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Investments (Details 5) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013
Net Investment Income [Line Items] |  |  |  |
Investment income | $ 380 | $ 336 | $ 746 | $ 666
Investment expenses | (1) | (4) | (6) | (8)
Net investment income | 379 | 332 | 740 | 658
Fixed maturities [Member] |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Investment income | 338 | 308 | 665 | 610
Equity securities [Member] |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Investment income | 16 | 9 | 32 | 21
Equity method investments [Member] |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Investment income | 7 | 0 | 13 | 0
Other [Member] |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Investment income | $ 19 | $ 19 | $ 36 | $ 35

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- Definition Amount, before investment expense, of income earned from investments in securities and real estate. Includes, but is not limited to, real estate investment, policy loans, dividends, and interest. Excludes realized gain (loss) on investments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.2) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 2 -Article 7 + Details
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- Definition Amount, after investment expense, of income earned from investments in securities and real estate. Includes, but is not limited to, real estate investment, policy loans, dividends, and interest. Excludes realized gain (loss) on investments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 16 -Article 12 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.2) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 2 -Article 7 + Details
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