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Summary of Components of Interest as Presented in Consolidated Statements of Operations (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Debt Instrument [Line Items]
Income	$ 5.5	$ 5.2	$ 5.3
Expense on borrowings	(92.3)	(73.8)	(65.5)
UTBs and other tax related interest	(8.6)	0.4	(8.7)
Legacy Tax	3.6	4.4	3.7
Interest capitalized	0	0	3.1
Total	(91.8)	(63.8)	(62.1)
Interest paid	$ 81.9	$ 94.4	$ 67.2

This element represents interest expense recognized for an underpayment of income taxes computed by applying the applicable statutory rate of interest to the difference between a tax position recognized for financial reporting purposes and the amount previously taken or expected to be taken in a tax return of the entity.

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