Acquisitions (Narrative) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended					1 Months Ended	12 Months Ended	3 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 Umeco [Member]	Jul. 20, 2012 Umeco [Member]	Jul. 20, 2012 Umeco Plc [Member]	Dec. 31, 2012 Legacy Umeco [Member]	Mar. 31, 2012 SOIL [Member]	Mar. 30, 2012 SOIL [Member]	Mar. 30, 2012 SOIL [Member] Maximum [Member]	Mar. 30, 2012 SOIL [Member] Minimum [Member]
Business Acquisition [Line Items]
Total purchase price														$ 423.8			$ 30.2
Amount from existing revolving credit facility drawn														170.0
Revolving credit facility	400.0								400.0
Goodwill												184.4	184.4
The estimated amount of goodwill deductible for tax purposes												7.1
Period of goodwill deductible for tax purposes												5 years
The estimated amount of goodwill non-deductible for tax purposes												177.3
Estimated net step-up in fair value for finished goods												5.6
Estimated step-up in fair value for property and equipment													4.9
Fair value of acquired trade receivables												65.2
Acquisition related costs												8.4
Net sales	470.7	455.4	404.0	378.1	369.5	363.4	347.3	335.7	1,708.1	1,415.9	1,223.4	150.0
Net earnings									163.6	155.5	113.5	1.0
Amortization of purchased finished goods												5.6
Removal of costs related to the acquisition												20.2			11.8
Date of acquisitions																Mar. 30, 2012
Net amount payable to SOIL																		$ 7.5	$ 1.0