Prepaid Expenses and Other - Schedule of Prepaid and Other Expenses (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Other Assets [Abstract]
Prepaid expenses	$ 22.5	$ 20.7
Other	38.9	25.0
Total prepaid and other expenses	$ 61.4	$ 45.7