Derivatives and Hedging Activities (Balance Sheet) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2014		Dec. 31, 2013
Derivatives and Hedging Activities
Asset	$ 3,263		$ 3,261
Derivatives not designated as hedging instruments
Derivatives and Hedging Activities
Asset	3,263		3,261
Liability	3,939		4,187
Derivatives not designated as hedging instruments | GMWB and GMAB
Derivatives and Hedging Activities
Asset	3,229		3,230
Liability	3,726		4,015
Derivatives not designated as hedging instruments | GMWB and GMAB | Interest rate contracts | Other Assets [Member]
Derivatives and Hedging Activities
Asset	1,585		1,484
Derivatives not designated as hedging instruments | GMWB and GMAB | Interest rate contracts | Other Liabilities [Member]
Derivatives and Hedging Activities
Liability	1,306		1,672
Derivatives not designated as hedging instruments | GMWB and GMAB | Equity derivatives | Other Assets [Member]
Derivatives and Hedging Activities
Asset	1,642		1,741
Derivatives not designated as hedging instruments | GMWB and GMAB | Equity derivatives | Other Liabilities [Member]
Derivatives and Hedging Activities
Liability	2,767		2,918
Derivatives not designated as hedging instruments | GMWB and GMAB | Credit contracts | Other Assets [Member]
Derivatives and Hedging Activities
Asset			3
Derivatives not designated as hedging instruments | GMWB and GMAB | Foreign exchange contracts | Other Assets [Member]
Derivatives and Hedging Activities
Asset	2		2
Derivatives not designated as hedging instruments | GMWB and GMAB | GMWB and GMAB Embedded Derivatives [Member] | Policyholder Account Balances, Future Policy Benefits and Claims [Member]
Derivatives and Hedging Activities
Liability	(347)	[1],[2]	(575)	[1],[2]
Derivatives not designated as hedging instruments | Equity Indexed Annuities Embedded Derivatives [Member] | Equity derivatives | Policyholder Account Balances, Future Policy Benefits and Claims [Member]
Derivatives and Hedging Activities
Liability	5		5
Derivatives not designated as hedging instruments | Indexed Universal Life [Member] | Equity derivatives | Other Assets [Member]
Derivatives and Hedging Activities
Asset	33		27
Derivatives not designated as hedging instruments | Indexed Universal Life [Member] | Equity derivatives | Other Liabilities [Member]
Derivatives and Hedging Activities
Liability	11		13
Derivatives not designated as hedging instruments | IUL embedded derivatives | Equity derivatives | Policyholder Account Balances, Future Policy Benefits and Claims [Member]
Derivatives and Hedging Activities
Liability	184		125
Derivatives not designated as hedging instruments | Macro hedge program [Member] | Other Contract [Member] | Other Assets [Member]
Derivatives and Hedging Activities
Asset	1		4
Derivatives not designated as hedging instruments | Macro hedge program [Member] | Other Contract [Member] | Other Liabilities [Member]
Derivatives and Hedging Activities
Liability	13		29
Derivatives not designated as hedging instruments | Other Derivatives [Member]
Derivatives and Hedging Activities
Asset	34		31
Liability	$ 213		$ 172

[1] The fair values of GMWB and GMAB embedded derivatives fluctuate based on changes in equity, interest rate and credit markets.

[2] The fair value of the GMWB and GMAB embedded derivatives was a net asset at June 30, 2014 and December 31, 2013 and the amount is reported as a contra liability.