| **Valuation And Qualifying Accounts**            | 12 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
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| **Valuation and Qualifying Accounts [Abstract]** |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
| Valuation And Qualifying Accounts                | Schedule VCincinnati Financial Corporation and SubsidiariesValuation and Qualifying Accounts(In millions) At December 31,  2013 2012 2011Allowance for doubtful receivables:      Balance at beginning of year $2 $2 $3Additions charged to costs and expenses 1 1 2Deductions (1) (1) (3)Balance at end of year $2 $2 $2        |

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| - Definition
The entire disclosure for any allowance and reserve accounts (their beginning and ending balances, as well as a reconciliation by type of activity during the period). Alternatively, disclosure of the required information may be within the footnotes to the financial statements or a supplemental schedule to the financial statements.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 09 -Article 12
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| - Details**Name:**us-gaap_ValuationAndQualifyingAccountsAbstract**Namespace Prefix:**us-gaap_**Data Type:**xbrli:stringItemType**Balance Type:**na**Period Type:**duration |