Related Party Transactions (Schedule Of Related Party Transactions) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				12 Months Ended
	Mar. 31, 2012 T		Apr. 01, 2011		Dec. 31, 2011
Related Party Transaction [Line Items]
Initial investment of joint venture	$ 3.0		$ 0
Armand Products Company [Member]
Related Party Transaction [Line Items]
Percentage of ownership interest	50.00%
Purchases by Company	4.2		3.0
Sales by Company	0		0
Outstanding Accounts Receivable	0		0.3
Outstanding Accounts Payable	2.3		0.8
Administration & Management Oversight Services	0.4	[1]	0.4	[1]
ArmaKleen Company [Member]
Related Party Transaction [Line Items]
Percentage of ownership interest	50.00%
Purchases by Company	0		0
Sales by Company	0.3		1.4
Outstanding Accounts Receivable	0.6		0.8
Outstanding Accounts Payable	0		0
Administration & Management Oversight Services	0.6	[1]	0.6	[1]
Natronx LLC [Member]
Related Party Transaction [Line Items]
Percentage of ownership interest	33.33%
Purchases by Company	0		0
Sales by Company	0.7		0
Outstanding Accounts Receivable	0.2		0
Outstanding Accounts Payable	0		0
Administration & Management Oversight Services	0.2	[1]	0	[1]
Expected future investment in JV	60
Expected annual trona sorbents production, tons per year	450,000
Initial investment of joint venture	3.0				3.2
Additional committed investment in joint venture	$ 14

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