Information About Segments of Business Reconciliation of Assets from Segment to Consolidated (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012
Segment Reporting, Asset Reconciling Item
Assets	$ 16,534.4		$ 16,226.8
General Insurance Group [Member]
Segment Reporting, Asset Reconciling Item
Assets	13,276.6		12,770.2
Title Insurance Group [Member]
Segment Reporting, Asset Reconciling Item
Assets	1,185.5		1,076.5
RFIG Run-off Business [Member]
Segment Reporting, Asset Reconciling Item
Assets	1,822.3		2,051.1
Total of major segments [Member]
Segment Reporting, Asset Reconciling Item
Assets	16,284.5		15,897.9
All Other Segments [Member]
Segment Reporting, Asset Reconciling Item
Assets	549.8	[1]	626.2	[1]
Business Intersegment, Eliminations [Member]
Segment Reporting, Asset Reconciling Item
Assets	$ (299.9)		$ (297.3)

[1] Represents amounts for Old Republic's holding company parent, minor corporate services subsidiaries, and a small life and accident insurance operation.