative Asset, Fair Value, Gross Asset |  | 115 |  |  |  | 115 |  | 50
Derivative Liability, Fair Value, Gross Liability |  | 0 |  |  |  | 0 |  | 33
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Foreign Exchange Contract [Member] |  |  |  |  |  |  |  |
Net Realized Capital Gains (Losses) [Line Items] |  |  |  |  |  |  |  |
Derivative, Notional Amount |  | 143 |  |  |  | 143 |  | 143
Derivative, Fair Value, Net |  | (19) |  |  |  | (19) |  | (19)
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |  |  |  |  |  |  |  |
Derivative Asset, Fair Value, Gross Asset |  | 9 |  |  |  | 9 |  | 7
Derivative Liability, Fair Value, Gross Liability |  | 28 |  |  |  | 28 |  | 26
Designated as Hedging Instrument [Member] | Fair Value Hedging [Member] |  |  |  |  |  |  |  |
Net Realized Capital Gains (Losses) [Line Items] |  |  |  |  |  |  |  |
Derivative, Notional Amount |  | 23 |  |  |  | 23 |  | 23
Derivative, Fair Value, Net |  | 0 |  |  |  | 0 |  | 0
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |  |  |  |  |  |  |  |
Derivative Asset, Fair Value, Gross Asset |  | 0 |  |  |  | 0 |  | 0
Derivative Liability, Fair Value, Gross Liability |  | 0 |  |  |  | 0 |  | 0
Designated as Hedging Instrument [Member] | Fair Value Hedging [Member] | Interest Rate Contract [Member] |  |  |  |  |  |  |  |
Net Realized Capital Gains (Losses) [Line Items] |  |  |  |  |  |  |  |
Derivative, Notional Amount |  | 23 |  |  |  | 23 |  | 23
Derivative, Fair Value, Net |  | 0 |  |  |  | 0 |  | 0
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |  |  |  |  |  |  |  |
Derivative Asset, Fair Value, Gross Asset |  | 0 |  |  |  | 0 |  | 0
Derivative Liability, Fair Value, Gross Liability |  | 0 |  |  |  | 0 |  | 0
Not Designated as Hedging Instrument [Member] |  |  |  |  |  |  |  |
Net Realized Capital Gains (Losses) [Line Items] |  |  |  |  |  |  |  |
Derivative, Notional Amount |  | 55,626 |  |  |  | 55,626 |  | 58,492
Derivative, Fair Value, Net |  | (1,080) |  |  |  | (1,080) |  | (924)
Gain (Loss) on Investments [Abstract] |  |  |  |  |  |  |  |
Derivative, Gain (Loss) on Derivative, Net |  | 42 | [4] | (11) | [4] | 13 | (46) |
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |  |  |  |  |  |  |  |
Derivative Asset, Fair Value, Gross Asset |  | 1,409 |  |  |  | 1,409 |  | 1,038
Derivative Liability, Fair Value, Gross Liability |  | 2,489 |  |  |  | 2,489 |  | 1,962
Not Designated as Hedging Instrument [Member] | UNITED KINGDOM |  |  |  |  |  |  |  |
Gain (Loss) on Investments [Abstract] |  |  |  |  |  |  |  |
Derivative, Gain (Loss) on Derivative, Net |  | 79 |  | (17) |  | 121 | (31) |
Not Designated as Hedging Instrument [Member] | GMWB Hedging Instruments [Member] | UNITED STATES |  |  |  |  |  |  |  |
Net Realized Capital Gains (Losses) [Line Items] |  |  |  |  |  |  |  |
Derivative, Notional Amount |  | 10,532 |  |  |  | 10,532 |  | 10,979
Derivative, Fair Value, Net |  | 203 |  |  |  | 203 |  | 158
Gain (Loss) on Investments [Abstract] |  |  |  |  |  |  |  |
Derivative, Gain (Loss) on Derivative, Net |  | 32 |  | (66) |  | 82 | (53) |
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |  |  |  |  |  |  |  |
Derivative Asset, Fair Value, Gross Asset |  | 360 |  |  |  | 360 |  | 264
Derivative Liability, Fair Value, Gross Liability |  | 157 |  |  |  | 157 |  | 106
Not Designated as Hedging Instrument [Member] | Interest Rate Contract [Member] |  |  |  |  |  |  |  |
Gain (Loss) on Investments [Abstract] |  |  |  |  |  |  |  |
Derivative, Gain (Loss) on Derivative, Net |  | 4 |  | 7 |  | (20) | (5) |
Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] |  |  |  |  |  |  |  |
Gain (Loss) on Investments [Abstract] |  |  |  |  |  |  |  |
Derivative, Gain (Loss) on Derivative, Net |  | 22 |  | 1 |  | 25 | 8 |
Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] | UNITED KINGDOM |  |  |  |  |  |  |  |
Gain (Loss) on Investments [Abstract] |  |  |  |  |  |  |  |
Derivative, Gain (Loss) on Derivative, Net |  | 0 |  |  |  |  |  |
Not Designated as Hedging Instrument [Member] | Macro Hedge Program [Member] | UNITED STATES |  |  |  |  |  |  |  |
Net Realized Capital Gains (Losses) [Line Items] |  |  |  |  |  |  |  |
Derivative, Notional Amount |  | 4,699 |  |  |  | 4,699 |  | 4,548
Derivative, Fair Value, Net |  | 147 |  |  |  | 147 |  | 147
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |  |  |  |  |  |  |  |
Derivative Asset, Fair Value, Gross Asset |  | 185 |  |  |  | 185 |  | 179
Derivative Liability, Fair Value, Gross Liability |  | 38 |  |  |  | 38 |  | 32
Coinsurance and Modified Coinsurance Reinsurance Contracts [Member] | Not Designated as Hedging Instrument [Member] |  |  |  |  |  |  |  |
Net Realized Capital Gains (Losses) [Line Items] |  |  |  |  |  |  |  |
Derivative, Notional Amount |  | 928 |  |  |  | 928 |  | 895
Derivative, Fair Value, Net |  | 32 |  |  |  | 32 |  | 79
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |  |  |  |  |  |  |  |
Derivative Asset, Fair Value, Gross Asset |  | 32 |  |  |  | 32 |  | 79
Derivative Liability, Fair Value, Gross Liability |  | 0 |  |  |  | 0 |  | 0
Put Option [Member] | Not Designated as Hedging Instrument [Member] |  |  |  |  |  |  |  |
Net Realized Capital Gains (Losses) [Line Items] |  |  |  |  |  |  |  |
Derivative, Notional Amount |  | 500 |  |  |  | 500 |  | 500
Derivative, Fair Value, Net |  | 4 |  |  |  | 4 |  | 7
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |  |  |  |  |  |  |  |
Derivative Asset, Fair Value, Gross Asset |  | 4 |  |  |  | 4 |  | 7
Derivative Liability, Fair Value, Gross Liability |  | 0 |  |  |  | 0 |  | 0
GMWB Reinsurance [Member] | Not Designated as Hedging Instrument [Member] | UNITED STATES |  |  |  |  |  |  |  |
Net Realized Capital Gains (Losses) [Line Items] |  |  |  |  |  |  |  |
Derivative, Notional Amount |  | 2,905 |  |  |  | 2,905 |  | 3,106
Derivative, Fair Value, Net |  | 106 |  |  |  | 106 |  | 83
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |  |  |  |  |  |  |  |
Derivative Asset, Fair Value, Gross Asset |  | 106 |  |  |  | 106 |  | 83
Derivative Liability, Fair Value, Gross Liability |  | 0 |  |  |  | 0 |  | 0
GMWB Product Derivatives [Member] | Not Designated as Hedging Instrument [Member] | UNITED STATES |  |  |  |  |  |  |  |
Net Realized Capital Gains (Losses) [Line Items] |  |  |  |  |  |  |  |
Derivative, Notional Amount | [5] | 14,072 |  |  |  | 14,072 |  | 15,099
Derivative, Fair Value, Net | [5] | (412) |  |  |  | (412) |  | (262)
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |  |  |  |  |  |  |  |
Derivative Asset, Fair Value, Gross Asset | [5] | 0 |  |  |  | 0 |  | 0
Derivative Liability, Fair Value, Gross Liability | [5] | 412 |  |  |  | 412 |  | 262
Equity Contract [Member] | GMWB Hedging Instruments [Member] | UNITED STATES |  |  |  |  |  |  |  |
Net Realized Capital Gains (Losses) [Line Items] |  |  |  |  |  |  |  |
Derivative, Notional Amount |  | 1,395 |  |  |  | 1,395 |  | 1,362
Derivative, Fair Value, Net |  | 0 |  |  |  | 0 |  | 2
Equity Contract [Member] | Not Designated as Hedging Instrument [Member] |  |  |  |  |  |  |  |
Net Realized Capital Gains (Losses) [Line Items] |  |  |  |  |  |  |  |
Derivative, Notional Amount |  | 1,441 |  |  |  | 1,441 |  | 419
Derivative, Fair Value, Net |  | 1 |  |  |  | 1 |  | 15
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |  |  |  |  |  |  |  |
Derivative Asset, Fair Value, Gross Asset |  | 30 |  |  |  | 30 |  | 41
Derivative Liability, Fair Value, Gross Liability |  | 29 |  |  |  | 29 |  | 26
Credit Derivatives in Offsetting Positions [Member] | Not Designated as Hedging Instrument [Member] |  |  |  |  |  |  |  |
Net Realized Capital Gains (Losses) [Line Items] |  |  |  |  |  |  |  |
Derivative, Notional Amount |  | 3,905 |  |  |  | 3,905 |  | 4,059
Derivative, Fair Value, Net |  | (2) |  |  |  | (2) |  | (2)
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |  |  |  |  |  |  |  |
Derivative Asset, Fair Value, Gross Asset |  | 46 |  |  |  | 46 |  | 40
Derivative Liability, Fair Value, Gross Liability |  | 48 |  |  |  | 48 |  | 42
Credit Default Swap, Selling Protection [Member] | Not Designated as Hedging Instrument [Member] |  |  |  |  |  |  |  |
Net Realized Capital Gains (Losses) [Line Items] |  |  |  |  |  |  |  |
Derivative, Notional Amount | [6] | 1,842 |  |  |  | 1,842 |  | 2,458
Derivative, Fair Value, Net | [6] | 0 |  |  |  | 0 |  | (13)
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |  |  |  |  |  |  |  |
Derivative Asset, Fair Value, Gross Asset | [6] | 13 |  |  |  | 13 |  | 9
Derivative Liability, Fair Value, Gross Liability | [6] | 13 |  |  |  | 13 |  | 22
Credit Default Swap, Buying Protection [Member] | Not Designated as Hedging Instrument [Member] |  |  |  |  |  |  |  |
Net Realized Capital Gains (Losses) [Line Items] |  |  |  |  |  |  |  |
Derivative, Notional Amount |  | 227 |  |  |  | 227 |  | 423
Derivative, Fair Value, Net |  | (5) |  |  |  | (5) |  | 18
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |  |  |  |  |  |  |  |
Derivative Asset, Fair Value, Gross Asset |  | 1 |  |  |  | 1 |  | 22
Derivative Liability, Fair Value, Gross Liability |  | 6 |  |  |  | 6 |  | 4
Foreign Exchange Contract [Member] | Not Designated as Hedging Instrument [Member] |  |  |  |  |  |  |  |
Net Realized Capital Gains (Losses) [Line Items] |  |  |  |  |  |  |  |
Derivative, Notional Amount |  | 356 |  |  |  | 356 |  | 653
Derivative, Fair Value, Net |  | 26 |  |  |  | 26 |  | 17
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |  |  |  |  |  |  |  |
Derivative Asset, Fair Value, Gross Asset |  | 26 |  |  |  | 26 |  | 17
Derivative Liability, Fair Value, Gross Liability |  | 0 |  |  |  | 0 |  | 0
Interest Rate Contract [Member] | GMWB Hedging Instruments [Member] | UNITED STATES |  |  |  |  |  |  |  |
Net Realized Capital Gains (Losses) [Line Items] |  |  |  |  |  |  |  |
Derivative, Notional Amount |  | 3,716 |  |  |  | 3,716 |  | 3,740
Derivative, Fair Value, Net |  | 37 |  |  |  | 37 |  | 25
Interest Rate Contract [Member] | Not Designated as Hedging Instrument [Member] |  |  |  |  |  |  |  |
Net Realized Capital Gains (Losses) [Line Items] |  |  |  |  |  |  |  |
Derivative, Notional Amount |  | 13,156 |  |  |  | 13,156 |  | 14,290
Derivative, Fair Value, Net |  | (919) |  |  |  | (919) |  | (814)
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |  |  |  |  |  |  |  |
Derivative Asset, Fair Value, Gross Asset |  | 606 |  |  |  | 606 |  | 297
Derivative Liability, Fair Value, Gross Liability |  | 1,525 |  |  |  | 1,525 |  | 1,111
Macro Hedge Program [Member] | UNITED STATES |  |  |  |  |  |  |  |
Net Realized Capital Gains (Losses) [Line Items] |  |  |  |  |  |  |  |
Derivative, Notional Amount |  | 4,699 |  |  |  | 4,699 |  | 4,548
Derivative, Fair Value, Net |  | 147 |  |  |  | 147 |  | 147
Macro Hedge Program [Member] | Not Designated as Hedging Instrument [Member] | UNITED STATES |  |  |  |  |  |  |  |
Gain (Loss) on Investments [Abstract] |  |  |  |  |  |  |  |
Derivative, Gain (Loss) on Derivative, Net |  | (20) |  | $ (23) |  | (34) | $ (27) |
Other Liabilities [Member] |  |  |  |  |  |  |  |
Net Realized Capital Gains (Losses) [Line Items] |  |  |  |  |  |  |  |
Derivative, Notional Amount |  | 32,001 |  |  |  | 32,001 |  | 19,358
Derivative, Fair Value, Net |  | (992) |  |  |  | (992) |  | (798)
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |  |  |  |  |  |  |  |
Derivative Asset, Fair Value, Gross Asset |  | 1,030 |  |  |  | 1,030 |  | 524
Derivative Liability, Fair Value, Gross Liability |  | 2,022 |  |  |  | 2,022 |  | 1,322
Fixed Maturities [Member] |  |  |  |  |  |  |  |
Net Realized Capital Gains (Losses) [Line Items] |  |  |  |  |  |  |  |
Derivative, Notional Amount |  | 388 |  |  |  | 388 |  | 425
Derivative, Fair Value, Net |  | 1 |  |  |  | 1 |  | (3)
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |  |  |  |  |  |  |  |
Derivative Asset, Fair Value, Gross Asset |  | 1 |  |  |  | 1 |  | 0
Derivative Liability, Fair Value, Gross Liability |  | 0 |  |  |  | 0 |  | 3
Other Investments [Member] |  |  |  |  |  |  |  |
Net Realized Capital Gains (Losses) [Line Items] |  |  |  |  |  |  |  |
Derivative, Notional Amount |  | 8,882 |  |  |  | 8,882 |  | 23,253
Derivative, Fair Value, Net |  | 309 |  |  |  | 309 |  | 1
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |  |  |  |  |  |  |  |
Derivative Asset, Fair Value, Gross Asset |  | 364 |  |  |  | 364 |  | 409
Derivative Liability, Fair Value, Gross Liability |  | 55 |  |  |  | 55 |  | 408
Reinsurance Recoverable [Member] |  |  |  |  |  |  |  |
Net Realized Capital Gains (Losses) [Line Items] |  |  |  |  |  |  |  |
Derivative, Notional Amount |  | 3,832 |  |  |  | 3,832 |  | 4,000
Derivative, Fair Value, Net |  | 138 |  |  |  | 138 |  | 162
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |  |  |  |  |  |  |  |
Derivative Asset, Fair Value, Gross Asset |  | 138 |  |  |  | 138 |  | 162
Derivative Liability, Fair Value, Gross Liability |  | 0 |  |  |  | 0 |  | 0
Other Policyholder Funds and Benefits Payable [Member] |  |  |  |  |  |  |  |
Net Realized Capital Gains (Losses) [Line Items] |  |  |  |  |  |  |  |
Derivative, Notional Amount |  | 14,122 |  |  |  | 14,122 |  | 15,149
Derivative, Fair Value, Net |  | (440) |  |  |  | (440) |  | (288)
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |  |  |  |  |  |  |  |
Derivative Asset, Fair Value, Gross Asset |  | 0 |  |  |  | 0 |  | 0
Derivative Liability, Fair Value, Gross Liability |  | $ 440 |  |  |  | $ 440 |  | $ 288
[1] | Primarily consists of changes in the value of non-qualifying derivatives and transactional foreign currency revaluation gains (losses). For the three months ended June 30, 2016 and 2015, transactional foreign currency revaluation gains (losses) were $(87) and $16, respectively, and related to yen denominated fixed payout annuity liabilities as well as the change in equity of a P&C runoff entity in the United Kingdom, which were largely offset by gains (losses) of $79 and $(17), respectively
[2] | Unrealized losses exclude the change in fair value of bifurcated embedded derivatives within certain securities, for which changes in fair value are recorded in net realized capital gains (losses).
[3] | As of June 30, 2016, and December 31, 2015, excludes equity securities, FVO which are included in equity securities, AFS on the Condensed Consolidated Balance Sheets.
[4] | Not included in this amount is the associated liability adjustment for changes in foreign exchange spot rates through realized capital gains (losses) of $(64) and $16 for the three months ended June 30, 2016 and 2015, respectively, and $(108) and $16 for the six months ended June 30, 2016 and 2015, respectively.
[5] | These derivatives are embedded within liabilities and are not held for risk management purposes.
[6] | The derivative instruments related to this strategy are held for other investment purposes.

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