Business Combinations, Goodwill and Acquired Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Millions		9 Months Ended
	Mar. 28, 2017	Oct. 01, 2017	Jan. 01, 2017
Business Acquisition [Line Items]
Goodwill		$ 1,748.9	$ 1,193.5
e2v
Business Acquisition [Line Items]
Total intangibles subject to amortization	$ 126.6	$ 173.4
Weighted average useful life in years	11 years 9 months
Total acquired intangible assets	$ 173.4
Goodwill	471.1
Trademarks | e2v
Business Acquisition [Line Items]
Intangibles not subject to amortization	46.8
Proprietary technology | e2v
Business Acquisition [Line Items]
Total intangibles subject to amortization	$ 97.5
Weighted average useful life in years	11 years 9 months
Customer list/relationships | e2v
Business Acquisition [Line Items]
Total intangibles subject to amortization	$ 26.3
Weighted average useful life in years	13 years
Backlog | e2v
Business Acquisition [Line Items]
Total intangibles subject to amortization	$ 2.8
Weighted average useful life in years	9 months