Business Acquisitions, Goodwill and Acquired Intangible Assets (Acquired Intangible Assets) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2019	Dec. 30, 2018	Dec. 31, 2017
Schedule of Intangible Assets, Including Goodwill [Line Items]
Weighted average useful life in years	6 years 8 months 12 days
Goodwill	$ 2,050.5	$ 1,735.2	$ 1,776.7
Trademarks
Schedule of Intangible Assets, Including Goodwill [Line Items]
Intangibles not subject to amortization	$ 163.5	$ 151.5
Proprietary technology
Schedule of Intangible Assets, Including Goodwill [Line Items]
Weighted average useful life in years	6 years 8 months 12 days
Customer list/relationships
Schedule of Intangible Assets, Including Goodwill [Line Items]
Weighted average useful life in years	7 years
Backlog
Schedule of Intangible Assets, Including Goodwill [Line Items]
Weighted average useful life in years	1 year
Trademarks
Schedule of Intangible Assets, Including Goodwill [Line Items]
Weighted average useful life in years	3 years 3 months 18 days
Acquisitions In 2019
Schedule of Intangible Assets, Including Goodwill [Line Items]
Intangibles subject to amortization	$ 110.4
Weighted average useful life in years	10 years 3 months 18 days
Total acquired intangible assets	$ 122.3
Goodwill	304.9
Acquisitions In 2019 | Trademarks
Schedule of Intangible Assets, Including Goodwill [Line Items]
Intangibles not subject to amortization	11.9
Acquisitions In 2019 | Proprietary technology
Schedule of Intangible Assets, Including Goodwill [Line Items]
Intangibles subject to amortization	$ 81.8
Weighted average useful life in years	9 years 9 months 18 days
Acquisitions In 2019 | Customer list/relationships
Schedule of Intangible Assets, Including Goodwill [Line Items]
Intangibles subject to amortization	$ 27.9
Weighted average useful life in years	11 years 10 months 24 days
Acquisitions In 2019 | Backlog
Schedule of Intangible Assets, Including Goodwill [Line Items]
Intangibles subject to amortization	$ 0.7
Weighted average useful life in years	1 year 6 months