Derivatives and Hedging Activities (Balance Sheet) (Details) - USD ($) $ in Millions		Dec. 31, 2016	Dec. 31, 2015
Derivatives and Hedging Activities
Notional amount		$ 142,316	$ 143,479
Asset	[1]	3,446	3,587
Liability	[2],[3]	4,262	4,300
Derivative liability after application of master netting arrangements and cash collateral including embedded derivative liabilities		1,500	1,600
Fair value of investment securities received as collateral		235	323
Fair value of investment securities received as collateral that can be repledged		118	193
Fair value of investment securities received as collateral that were repledged		19	0
GMWB and GMAB embedded derivatives [Member]
Derivatives and Hedging Activities
Asset		266	143
Liability		880	994
GMWB and GMAB embedded derivatives [Member] | Policyholder account balances, future policy benefits and claims [Member]
Derivatives and Hedging Activities
Liability	[2],[3],[4]	614	851
IUL embedded derivatives [Member] | Policyholder account balances, future policy benefits and claims [Member]
Derivatives and Hedging Activities
Liability	[2],[3]	464	364
EIA embedded derivatives [Member] | Policyholder account balances, future policy benefits and claims [Member]
Derivatives and Hedging Activities
Liability	[2],[3]	5	5
SMC embedded derivatives [Member] | Customer deposits [Member]
Derivatives and Hedging Activities
Liability	[2],[3]	8	4
Embedded derivatives [Member]
Derivatives and Hedging Activities
Asset	[1]	0	0
Liability	[2],[3]	1,091	1,224
Derivatives designated as hedging instruments [Member]
Derivatives and Hedging Activities
Notional amount		839	675
Derivatives designated as hedging instruments [Member] | Other assets [Member]
Derivatives and Hedging Activities
Asset	[1]	52	58
Derivatives designated as hedging instruments [Member] | Interest rate contracts [Member]
Derivatives and Hedging Activities
Notional amount		675	675
Derivatives designated as hedging instruments [Member] | Interest rate contracts [Member] | Other assets [Member]
Derivatives and Hedging Activities
Asset	[1]	40	58
Derivatives designated as hedging instruments [Member] | Foreign exchange contracts [Member]
Derivatives and Hedging Activities
Notional amount		164
Derivatives designated as hedging instruments [Member] | Foreign exchange contracts [Member] | Other assets [Member]
Derivatives and Hedging Activities
Asset	[1]	12
Derivatives not designated as hedging instruments [Member]
Derivatives and Hedging Activities
Notional amount		141,477	142,804
Derivatives not designated as hedging instruments [Member] | Other assets [Member]
Derivatives and Hedging Activities
Asset	[1]	3,394	3,529
Derivatives not designated as hedging instruments [Member] | Other liabilities [Member]
Derivatives and Hedging Activities
Liability	[2],[3]	3,171	3,076
Derivatives not designated as hedging instruments [Member] | Interest rate contracts [Member]
Derivatives and Hedging Activities
Notional amount		71,949	63,798
Derivatives not designated as hedging instruments [Member] | Interest rate contracts [Member] | Other assets [Member]
Derivatives and Hedging Activities
Asset	[1]	1,735	1,882
Derivatives not designated as hedging instruments [Member] | Interest rate contracts [Member] | Other liabilities [Member]
Derivatives and Hedging Activities
Liability	[2],[3]	979	969
Derivatives not designated as hedging instruments [Member] | Equity contracts [Member]
Derivatives and Hedging Activities
Notional amount		60,696	70,238
Derivatives not designated as hedging instruments [Member] | Equity contracts [Member] | Other assets [Member]
Derivatives and Hedging Activities
Asset	[1]	1,568	1,587
Derivatives not designated as hedging instruments [Member] | Equity contracts [Member] | Other liabilities [Member]
Derivatives and Hedging Activities
Liability	[2],[3]	2,027	1,993
Derivatives not designated as hedging instruments [Member] | Credit contracts [Member]
Derivatives and Hedging Activities
Notional amount		1,039	600
Derivatives not designated as hedging instruments [Member] | Credit contracts [Member] | Other assets [Member]
Derivatives and Hedging Activities
Asset	[1]	1	2
Derivatives not designated as hedging instruments [Member] | Foreign exchange contracts [Member]
Derivatives and Hedging Activities
Notional amount		4,733	4,408
Derivatives not designated as hedging instruments [Member] | Foreign exchange contracts [Member] | Other assets [Member]
Derivatives and Hedging Activities
Asset	[1]	81	56
Derivatives not designated as hedging instruments [Member] | Foreign exchange contracts [Member] | Other liabilities [Member]
Derivatives and Hedging Activities
Liability	[2],[3]	47	18
Derivatives not designated as hedging instruments [Member] | Other contracts [Member]
Derivatives and Hedging Activities
Notional amount		3,060	3,760
Derivatives not designated as hedging instruments [Member] | Other contracts [Member] | Other assets [Member]
Derivatives and Hedging Activities
Asset	[1]	9	2
Derivatives not designated as hedging instruments [Member] | Other contracts [Member] | Other liabilities [Member]
Derivatives and Hedging Activities
Liability	[2],[3]	$ 118	$ 96

[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 $1.5 billion and $1.6 billion at December 31, 2016 and 2015, 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, 2016 included $880 million of individual contracts in a liability position and $266 million of individual contracts in an asset position. 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.