Separate Accounts, Death Benefits and Other Insurance Benefit Features Level 4 (Details) - USD ($) $ in Millions		6 Months Ended
		Jun. 30, 2016		Jun. 30, 2015	Dec. 31, 2015
Minimum Guarantees, Net Amount at Risk [Abstract]
Net Amount at Risk by Product and Guarantee, General Account Value	[1],[2]	$ 18,970
Net Amount at Risk by Product and Guarantee, Net Amount at Risk	[2],[3]	3,380
Net Amount at Risk by Product and Guarantee, Separate Account Value	[1],[2]	79,917
Separate Accounts, Liability		117,851	[1],[2]		$ 120,111
Schedule of Fair Value of Separate Accounts [Abstract]
Schedule of Fair Value of Separate Accounts by Major Category of Investment, Fair Value		$ 37,934			$ 40,423
Invested in Fixed Income Securities		17.00%			17.00%
Invested in Equity Securities		83.00%			83.00%
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		$ 34,783			$ 36,970
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		3,151			$ 3,453
Guaranteed Lifetime Withdrawal Benefit [Member]
Minimum Guarantees, Net Amount at Risk [Abstract]
Net Amount at Risk by Product and Guarantee, General Account Value		6,600
Secondary Guarantees [Member] | Universal Life [Member]
Changes in the gross U.S. GMDB and UL secondary guarantee benefits
Liability, balance, beginning of period	[4]	2,313		$ 2,041
Incurred	[4],[5]	158		135
Paid	[4]	0
Liability balance, end of period	[4]	2,471		2,176
Reinsurance recoverable asset, beginning of period	[4]	2,313		2,041
Reinsurance Recoverables on Unpaid Losses	[4],[5]	158		135
Reinsurance Recoverables on Paid Losses	[4]	0
Reinsurance recoverable asset, end of period	[4]	2,471		2,176
Annuitization Benefit [Member]
Minimum Guarantees, Net Amount at Risk [Abstract]
Net Amount at Risk by Product and Guarantee, Net Amount at Risk	[2],[3]	597
Guaranteed Minimum Death Benefit [Member]
Changes in the gross U.S. GMDB and UL secondary guarantee benefits
Liability, balance, beginning of period	[4],[6]	863		812
Incurred	[4],[5],[6]	41		20
Paid	[4],[6]	(66)		(56)
Liability balance, end of period	[4],[6]	838		776
Reinsurance recoverable asset, beginning of period	[4],[6]	523		480
Reinsurance Recoverables on Unpaid Losses	[4],[5],[6]	32		52
Reinsurance Recoverables on Paid Losses	[4],[6]	51		45
Reinsurance recoverable asset, end of period	[4],[6]	504		$ 487
Minimum Guarantees, Net Amount at Risk [Abstract]
Net Amount at Risk by Product and Guarantee, General Account Value	[1],[2]	$ 3,804
Net Amount at Risk by Product and Guarantee, Weighted Average Attained Age	[2],[7]	70 years
Separate Accounts, Liability	[1],[2]	$ 37,934
Guaranteed Minimum Death Benefit [Member] | Variable Annuity [Member]
Minimum Guarantees, Net Amount at Risk [Abstract]
Net Amount at Risk by Product and Guarantee, General Account Value	[1],[2],[7]	41,738
Reset [Member]
Minimum Guarantees, Net Amount at Risk [Abstract]
Net Amount at Risk by Product and Guarantee, General Account Value	[1],[2],[8]	$ 2,453
Net Amount at Risk by Product and Guarantee, Weighted Average Attained Age	[2],[8]	70 years
Lifetime Income Benefit ("LIB") - Death Benefit [Member]
Minimum Guarantees, Net Amount at Risk [Abstract]
Net Amount at Risk by Product and Guarantee, General Account Value	[1],[2],[9]	$ 483
Net Amount at Risk by Product and Guarantee, Weighted Average Attained Age	[2],[9]	69 years
Asset Protection Benefit ("APB") [Member]
Minimum Guarantees, Net Amount at Risk [Abstract]
Net Amount at Risk by Product and Guarantee, General Account Value	[1],[2],[10]	$ 10,850
Net Amount at Risk by Product and Guarantee, Weighted Average Attained Age	[2],[10]	69 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]	$ 470
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],[11]	$ 3,507
Net Amount at Risk by Product and Guarantee, Weighted Average Attained Age	[2],[11]	70 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],[12]	$ 1,192
Net Amount at Risk by Product and Guarantee, Weighted Average Attained Age	[2],[12]	71 years
MAV Only [Member]
Minimum Guarantees, Net Amount at Risk [Abstract]
Net Amount at Risk by Product and Guarantee, General Account Value	[1],[2]	$ 13,801
Net Amount at Risk by Product and Guarantee, Weighted Average Attained Age	[2]	71 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],[2],[13]	$ 8,982
Net Amount at Risk by Product and Guarantee, Weighted Average Attained Age	[2],[13]	68 years
Guaranteed Minimum Withdrawal Benefit [Member]
Minimum Guarantees, Net Amount at Risk [Abstract]
Net Amount at Risk by Product and Guarantee, Net Amount at Risk		$ 0
Net Amount at Risk by Product and Guarantee, Weighted Average Attained Age		72 years
MAV Only [Member]
Minimum Guarantees, Net Amount at Risk [Abstract]
Net Amount at Risk by Product and Guarantee, Net Amount at Risk	[2],[3]	$ 2,599
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]	429
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],[12]	215
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],[12]	71
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],[11]	463
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],[11]	74
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]	103
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
Asset Protection Benefit ("APB") [Member]
Minimum Guarantees, Net Amount at Risk [Abstract]
Net Amount at Risk by Product and Guarantee, Net Amount at Risk	[2],[3],[10]	392
Asset Protection Benefit ("APB") [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],[10]	261
Lifetime Income Benefit ("LIB") - Death Benefit [Member]
Minimum Guarantees, Net Amount at Risk [Abstract]
Net Amount at Risk by Product and Guarantee, Net Amount at Risk	[2],[3],[9]	8
Lifetime Income Benefit ("LIB") - 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	[2],[3],[9]	8
Reset [Member]
Minimum Guarantees, Net Amount at Risk [Abstract]
Net Amount at Risk by Product and Guarantee, Net Amount at Risk	[2],[3],[8]	31
Reset [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],[8]	30
Return of Net Deposit [Member]
Minimum Guarantees, Net Amount at Risk [Abstract]
Net Amount at Risk by Product and Guarantee, Net Amount at Risk	[2],[3],[13]	74
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	[2],[3],[13]	69
Guaranteed Minimum Death Benefit [Member]
Minimum Guarantees, Net Amount at Risk [Abstract]
Net Amount at Risk by Product and Guarantee, Net Amount at Risk	[2],[3],[7]	3,885
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	[2],[3],[7]	$ 965

[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] [1] Included in Reserve for future policy benefits and unpaid losses and loss adjustment expenses on the Condensed Consolidated Balance Sheets.

[5] [3]Includes the portion of assessments established as additions to reserves as well as changes in estimates affecting the reserves.

[6] [2]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.

[7] 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 $6.6 billion of total account value and weighted average attained age of 72 years. There is no NAR or retained NAR related to these contracts.

[8] 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).

[9] LIB GMDB is the greatest of current AV; net premiums paid; or, for certain contracts, a benefit amount generally based on market performance that ratchets over time.

[10] APB GMDB is the greater of current AV or MAV, not to exceed current AV plus 25% times the greater of net premiums and MAV (each adjusted for premiums in the past 12 months).

[11] EPB GMDB is the greatest of the MAV, current AV, or contract value plus a percentage of the contract’s growth. The contract’s growth is AV less premiums net of withdrawals, subject to a cap of 200% of premiums net of withdrawals.

[12] Rollup GMDB is the greatest of the MAV, current AV, net premium paid and premiums (adjusted for withdrawals) accumulated at generally 5% simple interest up to the earlier of age 80 years or 100% of adjusted premiums.

[13] ROP GMDB is the greater of current AV or net premiums paid.