Updates to Significant Accounting Policies - Financial Impact On Cash Flow (Details) - USD ($) $ in Millions		9 Months Ended
		Sep. 28, 2018	Sep. 29, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net cash provided by operating activities		$ 384.8	$ 322.6	[1]
Net cash used in investing activities		(1,612.8)	(328.2)	[1]
Net cash provided by financing activities		$ 1,083.0	26.9	[1]
Previously Reported [Member] | Accounting Standards Update 2016-15 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net cash provided by operating activities			310.0
Net cash used in investing activities			(322.9)
Net cash provided by financing activities			34.2
Restatement Adjustment [Member] | Accounting Standards Update 2016-15 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net cash provided by operating activities	[2]		12.6
Net cash used in investing activities	[2]		(5.3)
Net cash provided by financing activities	[2]		$ (7.3)

[1] See Note 2 for a summary of adjustments

[2] Adjusted to reflect the adoption of Statement of Cash Flows