Balance and Transactions Between Company (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Armand Products Company
Related Party Transaction [Line Items]
Purchases by Company	$ 4.3		$ 4.2
Sales by Company	0		0
Outstanding Accounts Receivable	1.3		0
Outstanding Accounts Payable	0		2.3
Administration & Management Oversight Services	0.4	[1]	0.4	[1]
Armakleen Company
Related Party Transaction [Line Items]
Purchases by Company	0		0
Sales by Company	0.3		0.3
Outstanding Accounts Receivable	1.3		0.6
Outstanding Accounts Payable	0		0
Administration & Management Oversight Services	0.5	[1]	0.6	[1]
Natronx LLC
Related Party Transaction [Line Items]
Purchases by Company	0		0
Sales by Company	0.4		0.7
Outstanding Accounts Receivable	0.5		0.2
Outstanding Accounts Payable	0		0
Administration & Management Oversight Services	$ 0.3	[1]	$ 0.2	[1]

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