Schedule V Valuation and Qualifying Accounts (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Allowance for Loan and Lease Losses, Real Estate
Valuation and Qualifying Accounts Disclosure
Balance at Beginning of Period	$ 1.8		$ 0.3		$ 0.3
Additions Charged to Costs and Expenses	0.4		1.5		0
Additions Charged to Other Accounts	0	[1]	0	[1]	0	[1]
Deductions	1.9	[2]	0	[2]	0	[2]
Balance at End of Period	0.3		1.8		0.3
Allowance for Doubtful Accounts
Valuation and Qualifying Accounts Disclosure
Balance at Beginning of Period	5.6		6.2		5.7
Additions Charged to Costs and Expenses	1.4		0.7		0.9
Additions Charged to Other Accounts	0.3	[1]	0	[1]	0	[1]
Deductions	0.9	[2]	1.3	[2]	0.4	[2]
Balance at End of Period	$ 6.4		$ 5.6		$ 6.2

[1] Additions charged to other accounts are comprised of amounts related to fluctuations in the foreign currency exchange rate.

[2] Deductions include amounts deemed to reduce exposure of probable losses and amounts deemed uncollectible.