Derivatives and Hedging Activities (Balance Sheet) (Details) - USD ($) $ in Millions		Dec. 31, 2018	Dec. 31, 2017
Derivatives and Hedging Activities
Notional amount		$ 119,220	$ 131,433
Asset	[1]	2,574	3,563
Liability	[2],[3]	3,610	3,895
Derivative liability after application of master netting arrangements and cash collateral including embedded derivative liabilities		1,400	1,300
Fair value of investment securities received as collateral		28	89
Fair value of investment securities received as collateral that can be repledged		28	89
Fair value of investment securities received as collateral that were repledged		0	0
GMWB and GMAB embedded derivatives [Member]
Derivatives and Hedging Activities
Asset		318	492
Liability		646	443
GMWB and GMAB embedded derivatives [Member] | Policyholder account balances, future policy benefits and claims [Member]
Derivatives and Hedging Activities
Liability	[2],[3],[4]	328	(49)
IUL embedded derivatives [Member] | Policyholder account balances, future policy benefits and claims [Member]
Derivatives and Hedging Activities
Liability	[2],[3]	628	601
Indexed annuity embedded derivatives [Member] | Policyholder account balances, future policy benefits and claims [Member]
Derivatives and Hedging Activities
Liability	[2],[3]	17	5
SMC embedded derivatives [Member] | Customer deposits [Member]
Derivatives and Hedging Activities
Liability	[2],[3]	6	10
Embedded derivatives [Member]
Derivatives and Hedging Activities
Asset	[1]	0	0
Liability	[2],[3]	979	567
Derivatives designated as hedging instruments [Member]
Derivatives and Hedging Activities
Notional amount		778	762
Derivatives designated as hedging instruments [Member] | Other assets [Member]
Derivatives and Hedging Activities
Asset	[1]	8	23
Derivatives designated as hedging instruments [Member] | Other liabilities [Member]
Derivatives and Hedging Activities
Liability	[2],[3]	0	4
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]	7	23
Derivatives designated as hedging instruments [Member] | Foreign exchange contracts [Member]
Derivatives and Hedging Activities
Notional amount		103	87
Derivatives designated as hedging instruments [Member] | Foreign exchange contracts [Member] | Other assets [Member]
Derivatives and Hedging Activities
Asset	[1]	1
Derivatives designated as hedging instruments [Member] | Foreign exchange contracts [Member] | Other liabilities [Member]
Derivatives and Hedging Activities
Liability	[2],[3]		4
Derivatives not designated as hedging instruments [Member]
Derivatives and Hedging Activities
Notional amount		118,442	130,671
Derivatives not designated as hedging instruments [Member] | Other assets [Member]
Derivatives and Hedging Activities
Asset	[1]	2,566	3,540
Derivatives not designated as hedging instruments [Member] | Other liabilities [Member]
Derivatives and Hedging Activities
Liability	[2],[3]	2,631	3,324
Derivatives not designated as hedging instruments [Member] | Interest rate contracts [Member]
Derivatives and Hedging Activities
Notional amount		58,244	66,043
Derivatives not designated as hedging instruments [Member] | Interest rate contracts [Member] | Other assets [Member]
Derivatives and Hedging Activities
Asset	[1]	789	1,081
Derivatives not designated as hedging instruments [Member] | Interest rate contracts [Member] | Other liabilities [Member]
Derivatives and Hedging Activities
Liability	[2],[3]	424	416
Derivatives not designated as hedging instruments [Member] | Equity contracts [Member]
Derivatives and Hedging Activities
Notional amount		54,079	59,292
Derivatives not designated as hedging instruments [Member] | Equity contracts [Member] | Other assets [Member]
Derivatives and Hedging Activities
Asset	[1]	1,718	2,423
Derivatives not designated as hedging instruments [Member] | Equity contracts [Member] | Other liabilities [Member]
Derivatives and Hedging Activities
Liability	[2],[3]	2,154	2,883
Derivatives not designated as hedging instruments [Member] | Credit contracts [Member]
Derivatives and Hedging Activities
Notional amount		1,209	721
Derivatives not designated as hedging instruments [Member] | Credit contracts [Member] | Other liabilities [Member]
Derivatives and Hedging Activities
Liability	[2],[3]	18	2
Derivatives not designated as hedging instruments [Member] | Foreign exchange contracts [Member]
Derivatives and Hedging Activities
Notional amount		4,908	4,163
Derivatives not designated as hedging instruments [Member] | Foreign exchange contracts [Member] | Other assets [Member]
Derivatives and Hedging Activities
Asset	[1]	59	36
Derivatives not designated as hedging instruments [Member] | Foreign exchange contracts [Member] | Other liabilities [Member]
Derivatives and Hedging Activities
Liability	[2],[3]	35	23
Derivatives not designated as hedging instruments [Member] | Other contracts [Member]
Derivatives and Hedging Activities
Notional amount		$ 2	$ 452

[1] The fair value of freestanding derivative assets is included in Other assets 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 $1.4 billion and $1.3 billion as of December 31, 2018 and 2017, respectively. See Note 16 for additional information related to master netting arrangements and cash collateral. See Note 5 for information about derivatives held by consolidated VIEs.

[3] 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 indexed annuity 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.

[4] The fair value of the GMWB and GMAB embedded derivatives as of December 31, 2018 included $646 million of individual contracts in a liability position and $318 million of individual contracts in an asset position. The fair value of the GMWB and GMAB embedded derivatives as of December 31, 2017 included $443 million of individual contracts in a liability position and $492 million of individual contracts in an asset position.