Restatement Of Consolidated Financial Statements (Narrative) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended			6 Months Ended		3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended	12 Months Ended		3 Months Ended	6 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011	Jun. 30, 2011 Accounts Receivable [Member]	Jun. 30, 2011 Inventory [Member]	Jun. 30, 2011 Sales [Member]	Jun. 30, 2011 Sales [Member]	Jun. 30, 2011 Cost Of Goods Sold [Member]	Jun. 30, 2011 Cost Of Goods Sold [Member]	Jun. 30, 2011 Retroactive Trade Rebates [Member]	Jun. 30, 2011 Retroactive Trade Rebates [Member]	Dec. 31, 2011 Retroactive Trade Rebates [Member]	Dec. 31, 2010 Retroactive Trade Rebates [Member]	Jun. 30, 2011 Promotional Compensation [Member]	Jun. 30, 2011 Promotional Compensation [Member]	Dec. 31, 2011 Promotional Compensation [Member]	Jun. 30, 2011 Promotional Compensation [Member] Accounts Receivable [Member]
Overstatement of consolidated sales	$ 0	$ 6.7	$ 0	$ 12.2										$ 29.6	$ 11.3	$ 3.7	$ 6.5
Overstatement of accounts receivable		29.2		29.2	44.5											8.0	8.0	8.1
Overstatement of selling, general and administrative expenses																3.3	4.2
Decrease in accounts receivable				23.2									29.2						8.0
Cut-off error						18.1	13.2	3.3	15.2	2.9	13.2
Increased in inventories							12.8
Decreased taxes other than income taxes payable				2.5
Increase in goodwill				4.0
Unrecognized impairment of property, plant and equipment				2.7
Decrease in sales		3.8		13.5								6.7	12.2			3.7	6.5
Decrease in cost of goods sold		$ 3.0		$ 14.7