Balance and Transactions Between Company (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Armand Products Company
Related Party Transaction [Line Items]
Purchases by Company	$ 21.3		$ 19.6		$ 13.8
Sales by Company	0		0		0
Outstanding Accounts Receivable	0.1		0.3		0.3
Outstanding Accounts Payable	1.8		2.3		0.9
Administration & Management Oversight Services	1.7	[1]	1.7	[1]	1.7	[1]
Armakleen Company
Related Party Transaction [Line Items]
Purchases by Company	0		0		0
Sales by Company	5.5		5.5		5.5
Outstanding Accounts Receivable	0.4		0.7		0.5
Outstanding Accounts Payable	0		0		0
Administration & Management Oversight Services	1.7	[1]	2.5	[1]	2.5	[1]
Natronx LLC
Related Party Transaction [Line Items]
Purchases by Company	0		0		0
Sales by Company	2.4		0		0
Outstanding Accounts Receivable	0		0		0
Outstanding Accounts Payable	0		0		0
Administration & Management Oversight Services	$ 0.9	[1]	$ 0.7	[1]	$ 0	[1]

[1] Billed by Company and recorded as a reduction of selling, general and administrative expenses.