Derivatives and Hedging Activities (Balance Sheet) (Details) - USD ($) $ in Millions		Jun. 30, 2019	Dec. 31, 2018
Derivatives and Hedging Activities
Notional amount		$ 121,299	$ 119,220
Derivative liability after application of master netting arrangements and cash collateral including embedded derivative liabilities		2,300	1,400
Gross fair value of assets	[1]	3,636	2,574
Gross fair value of liabilities	[2],[3]	4,860	3,610
Fair value of investment securities received as collateral		68	28
Fair value of investment securities received as collateral that can be repledged		68	28
Fair value of investment securities received as collateral that were repledged		0	0
GMWB and GMAB embedded derivatives [Member]
Derivatives and Hedging Activities
Gross fair value of assets		231	318
Gross fair value of liabilities		927	646
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]	696	328
IUL embedded derivatives [Member] | Policyholder account balances, future policy benefits and claims [Member]
Derivatives and Hedging Activities
Gross fair value of liabilities	[2],[3]	819	628
Indexed annuity embedded derivatives [Member] | Policyholder account balances, future policy benefits and claims [Member]
Derivatives and Hedging Activities
Gross fair value of liabilities	[2],[3]	34	17
SMC embedded derivatives [Member] | Customer deposits [Member]
Derivatives and Hedging Activities
Gross fair value of liabilities	[2],[3]	13	6
Total embedded derivatives [Member]
Derivatives and Hedging Activities
Gross fair value of liabilities	[2],[3]	1,562	979
Designated as Hedging Instrument [Member]
Derivatives and Hedging Activities
Notional amount		477	778
Designated as Hedging Instrument [Member] | Other assets [Member]
Derivatives and Hedging Activities
Gross fair value of assets	[1]	8	8
Designated as Hedging Instrument [Member] | Other liabilities [Member]
Derivatives and Hedging Activities
Gross fair value of liabilities	[2],[3]	0	0
Designated as Hedging Instrument [Member] | Interest rate contracts [Member]
Derivatives and Hedging Activities
Notional amount		375	675
Designated as Hedging Instrument [Member] | Interest rate contracts [Member] | Other assets [Member]
Derivatives and Hedging Activities
Gross fair value of assets	[1]	6	7
Designated as Hedging Instrument [Member] | Foreign exchange contracts [Member]
Derivatives and Hedging Activities
Notional amount		102	103
Designated as Hedging Instrument [Member] | Foreign exchange contracts [Member] | Other assets [Member]
Derivatives and Hedging Activities
Gross fair value of assets	[1]	2	1
Designated as Hedging Instrument [Member] | Foreign exchange contracts [Member] | Other liabilities [Member]
Derivatives and Hedging Activities
Gross fair value of liabilities	[2],[3]		0
Derivatives not designated as hedging instruments [Member]
Derivatives and Hedging Activities
Notional amount		120,822	118,442
Derivatives not designated as hedging instruments [Member] | Other assets [Member]
Derivatives and Hedging Activities
Gross fair value of assets	[1]	3,628	2,566
Derivatives not designated as hedging instruments [Member] | Other liabilities [Member]
Derivatives and Hedging Activities
Gross fair value of liabilities	[2],[3]	3,298	2,631
Derivatives not designated as hedging instruments [Member] | Interest rate contracts [Member]
Derivatives and Hedging Activities
Notional amount		60,020	58,244
Derivatives not designated as hedging instruments [Member] | Interest rate contracts [Member] | Other assets [Member]
Derivatives and Hedging Activities
Gross fair value of assets	[1]	1,408	789
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]	410	424
Derivatives not designated as hedging instruments [Member] | Equity contracts [Member]
Derivatives and Hedging Activities
Notional amount		54,662	54,079
Derivatives not designated as hedging instruments [Member] | Equity contracts [Member] | Other assets [Member]
Derivatives and Hedging Activities
Gross fair value of assets	[1]	2,167	1,718
Derivatives not designated as hedging instruments [Member] | Equity contracts [Member] | Other liabilities [Member]
Derivatives and Hedging Activities
Gross fair value of liabilities	[2],[3]	2,837	2,154
Derivatives not designated as hedging instruments [Member] | Credit contracts [Member]
Derivatives and Hedging Activities
Notional amount		1,340	1,209
Derivatives not designated as hedging instruments [Member] | Credit contracts [Member] | Other assets [Member]
Derivatives and Hedging Activities
Gross fair value of assets	[1]	0	0
Derivatives not designated as hedging instruments [Member] | Credit contracts [Member] | Other liabilities [Member]
Derivatives and Hedging Activities
Gross fair value of liabilities	[2],[3]	12	18
Derivatives not designated as hedging instruments [Member] | Foreign exchange contracts [Member]
Derivatives and Hedging Activities
Notional amount		4,799	4,908
Derivatives not designated as hedging instruments [Member] | Foreign exchange contracts [Member] | Other assets [Member]
Derivatives and Hedging Activities
Gross fair value of assets	[1]	53	59
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]	39	35
Derivatives not designated as hedging instruments [Member] | Other contracts [Member]
Derivatives and Hedging Activities
Notional amount		$ 1	$ 2

[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 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.

[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 $2.3 billion and $1.4 billion as of June 30, 2019 and December 31, 2018, respectively. See Note 12 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, 2019 included $927 million of individual contracts in a liability position and $231 million of individual contracts in an asset position. 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.