Restatement Of Condensed Consolidated Financial Statements (Narrative) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Dec. 31, 2011	Dec. 31, 2010
Overstatement of consolidated sales		$ 5.5
Overstatement of accounts receivable		16.3
Decrease in current deferred income taxes	3.9
Additional valuation allowance	14.2
Increase in goodwill	3.9	4.0
Unrecognized impairment of property, plant and equipment	2.7	2.7
Increase in inventories		9.5
Understatement of trade payable		10.1
Adjustments for marketing costs payable		8.5
Understatement of other accrued liabilities		7.2
Decrease in cost of goods sold		11.7
Retroactive Trade Rebates [Member]
Overstatement of consolidated sales		9.8	29.6	11.3
Overstatement of accounts receivable	48.4	20.7	44.5
Decrease in current deferred income taxes	8.6
Promotional Compensation [Member]
Overstatement of accounts receivable	7.8	7.7	8.1
Overstatement of consolidated sales, net	1.6	2.8
Accounts Receivable [Member]
Cut off error		14.1
Revenue [Member]
Cut off error		11.9
Cost of Sales [Member]
Cut off error		$ 10.3