Separate Accounts, Death Benefits and Other Insurance Benefit Features Level 4 (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Changes in the gross U.S. GMDB and UL secondary guarantee benefits
Liability, balance, beginning of period	$ 14,000	$ 13,850
Incurred	537	570
Paid	(444)	(452)
Liability balance, end of period	14,191	14,391
Reinsurance recoverable asset, beginning of period	4,756	4,659
Reinsurance Recoverables on Unpaid Losses	198	225
Reinsurance Recoverables on Paid Losses	70	83
Reinsurance recoverable asset, end of period	4,884	4,801
Minimum Guarantees, Net Amount at Risk [Abstract]
Net Amount at Risk by Product and Guarantee, General Account Value	18,736
Net Amount at Risk by Product and Guarantee, Net Amount at Risk	2,871
Net Amount at Risk by Product and Guarantee, Separate Account Value	79,764
Separate Accounts, Liability	116,746		$ 115,665
Schedule of Fair Value of Separate Accounts [Abstract]
Schedule of Fair Value of Separate Accounts by Major Category of Investment, Fair Value	$ 36,982		$ 36,925
Invested in Fixed Income Securities	15.00%		16.00%
Invested in Equity Securities	85.00%		84.00%
Liabilities for Guarantees on Long-Duration Contracts, Other Liability Adjustments	$ 98	423
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	34,135		$ 33,880
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	2,847		$ 3,045
Guaranteed Lifetime Withdrawal Benefit [Member]
Minimum Guarantees, Net Amount at Risk [Abstract]
Net Amount at Risk by Product and Guarantee, General Account Value	6,300
Secondary Guarantees [Member] | Universal Life [Member]
Changes in the gross U.S. GMDB and UL secondary guarantee benefits
Liability, balance, beginning of period	2,627	2,313
Incurred	149	158
Liability balance, end of period	2,776	2,471
Reinsurance recoverable asset, beginning of period	2,627	2,313
Reinsurance Recoverables on Unpaid Losses	149	158
Reinsurance recoverable asset, end of period	2,776	2,471
Schedule of Fair Value of Separate Accounts [Abstract]
Liabilities for Guarantees on Long-Duration Contracts, Other Liability Adjustments	0	0
Annuitization Benefit [Member]
Changes in the gross U.S. GMDB and UL secondary guarantee benefits
Liability, balance, beginning of period	10,587	10,674
Incurred	355	371
Paid	(392)	(386)
Liability balance, end of period	10,648	11,082
Reinsurance recoverable asset, beginning of period	1,697	1,823
Reinsurance Recoverables on Unpaid Losses	27	35
Reinsurance Recoverables on Paid Losses	27	32
Reinsurance recoverable asset, end of period	1,697	1,826
Minimum Guarantees, Net Amount at Risk [Abstract]
Net Amount at Risk by Product and Guarantee, Net Amount at Risk	467
Schedule of Fair Value of Separate Accounts [Abstract]
Liabilities for Guarantees on Long-Duration Contracts, Other Liability Adjustments	98	423
Guaranteed Minimum Death Benefit [Member]
Changes in the gross U.S. GMDB and UL secondary guarantee benefits
Liability, balance, beginning of period	786	863
Incurred	33	41
Paid	(52)	(66)
Liability balance, end of period	767	838
Reinsurance recoverable asset, beginning of period	432	523
Reinsurance Recoverables on Unpaid Losses	22	32
Reinsurance Recoverables on Paid Losses	43	51
Reinsurance recoverable asset, end of period	411	504
Minimum Guarantees, Net Amount at Risk [Abstract]
Net Amount at Risk by Product and Guarantee, General Account Value	$ 3,686
Net Amount at Risk by Product and Guarantee, Weighted Average Attained Age	71 years
Separate Accounts, Liability	$ 36,982
Schedule of Fair Value of Separate Accounts [Abstract]
Liabilities for Guarantees on Long-Duration Contracts, Other Liability Adjustments	0	$ 0
Guaranteed Minimum Death Benefit [Member] | Deferred Annuitization [Member]
Minimum Guarantees, Net Amount at Risk [Abstract]
Net Amount at Risk by Product and Guarantee, General Account Value	1,600
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	40,668
Reset [Member]
Minimum Guarantees, Net Amount at Risk [Abstract]
Net Amount at Risk by Product and Guarantee, General Account Value	$ 2,437
Net Amount at Risk by Product and Guarantee, Weighted Average Attained Age	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	$ 459
Net Amount at Risk by Product and Guarantee, Weighted Average Attained Age	70 years
Asset Protection Benefit ("APB") [Member]
Minimum Guarantees, Net Amount at Risk [Abstract]
Net Amount at Risk by Product and Guarantee, General Account Value	$ 10,243
Net Amount at Risk by Product and Guarantee, Weighted Average Attained Age	70 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
Net Amount at Risk by Product and Guarantee, Weighted Average Attained Age	73 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
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
Net Amount at Risk by Product and Guarantee, Weighted Average Attained Age	71 years
MAV Only [Member]
Minimum Guarantees, Net Amount at Risk [Abstract]
Net Amount at Risk by Product and Guarantee, General Account Value	$ 13,641
Net Amount at Risk by Product and Guarantee, Weighted Average Attained Age	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	$ 8,793
Net Amount at Risk by Product and Guarantee, Weighted Average Attained Age	71 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	73 years
MAV Only [Member]
Minimum Guarantees, Net Amount at Risk [Abstract]
Net Amount at Risk by Product and Guarantee, Net Amount at Risk	$ 2,109
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
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
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
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
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
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
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
Asset Protection Benefit ("APB") [Member]
Minimum Guarantees, Net Amount at Risk [Abstract]
Net Amount at Risk by Product and Guarantee, Net Amount at Risk	114
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	76
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	5
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	5
Reset [Member]
Minimum Guarantees, Net Amount at Risk [Abstract]
Net Amount at Risk by Product and Guarantee, Net Amount at Risk	7
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
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
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
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
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