Closed Block (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Closed Block [Line Items]
Closed Block Liabilities, Policyholder Dividend Obligation	$ 4,511	$ 6,363	$ 4,609
Dividends to policyholders'	1,910	2,021	2,571
December 2013 Board Of Directors Action [Member]
Closed Block [Line Items]
Dividends to policyholders'	33
Excess Of Actual Cumulative Earnings Over Expected Cumulative Earnings [Member]
Closed Block [Line Items]
Closed Block Liabilities, Policyholder Dividend Obligation	887	885
Accumulated Net Unrealized Investment Gains That Have Arisen Subsequent To Establishment Of Closed Block [Member]
Closed Block [Line Items]
Closed Block Liabilities, Policyholder Dividend Obligation	$ 3,624	$ 5,478

The liability as of the balance sheet date for the excess of the cumulative actual closed block earnings over the cumulative expected (actuarially determined) closed block earnings (each) for the period from the actuarial calculation date to the date of measurement. The excess will result in future dividends to closed block policyholders, unless offset by less favorable than expected future performance of the closed block. The policyholder dividend obligation, which may not have a negative balance, recognizes that a portion of earnings in certain cases will not inure to the stockholders of the insurance entity.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 805

-Section 55

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=6588659&loc=d3e31071-158570

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 805

-Section 50

-Paragraph 3

-Subparagraph (b)(3)

-URI http://asc.fasb.org/extlink&oid=6487222&loc=d3e30806-158569

Name:	us-gaap_ClosedBlockLiabilitiesPolicyholderDividendObligation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant