Re-engineering Costs (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2011	Oct. 01, 2011	Jul. 02, 2011	Apr. 02, 2011	Dec. 25, 2010	Sep. 25, 2010	Jun. 26, 2010	Mar. 27, 2010	Dec. 31, 2011		Dec. 25, 2010		Dec. 26, 2009
Restructuring Cost and Reserve [Line Items]
Severance									$ 5.9		$ 6.5		$ 5.2
Asset impairment/facility moving costs									2.0		1.1		2.8
Total re-engineering and impairment charges	3.2	2.2	1.1	1.4	3.6	0.4	2.0	1.6	7.9	[1]	7.6	[1]	8.0	[1]
Total pretax re-engineering costs									9.6		7.6		8.0
Restructuring Reserve [Roll Forward]
Beginning of the year balance				2.4				1.5	2.4		1.5		2.2
Cash expenditures:
Non-cash asset impairments									(0.5)		(0.1)		(2.1)
End of period balance	3.0				2.4				3.0		2.4		1.5
Software and Property, Plant and Equipment [Member]
Restructuring Cost and Reserve [Line Items]
Asset impairment/facility moving costs													2.1
Relocation of Certain Manufacturing Facilities [Member]
Restructuring Cost and Reserve [Line Items]
Asset impairment/facility moving costs													0.7
Re-engineering and Impairment Charges [Member]
Restructuring Cost and Reserve [Line Items]
Total re-engineering and impairment charges									7.9		7.6		8.0
Cost of products sold [Member]
Restructuring Cost and Reserve [Line Items]
Total re-engineering and impairment charges									1.7		0		0
Severance [Member]
Cash expenditures:
Cash expenditures									5.7		5.5		5.4
Other [Member]
Cash expenditures:
Cash expenditures									1.1		1.1		1.2
Nutrimetics Malaysia [Member]
Restructuring Cost and Reserve [Line Items]
Severance									1.3
Asset impairment/facility moving costs									$ 0.7

[1] The re-engineering and impairment charges line provides for severance and other exit costs. See Note 2 to the Consolidated Financial Statements.