Acquisition of Assets - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended												12 Months Ended				1 Months Ended	12 Months Ended		12 Months Ended		12 Months Ended											3 Months Ended	12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 Fair Value Adjustment to Inventory	Sep. 26, 2012 2.875% Senior notes due October 1, 2022	Dec. 31, 2012 2.875% Senior notes due October 1, 2022	Dec. 31, 2011 2.875% Senior notes due October 1, 2022	Dec. 31, 2011 Oral Care Technology Two	Nov. 08, 2011 Oral Care Technology Two	Dec. 31, 2011 Oral Care Technology Two Minimum	Dec. 31, 2011 Oral Care Technology Two Maximum	Dec. 31, 2010 Oral Care Technology One	Dec. 31, 2010 Oral Care Technology One Minimum	Dec. 31, 2010 Oral Care Technology One Maximum	Dec. 31, 2012 Avid Health, Inc	Jun. 30, 2012 Avid Health, Inc	Dec. 31, 2011 Avid Health, Inc	Dec. 31, 2012 Avid Health, Inc Maximum	Dec. 31, 2011 Avid Health, Inc Maximum	Dec. 31, 2010 Avid Health, Inc Maximum	Dec. 31, 2012 Avid Health, Inc Business Acquisitions	Dec. 31, 2012 Avid Health, Inc Business Acquisitions	Dec. 31, 2011 Batiste	Dec. 31, 2010 Feline Pine	Dec. 31, 2010 Simply Saline
Business Acquisition [Line Items]
Purchase price	$ 652.3				$ 69.1				$ 126.0				$ 652.3	$ 69.1	$ 126.0												$ 652.3
Proceed from issuance of senior notes																		400.0	0
Interest rate of debt																	2.875%	2.875%
Maturity date of debt																	Oct. 01, 2022	Oct. 01, 2022
Date of business acquisition																				Nov. 08, 2011				Sep. 02, 2010			Oct. 01, 2012								Jun. 28, 2011	Dec. 21, 2010	Jun. 04, 2010
Approximate annual sales																												230.0							20.0	20.0	20.0
Cash consideration																				4.3	4.3			10.0											64.8	46.0	70.0
Weighted average life of the amortizable intangible assets, years																						7 years	10 years		7 years	10 years	15 years			10 years	10 years	10 years			15 years		15 years
Acquisition-related costs													4.4			7.6
Net Sales	809.7	725.2	696.4	690.6	731.1	701.0	674.9	642.3	656.9	656.9	640.9	634.5	2,921.9	2,749.3	2,589.2												2,921.9		2,749.3				70.0	70.0
Net Income													$ 349.8	$ 309.6	$ 270.7												$ 349.8		$ 309.6					$ 0