Summary of Values of Assets Acquired and Liabilities Assumed - Pinnacle assets (Detail) (USD $) In Millions, unless otherwise specified			1 Months Ended
	Jun. 30, 2012	Dec. 31, 2011	May 31, 2012 Pinnacle Assets
Business Acquisition [Line Items]
Accounts receivable			$ 21.9
Inventory			21.9
Other current assets			0.7
Property, plant and equipment			11.0
Intangible assets (tradenames) (Note 10)			156.0
Other liabilities			(16.6)
Total identifiable assets			194.9
Goodwill	2,544.7	2,103.9	413.2
Net assets acquired			$ 608.1