Investments (Troubled Debt Restructurings) (Details) (Commercial Mortgage Loan [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012
Commercial Mortgage Loan [Member]
Pre Modification:
Commercial Mortgage and Other Loans Modifications Pre Modification Recorded Investment	$ 0	$ 5
Post Modification:
Commercial Mortgage and Other Loans Modifications Post Modification Recorded Investment	$ 0	$ 5

Post-modification amount of investment in financing receivables modified by troubled debt restructurings.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 33

-URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953676-111524

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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