Other Noncurrent Liabilities - Other Noncurrent Liabilities (Detail) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Other Noncurrent Liabilities [Line Items]
Reserve for uncertain tax positions	$ 33.6	$ 32.9
Asset retirement obligations	29.3	28.8
Deferred income	17.9	20.2
Employee benefits	7.3	7.1
Insurance claims and expenses	9.6	9.6
Deferred payment obligation	8.8	8.8
Other	7.1	7.0
Total, Other noncurrent liabilities	118.2	114.6
Interest Rate Swap
Other Noncurrent Liabilities [Line Items]
Hedging liabilities	$ 4.6	$ 0.2