Derivatives and Hedging Activities (Balance Sheet) (Details) - USD ($) $ in Millions		Jun. 30, 2017	Dec. 31, 2016
Derivatives and Hedging Activities
Notional amount		$ 136,747	$ 142,316
Derivative liability after application of master netting arrangements and cash collateral including embedded derivative liabilities		1,400	1,500
Gross fair value of assets	[1]	3,076	3,446
Gross fair value of liabilities	[2],[3]	3,721	4,262
Fair value of investment securities received as collateral		141	235
Fair value of investment securities received as collateral that can be repledged		140	118
Fair value of investment securities received as collateral that were repledged		13	19
GMWB and GMAB embedded derivatives [Member]
Derivatives and Hedging Activities
Gross fair value of assets		365	266
Gross fair value of liabilities		637	880
GMWB and GMAB embedded derivatives [Member] | Policyholder account balances, future policy benefits and claims [Member]
Derivatives and Hedging Activities
Gross fair value of liabilities	[2],[3],[4]	272	614
IUL embedded derivatives [Member] | Policyholder account balances, future policy benefits and claims [Member]
Derivatives and Hedging Activities
Gross fair value of liabilities	[2],[3]	527	464
EIA embedded derivatives [Member] | Policyholder account balances, future policy benefits and claims [Member]
Derivatives and Hedging Activities
Gross fair value of liabilities	[2],[3]	4	5
SMC embedded derivatives [Member] | Customer deposits [Member]
Derivatives and Hedging Activities
Gross fair value of liabilities	[2],[3]	8	8
Total embedded derivatives [Member]
Derivatives and Hedging Activities
Gross fair value of liabilities	[2],[3]	811	1,091
Derivatives designated as hedging instruments [Member]
Derivatives and Hedging Activities
Notional amount		689	839
Derivatives designated as hedging instruments [Member] | Other assets [Member]
Derivatives and Hedging Activities
Gross fair value of assets	[1]	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
Gross fair value of assets	[1]	35	40
Derivatives designated as hedging instruments [Member] | Foreign exchange contracts [Member]
Derivatives and Hedging Activities
Notional amount		14	164
Derivatives designated as hedging instruments [Member] | Foreign exchange contracts [Member] | Other assets [Member]
Derivatives and Hedging Activities
Gross fair value of assets	[1]		12
Derivatives not designated as hedging instruments [Member]
Derivatives and Hedging Activities
Notional amount		136,058	141,477
Derivatives not designated as hedging instruments [Member] | Other assets [Member]
Derivatives and Hedging Activities
Gross fair value of assets	[1]	3,041	3,394
Derivatives not designated as hedging instruments [Member] | Other liabilities [Member]
Derivatives and Hedging Activities
Gross fair value of liabilities	[2],[3]	2,910	3,171
Derivatives not designated as hedging instruments [Member] | Interest rate contracts [Member]
Derivatives and Hedging Activities
Notional amount		67,921	71,949
Derivatives not designated as hedging instruments [Member] | Interest rate contracts [Member] | Other assets [Member]
Derivatives and Hedging Activities
Gross fair value of assets	[1]	1,229	1,735
Derivatives not designated as hedging instruments [Member] | Interest rate contracts [Member] | Other liabilities [Member]
Derivatives and Hedging Activities
Gross fair value of liabilities	[2],[3]	451	979
Derivatives not designated as hedging instruments [Member] | Equity contracts [Member]
Derivatives and Hedging Activities
Notional amount		59,412	60,696
Derivatives not designated as hedging instruments [Member] | Equity contracts [Member] | Other assets [Member]
Derivatives and Hedging Activities
Gross fair value of assets	[1]	1,759	1,568
Derivatives not designated as hedging instruments [Member] | Equity contracts [Member] | Other liabilities [Member]
Derivatives and Hedging Activities
Gross fair value of liabilities	[2],[3]	2,291	2,027
Derivatives not designated as hedging instruments [Member] | Credit contracts [Member]
Derivatives and Hedging Activities
Notional amount		813	1,039
Derivatives not designated as hedging instruments [Member] | Credit contracts [Member] | Other assets [Member]
Derivatives and Hedging Activities
Gross fair value of assets	[1]	1	1
Derivatives not designated as hedging instruments [Member] | Foreign exchange contracts [Member]
Derivatives and Hedging Activities
Notional amount		4,487	4,733
Derivatives not designated as hedging instruments [Member] | Foreign exchange contracts [Member] | Other assets [Member]
Derivatives and Hedging Activities
Gross fair value of assets	[1]	46	81
Derivatives not designated as hedging instruments [Member] | Foreign exchange contracts [Member] | Other liabilities [Member]
Derivatives and Hedging Activities
Gross fair value of liabilities	[2],[3]	30	47
Derivatives not designated as hedging instruments [Member] | Other contracts [Member]
Derivatives and Hedging Activities
Notional amount		3,425	3,060
Derivatives not designated as hedging instruments [Member] | Other contracts [Member] | Other assets [Member]
Derivatives and Hedging Activities
Gross fair value of assets	[1]	6	9
Derivatives not designated as hedging instruments [Member] | Other contracts [Member] | Other liabilities [Member]
Derivatives and Hedging Activities
Gross fair value of liabilities	[2],[3]	$ 138	$ 118

[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 $1.4 billion and $1.5 billion as of June 30, 2017 and December 31, 2016, respectively. See Note 11 for additional information related to master netting arrangements and cash collateral.

[4] The fair value of the GMWB and GMAB embedded derivatives as of June 30, 2017 included $637 million of individual contracts in a liability position and $365 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.