Supplemental Cash Flow Information - Changes In Operating Assets And Liabilities, Net of Acquisitions (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 01, 2017	Jan. 03, 2016		Dec. 28, 2014
Supplemental Cash Flow Elements [Abstract]
Increase in trade accounts receivable	$ (93.9)	$ (64.2)		$ (155.4)
Increase in prepaid expenses and other assets	(11.0)	(5.2)		(14.7)
Increase in accounts payable and accrued liabilities	58.4	50.9		36.4
Increase (decrease) in accrued payroll and related taxes	1.9	(23.7)		28.5
Increase (decrease) in accrued insurance	2.4	(4.2)		(2.7)
Increase in income and other taxes	2.2	0.5		10.9
Total changes in operating assets and liabilities	$ (40.0)	$ (45.9)	[1]	$ (97.0)

[1] Fiscal year included 53 weeks.