Derivatives and Hedging Activities (Balance Sheet) (Details) - USD ($) $ in Millions		Mar. 31, 2017	Dec. 31, 2016
Derivatives and Hedging Activities
Notional amount		$ 142,723	$ 142,316
Derivative Liability After Application Of Master Netting Arrangements And Cash Collateral Including Embedded Derivative Liabilities		1,200	1,500
Derivative liabilities, gross liabilities	[1],[2]	3,578	4,262
Derivative asset, gross asset	[3]	2,871	3,446
Fair value of derivative collateral		229	235
Fair Value of Securities Received as Collateral that Can be Resold or Repledged		124	118
Fair Value of Securities Received as Collateral that Have Been Resold or Repledged		14	19
GMWB and GMAB [Member]
Derivatives and Hedging Activities
Derivative liabilities, gross liabilities		585	880
Derivative liabilities, gross asset		397	266
GMWB and GMAB [Member] | Policyholder account balances, future policy benefits and claims [Member]
Derivatives and Hedging Activities
Derivative liabilities, gross liabilities	[1],[2],[4]	188	614
IUL [Member] | Policyholder account balances, future policy benefits and claims [Member]
Derivatives and Hedging Activities
Derivative liabilities, gross liabilities	[1],[2]	493	464
EIA embedded derivatives [Member] | Policyholder account balances, future policy benefits and claims [Member]
Derivatives and Hedging Activities
Derivative liabilities, gross liabilities	[1],[2]	4	5
SMC [Member] | Customer deposits [Member]
Derivatives and Hedging Activities
Derivative liabilities, gross liabilities	[1],[2]	9	8
Total embedded derivatives [Member]
Derivatives and Hedging Activities
Derivative liabilities, gross liabilities	[1],[2]	694	1,091
Derivatives designated as hedging instruments [Member]
Derivatives and Hedging Activities
Notional amount		695	839
Derivatives designated as hedging instruments [Member] | Other assets [Member]
Derivatives and Hedging Activities
Derivative asset, gross asset	[3]	35	52
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
Derivative asset, gross asset	[3]	35	40
Derivatives designated as hedging instruments [Member] | Foreign exchange contracts [Member]
Derivatives and Hedging Activities
Notional amount		20	164
Derivatives designated as hedging instruments [Member] | Foreign exchange contracts [Member] | Other assets [Member]
Derivatives and Hedging Activities
Derivative asset, gross asset	[3]		12
Derivatives not designated as hedging instruments [Member]
Derivatives and Hedging Activities
Notional amount		142,028	141,477
Derivatives not designated as hedging instruments [Member] | Other assets [Member]
Derivatives and Hedging Activities
Derivative asset, gross asset	[3]	2,836	3,394
Derivatives not designated as hedging instruments [Member] | Other liabilities [Member]
Derivatives and Hedging Activities
Derivative liabilities, gross liabilities	[1],[2]	2,884	3,171
Derivatives not designated as hedging instruments [Member] | Interest rate contracts [Member]
Derivatives and Hedging Activities
Notional amount		70,724	71,949
Derivatives not designated as hedging instruments [Member] | Interest rate contracts [Member] | Other assets [Member]
Derivatives and Hedging Activities
Derivative asset, gross asset	[3]	1,107	1,735
Derivatives not designated as hedging instruments [Member] | Interest rate contracts [Member] | Other liabilities [Member]
Derivatives and Hedging Activities
Derivative liabilities, gross liabilities	[1],[2]	464	979
Derivatives not designated as hedging instruments [Member] | Equity contracts [Member]
Derivatives and Hedging Activities
Notional amount		60,262	60,696
Derivatives not designated as hedging instruments [Member] | Equity contracts [Member] | Other assets [Member]
Derivatives and Hedging Activities
Derivative asset, gross asset	[3]	1,667	1,568
Derivatives not designated as hedging instruments [Member] | Equity contracts [Member] | Other liabilities [Member]
Derivatives and Hedging Activities
Derivative liabilities, gross liabilities	[1],[2]	2,247	2,027
Derivatives not designated as hedging instruments [Member] | Credit contracts [Member]
Derivatives and Hedging Activities
Notional amount		1,148	1,039
Derivatives not designated as hedging instruments [Member] | Credit contracts [Member] | Other assets [Member]
Derivatives and Hedging Activities
Derivative asset, gross asset	[3]	1	1
Derivatives not designated as hedging instruments [Member] | Foreign exchange contracts [Member]
Derivatives and Hedging Activities
Notional amount		4,709	4,733
Derivatives not designated as hedging instruments [Member] | Foreign exchange contracts [Member] | Other assets [Member]
Derivatives and Hedging Activities
Derivative asset, gross asset	[3]	60	81
Derivatives not designated as hedging instruments [Member] | Foreign exchange contracts [Member] | Other liabilities [Member]
Derivatives and Hedging Activities
Derivative liabilities, gross liabilities	[1],[2]	38	47
Derivatives not designated as hedging instruments [Member] | Other derivative contracts [Member]
Derivatives and Hedging Activities
Notional amount		5,185	3,060
Derivatives not designated as hedging instruments [Member] | Other derivative contracts [Member] | Other assets [Member]
Derivatives and Hedging Activities
Derivative asset, gross asset	[3]	1	9
Derivatives not designated as hedging instruments [Member] | Other derivative contracts [Member] | Other liabilities [Member]
Derivatives and Hedging Activities
Derivative liabilities, gross liabilities	[1],[2]	$ 135	$ 118

[1] 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.

[2] 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 $1.2 billion and $1.5 billion as of March 31, 2017 and December 31, 2016, respectively. See Note 11 for additional information related to master netting arrangements and cash collateral. See Note 3 for information about derivatives held by consolidated VIEs.

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

[4] The fair value of the GMWB and GMAB embedded derivatives as of March 31, 2017 included $585 million of individual contracts in a liability position and $397 million of individual contracts in an asset position. The fair value of the GMWB and GMAB embedded derivatives as of December 31, 2016 included $880 million of individual contracts in a liability position and $266 million of individual contracts in an asset position.