Information About Segments of Business Reconciliation of Assets from Segment to Consolidated (Details) - USD ($) $ in Millions |
Dec. 31, 2015 |
Dec. 31, 2014 |
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Segment Reporting, Asset Reconciling Item | ||||
Assets | $ 17,110.5 | $ 16,988.1 | ||
General Insurance Group [Member] | ||||
Segment Reporting, Asset Reconciling Item | ||||
Assets | 14,523.0 | 14,251.8 | ||
Title Insurance Group [Member] | ||||
Segment Reporting, Asset Reconciling Item | ||||
Assets | 1,314.3 | 1,243.0 | ||
RFIG Run-off Business [Member] | ||||
Segment Reporting, Asset Reconciling Item | ||||
Assets | 978.7 | 1,108.4 | ||
Total of major segments [Member] | ||||
Segment Reporting, Asset Reconciling Item | ||||
Assets | 16,816.1 | 16,603.3 | ||
All Other Segments [Member] | ||||
Segment Reporting, Asset Reconciling Item | ||||
Assets | [1] | 769.4 | 833.9 | |
Business Intersegment, Eliminations [Member] | ||||
Segment Reporting, Asset Reconciling Item | ||||
Assets | $ (475.0) | $ (449.1) | ||
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