Derivatives and Hedging Activities (Balance Sheet) (Details) - USD ($) $ in Millions		Dec. 31, 2015	Dec. 31, 2014
Derivatives and Hedging Activities
Notional amount		$ 143,479	$ 138,068
Asset	[1]	3,587	4,101
Liability	[2],[3]	4,300	4,688
Derivative liability after application of master netting arrangements and cash collateral including embedded derivative liabilities		1,600	1,500
Fair value of investment securities received as collateral		323	435
Fair value of investment securities received as collateral that can be repledged		193	151
Fair value of investment securities received as collateral that were repledged		0	0
GMWB and GMAB embedded derivatives [Member]
Derivatives and Hedging Activities
Asset		143	221
Liability		994	700
Embedded derivatives [Member]
Derivatives and Hedging Activities
Asset		0	0
Derivatives designated as hedging instruments [Member] | Interest rate contracts [Member]
Derivatives and Hedging Activities
Notional amount		675	1,025
Derivatives designated as hedging instruments [Member] | Interest rate contracts [Member] | Other assets [Member]
Derivatives and Hedging Activities
Asset	[1]	58	76
Derivatives not designated as hedging instruments [Member]
Derivatives and Hedging Activities
Notional amount		142,804	137,043
Derivatives not designated as hedging instruments [Member] | Other assets [Member]
Derivatives and Hedging Activities
Asset	[1]	3,529	4,025
Derivatives not designated as hedging instruments [Member] | Other liabilities [Member]
Derivatives and Hedging Activities
Liability	[2],[3]	3,076	3,955
Derivatives not designated as hedging instruments [Member] | Interest rate contracts [Member]
Derivatives and Hedging Activities
Notional amount		63,798	61,849
Derivatives not designated as hedging instruments [Member] | Interest rate contracts [Member] | Other assets [Member]
Derivatives and Hedging Activities
Asset	[1]	1,882	1,955
Derivatives not designated as hedging instruments [Member] | Interest rate contracts [Member] | Other liabilities [Member]
Derivatives and Hedging Activities
Liability	[2],[3]	969	1,136
Derivatives not designated as hedging instruments [Member] | Equity contracts [Member]
Derivatives and Hedging Activities
Notional amount		70,238	69,805
Derivatives not designated as hedging instruments [Member] | Equity contracts [Member] | Other assets [Member]
Derivatives and Hedging Activities
Asset	[1]	1,587	2,039
Derivatives not designated as hedging instruments [Member] | Equity contracts [Member] | Other liabilities [Member]
Derivatives and Hedging Activities
Liability	[2],[3]	1,993	2,702
Derivatives not designated as hedging instruments [Member] | Credit contracts [Member]
Derivatives and Hedging Activities
Notional amount		600	616
Derivatives not designated as hedging instruments [Member] | Credit contracts [Member] | Other assets [Member]
Derivatives and Hedging Activities
Asset	[1]	2	0
Derivatives not designated as hedging instruments [Member] | Foreign exchange contracts [Member]
Derivatives and Hedging Activities
Notional amount		4,408	2,029
Derivatives not designated as hedging instruments [Member] | Foreign exchange contracts [Member] | Other assets [Member]
Derivatives and Hedging Activities
Asset	[1]	56	30
Derivatives not designated as hedging instruments [Member] | Foreign exchange contracts [Member] | Other liabilities [Member]
Derivatives and Hedging Activities
Liability	[2],[3]	18	3
Derivatives not designated as hedging instruments [Member] | Other contracts [Member]
Derivatives and Hedging Activities
Notional amount		3,760	2,744
Derivatives not designated as hedging instruments [Member] | Other contracts [Member] | Other assets [Member]
Derivatives and Hedging Activities
Asset	[1]	2	1
Derivatives not designated as hedging instruments [Member] | Other contracts [Member] | Other liabilities [Member]
Derivatives and Hedging Activities
Liability	[2],[3]	96	114
Derivatives not designated as hedging instruments [Member] | GMWB and GMAB embedded derivatives [Member] | Policyholder account balances, future policy benefits and claims [Member]
Derivatives and Hedging Activities
Liability	[2],[3],[4]	851	479
Derivatives not designated as hedging instruments [Member] | IUL embedded derivatives [Member] | Policyholder account balances, future policy benefits and claims [Member]
Derivatives and Hedging Activities
Liability	[2],[3]	364	242
Derivatives not designated as hedging instruments [Member] | EIA embedded derivatives [Member] | Policyholder account balances, future policy benefits and claims [Member]
Derivatives and Hedging Activities
Liability	[2],[3]	5	6
Derivatives not designated as hedging instruments [Member] | SMC embedded derivatives [Member] | Customer deposits [Member]
Derivatives and Hedging Activities
Liability	[2],[3]	4	6
Derivatives not designated as hedging instruments [Member] | Embedded derivatives [Member]
Derivatives and Hedging Activities
Liability	[2],[3]	$ 1,224	$ 733

[1] The fair value of freestanding derivative assets is included in Other assets on the Consolidated Balance Sheets.

[2] The fair value of freestanding derivative liabilities is included in Other liabilities on the Consolidated Balance Sheets. The fair value of GMWB and GMAB, IUL, and EIA embedded derivatives is included in Policyholder account balances, future policy benefits and claims on the Consolidated Balance Sheets. The fair value of the SMC embedded derivative liability is included in Customer deposits on the Consolidated Balance Sheets.

[3] The fair value of the Company’s derivative liabilities after considering the effects of master netting arrangements, cash collateral held by the same counterparty and the fair value of net embedded derivatives was $1.6 billion and $1.5 billion at December 31, 2015 and 2014, respectively. See Note 15 for additional information related to master netting arrangements and cash collateral. See Note 4 for information about derivatives held by consolidated VIEs.

[4] The fair value of the GMWB and GMAB embedded derivatives at December 31, 2015 included $994 million of individual contracts in a liability position and $143 million of individual contracts in an asset position. The fair value of the GMWB and GMAB embedded derivatives at December 31, 2014 included $700 million of individual contracts in a liability position and $221 million of individual contracts in an asset position.