Commitments, Contingencies and Guarantees - Additional Information (Detail) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2013 USD ($) T	Dec. 31, 2010 USD ($)	Dec. 31, 2009 USD ($)	Dec. 31, 2010 BRL	Mar. 31, 2013 Collateralized Debt Obligations USD ($)	Mar. 31, 2013 Financial Guarantee USD ($)	Mar. 31, 2013 Oral Care Technology USD ($)	Nov. 08, 2011 Oral Care Technology USD ($)	Nov. 08, 2011 Oral Care Technology Collateralized Debt Obligations USD ($)
Long-term Purchase Commitment [Line Items]
Annual purchase commitment, in tons	240,000
Commitments	$ 221.2
Commitments, expiration year	2017
Outstanding letters of credit	5.1
Guarantees					3.7	17.8			5.5
Cash consideration								4.3
Potential license payment								7
Advance royalty payments							3.0
Imposition of fine		2.5		5.0
Remediation and related costs		4.8	3.0
Remediation activities	2.6
Cost of landfill removal, minimum	30
Cost of landfill removal, maximum	50
Total reasonably possible decrease in liabilities for uncertain income tax positions	9.1
Reasonably possible decrease in liabilities for uncertain income tax positions	(3.1)
Reasonably possible change in other uncertain tax positions	$ 0.1