Summary of Restructuring and Impairment Costs (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended								3 Months Ended
	Sep. 28, 2014	Jun. 29, 2014	Mar. 30, 2014	Mar. 30, 2014 2011 Infrastructure Realignment Program Employee Separation Costs	Mar. 30, 2014 2012 Infrastructure Realignment Program Employee Separation Costs	Sep. 28, 2014 2012 Infrastructure Realignment Program Lease Termination Costs	Mar. 30, 2014 2012 Infrastructure Realignment Program Lease Termination Costs	Dec. 29, 2013 2012 Infrastructure Realignment Program Lease Termination Costs	Sep. 28, 2014 2013 Infrastructure Realignment Program Employee Separation Costs	Jun. 29, 2014 2013 Infrastructure Realignment Program Employee Separation Costs	Mar. 30, 2014 2013 Infrastructure Realignment Program Employee Separation Costs	Sep. 28, 2014 2013 Infrastructure Realignment Program Lease Termination Costs	Jun. 29, 2014 2013 Infrastructure Realignment Program Lease Termination Costs	Mar. 30, 2014 2013 Infrastructure Realignment Program Lease Termination Costs	Mar. 30, 2014 2013 Infrastructure Realignment Program Asset Impairments costs	Sep. 28, 2014 2013 Infrastructure Realignment Program Line closure costs	Jun. 29, 2014 2013 Infrastructure Realignment Program Line closure costs	Mar. 30, 2014 2013 Infrastructure Realignment Program Line closure costs	Sep. 28, 2014 2014 Infrastructure Realignment Program Employee Separation Costs	Jun. 29, 2014 2014 Infrastructure Realignment Program Employee Separation Costs	Mar. 30, 2014 2014 Infrastructure Realignment Program Employee Separation Costs	Sep. 28, 2014 2014 Infrastructure Realignment Program Asset Impairments costs	Mar. 30, 2014 2014 Infrastructure Realignment Program Asset Impairments costs	Sep. 28, 2014 2014 Infrastructure Realignment Program Qualification Cost	Jun. 29, 2014 2014 Infrastructure Realignment Program Qualification Cost	Mar. 30, 2014 2014 Infrastructure Realignment Program Qualification Cost
Restructuring Cost and Reserve [Line Items]
Accrual Balance, Beginning balance	$ 2.0	$ 3.3	$ 4.2	$ 0.3	$ 0.2	$ 0.1	$ 0.1	$ 0.1	$ 0.3	$ 1.1	$ 3.2	$ 0.1	$ 0.1	$ 0.4					$ 1.5	$ 2.0
Restructuring Charges	29.8	2.9	4.7							0.5	0.4		0.1		0.5	0.5	0.8	0.9	28.4	1.5	2.8	0.9	0.1
Other Charges	2.2	1.9	1.9																					2.2	1.9	1.9
Reserve Release	(0.3)	(0.1)	(0.5)	(0.2)					(0.2)	(0.1)	(0.1)			(0.2)					(0.1)
Cash Paid	(3.7)	(6.0)	(6.4)	(0.1)	(0.2)	(0.1)			(0.1)	(1.2)	(2.4)	(0.1)	(0.1)	(0.1)		(0.5)	(0.8)	(0.9)	(1.5)	(2.0)	(0.8)			(1.4)	(1.9)	(1.9)
Non-Cash Items	(0.9)		(0.6)												(0.5)							(0.9)	(0.1)
Accrual Balance, Ending balance	$ 29.1	$ 2.0	$ 3.3				$ 0.1	$ 0.1		$ 0.3	$ 1.1		$ 0.1	$ 0.1					$ 28.3	$ 1.5	$ 2.0			$ 0.8