Business Overview - Allowance for Credit Losses Rollforward (Details) $ in Millions	3 Months Ended
	Mar. 27, 2020 USD ($)
Accounts And Financing Receivable, Allowance For Credit Loss [Roll Forward]
Beginning balance	$ 82.1
Provision	12.0
Write-offs	(13.2)
FX and Other	(5.1)
Ending balance	115.8
Cumulative Effect, Period of Adoption, Adjustment
Accounts And Financing Receivable, Allowance For Credit Loss [Roll Forward]
Beginning balance	$ 40.0