Updates to Significant Accounting Policies - Financial Impact On Cash Flow (Details) - USD ($) $ in Millions		3 Months Ended			12 Months Ended
		Mar. 30, 2018	Mar. 31, 2017	[1]	Dec. 29, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net cash provided by operating activities		$ 82.9	$ 104.0		$ 429.7
Net cash used in investing activities		(353.5)	(95.3)		(371.2)
Net cash provided by financing activities		$ 180.3	$ 51.0		66.5
Scenario, 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					411.9
Net cash used in investing activities					(366.0)
Net cash provided by financing activities					79.1
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]				17.8
Net cash used in investing activities	[2]				(5.2)
Net cash provided by financing activities	[2]				$ (12.6)

[1] See Note 2 for a summary of adjustments

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