Schedule II - Valuation and Qualifying Accounts - Disclosure Table (Detail) (Allowance for Doubtful Accounts, USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Allowance for Doubtful Accounts
Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning balance	$ 58.7		$ 14.0		$ 16.0
Additions charged to costs and expenses	(1.2)		49.7		1.6
Deductions	11.5	[1]	2.4	[1]	4.0	[1]
Other changes	(3.5)	[2]	(2.6)	[2]	0.4	[2]
Ending balance	$ 42.5		$ 58.7		$ 14.0

[1] Uncollectible accounts written off, net of recoveries

[2] Result of foreign currency effects