Other Noncurrent Liabilities - Other Noncurrent Liabilities (Detail) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Other Liabilities Disclosure [Abstract]
Reserve for uncertain tax positions	$ 32.7	$ 49.8
Asset retirement obligations	27.0	25.6
Employee benefits	11.1	12.2
Insurance claims and expenses	9.9	9.5
Deferred payment obligation	8.4	8.2
Deferred income	0.9	1.3
Other	3.4	3.6
Total	$ 93.4	$ 110.2