Variable Annuity and Insurance Guarantees (Separate account balance by type) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Mutual funds
Variable Annuity and Insurance Guarantees
Total mutual funds	$ 71,547	$ 69,478
Equity
Variable Annuity and Insurance Guarantees
Total mutual funds	40,724	39,195
Bond
Variable Annuity and Insurance Guarantees
Total mutual funds	25,965	26,519
Other
Variable Annuity and Insurance Guarantees
Total mutual funds	$ 4,858	$ 3,764

Fair value amount of the specified investment category of assets maintained in separate accounts as of the balance sheet date.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 20

-Section 55

-Paragraph 15

-URI http://asc.fasb.org/extlink&oid=6588021&loc=d3e7104-158389

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 80

-Section 50

-Paragraph 1

-Subparagraph (e)

-URI http://asc.fasb.org/extlink&oid=6484115&loc=d3e19393-158473

Name:	us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant