Investments (Analysis of Past Due Commercial Mortgage and Other Loans) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
Commercial Mortgage Loan [Member]
Current	$ 1,400,000,000	$ 1,400,000,000
Commercial Loan on Other [Member]
Total Past Due	$ 6,400,000	$ 6,400,000

Recorded Investment in financing receivables that are past due at the balance sheet date.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 7A

-URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953401-111524

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant