Income Taxes - Unrecognized Tax Benefits and Effect on Effective Income Tax Rate (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
Unrecognized Tax Benefits [Line Items]
Unrecognized tax benefits, Beginning balance, Gross	$ 254.5
Additions relating to the acquisition of Diversey, Gross	15.5
Additions for tax positions of current year, Gross	23.5
Additions for tax positions of prior years, Gross	2.9
Reductions for tax positions of prior years, Gross	(63.2)
Unrecognized tax benefits, Ending balance, Gross	233.2
Unrecognized tax benefits, Beginning balance, Net	246.7
Additions relating to acquisition of Diversey, Net	12.5
Additions for tax positions of current year, Net	23.5
Additions for tax positions of prior years, Net	2.5
Reductions for tax positions of prior years, Net	(55.7)
Unrecognized tax benefits, Ending balance, Net	$ 229.5