SCHEDULE V VALUATION AND QUALIFYING ACCOUNTS (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Reinsurance recoverable on paid losses: Allowance for reinsurance balances
VALUATION AND QUALIFYING ACCOUNTS
Balance at beginning of period	$ 35.5		$ 34.4		$ 29.4
Charged to costs and expenses	(0.6)		(0.6)		8.5
Charged to other accounts	0		0		0
Deductions described	(11.2)	[1]	1.7	[1]	(3.5)	[1]
Balance at end of period	23.7		35.5		34.4
Property and casualty insurance and reinsurance premiums receivable: Allowance for uncollectible accounts
VALUATION AND QUALIFYING ACCOUNTS
Balance at beginning of period	4.4		3.4		3.9
Charged to costs and expenses	1.0		1.1		0
Charged to other accounts	0		0		(0.5)
Deductions described	(1.4)	[1]	(0.1)	[1]	0	[1]
Balance at end of period	$ 4.0		$ 4.4		$ 3.4

[1] Represents net collections (charge-offs) of balances receivable and foreign currency translation.