Schedule III - Supplementary Insurance Information (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Supplementary Insurance Information, by Segment
Deferred Policy Acquisition Costs	$ 192.6		$ 165.5		$ 197.6
Losses, Claims and Settlement Expenses	9,433.5		9,303.3		8,786.6
Unearned Premiums	1,487.8		1,364.4		1,268.8
Other Policyholders' Benefits and Funds	207.8		201.8		193.1
Premium Revenue	4,456.6		4,043.8		3,695.5
Net Investment Income	318.7		336.5		364.6
Benefits, Claims, Losses and Settlement Expenses	2,238.3		2,765.3		2,764.3
Amortization of Deferred Policy Acquisition Costs	331.9		343.2		371.8
Other Operating Expenses	2,199.4		1,990.1		1,745.9
Premiums Written	4,533.6		4,065.5		3,742.0
Reinsurance Recoverables Policy And Claim Reserves	3,150.8		3,133.3		3,143.1
General Insurance Segment [Member]
Supplementary Insurance Information, by Segment
Deferred Policy Acquisition Costs	170.4		139.4		168.6
Losses, Claims and Settlement Expenses	4,334.1		4,048.9		3,874.9
Unearned Premiums	1,174.2		1,068.8		1,009.2
Other Policyholders' Benefits and Funds	116.9		107.7		96.9
Premium Revenue	2,513.7		2,324.4		2,109.4
Net Investment Income	249.6		264.9		270.5
Benefits, Claims, Losses and Settlement Expenses	1,849.4		1,696.0		1,460.0
Amortization of Deferred Policy Acquisition Costs	315.4		327.9		296.7
Other Operating Expenses	396.3		414.4		374.6
Premiums Written	2,601.1		2,366.9		2,137.6
Title Insurance Group [Member]
Supplementary Insurance Information, by Segment
Deferred Policy Acquisition Costs	0		0		0
Losses, Claims and Settlement Expenses	471.5		396.4		332.0
Unearned Premiums	0		0		0
Other Policyholders' Benefits and Funds	6.5		7.0		6.1
Premium Revenue	1,567.1		1,250.2		1,007.9
Net Investment Income	26.6		27.3		27.3
Benefits, Claims, Losses and Settlement Expenses	134.0		120.8		105.7
Amortization of Deferred Policy Acquisition Costs	0		0		0
Other Operating Expenses	1,767.2		1,512.3		1,249.8
Premiums Written	1,567.1		1,250.2		1,007.9
RFIG Run-off Business [Member]
Supplementary Insurance Information, by Segment
Deferred Policy Acquisition Costs	0		0		0
Losses, Claims and Settlement Expenses	1,774.2		1,994.8		1,654.0
Unearned Premiums	28.8		40.5		57.6
Other Policyholders' Benefits and Funds	0		0		0
Premium Revenue	316.5		410.5		503.2
Net Investment Income	36.8		36.3		59.3
Benefits, Claims, Losses and Settlement Expenses	217.7		910.4		1,160.1
Amortization of Deferred Policy Acquisition Costs	0		0		52.3
Other Operating Expenses	25.5		45.4		83.2
Premiums Written	304.3		389.8		521.2
Corporate & Other [Member]
Supplementary Insurance Information, by Segment
Deferred Policy Acquisition Costs	22.2	[1]	26.0	[1]	29.0	[1]
Losses, Claims and Settlement Expenses	16.8	[1]	15.9	[1]	17.4	[1]
Unearned Premiums	0	[1]	0	[1]	0	[1]
Other Policyholders' Benefits and Funds	54.8	[1]	55.7	[1]	56.9	[1]
Premium Revenue	59.3	[1]	58.6	[1]	74.9	[1]
Net Investment Income	5.6	[1]	7.9	[1]	7.4	[1]
Benefits, Claims, Losses and Settlement Expenses	37.0	[1]	38.0	[1]	38.5	[1]
Amortization of Deferred Policy Acquisition Costs	16.4	[1]	15.3	[1]	22.7	[1]
Other Operating Expenses	9.9	[1]	17.8	[1]	38.2	[1]
Premiums Written	61.0	[1]	58.5	[1]	75.1	[1]
Reinsurance Recoverable [Member]
Supplementary Insurance Information, by Segment
Deferred Policy Acquisition Costs	0	[2]	0	[2]	0	[2]
Losses, Claims and Settlement Expenses	2,836.7	[2]	2,847.0	[2]	2,908.1	[2]
Unearned Premiums	284.7	[2]	255.1	[2]	201.9	[2]
Other Policyholders' Benefits and Funds	29.3	[2]	31.2	[2]	33.0	[2]
Premium Revenue	0	[2]	0	[2]	0	[2]
Net Investment Income	0	[2]	0	[2]	0	[2]
Benefits, Claims, Losses and Settlement Expenses	0	[2]	0	[2]	0	[2]
Amortization of Deferred Policy Acquisition Costs	0	[2]	0	[2]	0	[2]
Other Operating Expenses	0	[2]	0	[2]	0	[2]
Premiums Written	$ 0	[2]	$ 0	[2]	$ 0	[2]

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

[2] In accordance with GAAP, reinsured losses and unearned premiums are to be reported as assets. Assets and liabilities were, as a result, increased by corresponding amounts of approximately $3.1 billion at December 31, 2013, 2012 and 2011. This accounting treatment does not have any effect on the Company's results of operations.