Summary Of Interest Expense (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Debt Instrument [Line Items]
Interest incurred	$ 276.0	$ 271.1	$ 259.8
Less: interest income	(11.5)	(15.2)	(13.6)
Less: interest capitalized as property, plant and equipment	(3.1)	(4.1)	(2.9)
Interest expense, net	$ 261.4	$ 251.8	$ 243.3