Summary of Components of Interest as Presented in Consolidated Statements of Operations (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Debt Instrument [Line Items]
Income	$ 2.9	$ 1.9
Expense on borrowings	(34.6)	(28.3)
Income (expense) on UTPs and other tax related liabilities	(2.8)	(3.2)
Capitalized	0.4	0.3
Total	$ (34.1)	$ (29.3)