Restructuring and Related Charges (Details) $ in Millions	3 Months Ended				6 Months Ended		18 Months Ended
	Dec. 31, 2016 USD ($) employee	Jul. 02, 2016 USD ($) employee	Jan. 02, 2016 USD ($) employee	Mar. 29, 2014 employee	Dec. 31, 2016 USD ($)	Jan. 02, 2016 USD ($)	Apr. 02, 2016 employee	Sep. 27, 2014 company
Summary of various restructuring plans
Accrual balance at the beginning of the period					$ 18.0
Restructuring Charges (Benefits)	$ 1.8		$ 1.4		1.8	$ 1.8
Cash Settlements					(10.3)
Non-cash Settlements and Other Adjustments					(0.1)
Accrual balance at the end of the period	9.4	$ 18.0			9.4
Long-term restructuring accrual	3.3	4.7			3.3
Number of new public entities (in company) | company								2
Focused NSE Restructuring Plan
Summary of various restructuring plans
Accrual balance at the beginning of the period					0.0
Restructuring Charges (Benefits)	1.4				1.4
Cash Settlements					0.0
Non-cash Settlements and Other Adjustments					0.0
Accrual balance at the end of the period	$ 1.4	0.0			1.4
Number of employees impacted (employee) | employee	2
Other Plan
Summary of various restructuring plans
Accrual balance at the beginning of the period					0.0
Restructuring Charges (Benefits)	$ 0.4				0.4
Cash Settlements					(0.4)
Non-cash Settlements and Other Adjustments					0.0
Accrual balance at the end of the period	0.0	0.0			0.0
NE, SE and Shared Services Agile Restructuring Plan
Summary of various restructuring plans
Accrual balance at the beginning of the period					8.6
Restructuring Charges (Benefits)	0.0				0.1
Cash Settlements					(7.3)
Non-cash Settlements and Other Adjustments					0.0
Accrual balance at the end of the period	1.4	$ 8.6			1.4
Number of employees impacted (employee) | employee		180
NE and SE Agile Restructuring Plan
Summary of various restructuring plans
Accrual balance at the beginning of the period					0.8
Restructuring Charges (Benefits)	0.0				0.0
Cash Settlements					(0.3)
Non-cash Settlements and Other Adjustments					0.0
Accrual balance at the end of the period	0.5	$ 0.8			0.5
Number of employees impacted (employee) | employee			40
NE, SE, and Shared Separation Restructuring Plan
Summary of various restructuring plans
Accrual balance at the beginning of the period					1.4
Restructuring Charges (Benefits)	0.0				(0.2)
Cash Settlements					(0.9)
Non-cash Settlements and Other Adjustments					0.0
Accrual balance at the end of the period	0.3	1.4			0.3
Number of employees impacted (employee) | employee							330
Contractual obligations under the operating lease, net of sublease income, fair value	0.1				0.1
Plans Prior to Fiscal 2015
Summary of various restructuring plans
Accrual balance at the end of the period	1.3				1.3
NE Product Strategy Restructuring Plan
Summary of various restructuring plans
Accrual balance at the beginning of the period					1.5
Restructuring Charges (Benefits)	0.0				0.0
Cash Settlements					(0.2)
Non-cash Settlements and Other Adjustments					(0.1)
Accrual balance at the end of the period	1.2	1.5			1.2
Number of employees impacted (employee) | employee				60
NE Lease Restructuring Plan
Summary of various restructuring plans
Accrual balance at the beginning of the period					4.0
Restructuring Charges (Benefits)	0.0				0.1
Cash Settlements					(0.8)
Non-cash Settlements and Other Adjustments					0.0
Accrual balance at the end of the period	3.3	4.0			3.3
Contractual obligations under the operating lease, net of sublease income, fair value	3.3				3.3
Other Plans
Summary of various restructuring plans
Accrual balance at the beginning of the period					1.7
Restructuring Charges (Benefits)	0.0				0.0
Cash Settlements					(0.4)
Non-cash Settlements and Other Adjustments					0.0
Accrual balance at the end of the period	$ 1.3	$ 1.7			$ 1.3