Other Noncurrent Liabilities - Other Noncurrent Liabilities (Detail) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Other Liabilities Disclosure [Abstract]
Reserve for uncertain tax positions	$ 49.8	$ 49.8
Asset retirement obligations	26.1	25.6
Employee benefits	12.2	12.2
Insurance claims and expenses	9.6	9.5
Deferred payment obligation	8.3	8.2
Deferred income	1.1	1.3
Other	3.5	3.6
Total	$ 110.6	$ 110.2