Preferred Shares - Summary of Preferred Share Dividend Activity (Detail) - USD ($) $ in Millions	12 Months Ended
	Jan. 02, 2016	Jan. 03, 2015
Temporary Equity [Line Items]
Less: dividends paid	$ (5.9)	$ (0.8)
Convertible Preferred Shares [Member]
Temporary Equity [Line Items]
Beginning balance , value	0.0
Plus: accrued dividends	4.5
Less: dividends paid	(4.5)
Ending balance , value	0.0	0.0
Non-convertible Preferred Shares [Member]
Temporary Equity [Line Items]
Beginning balance , value	0.0
Plus: accrued dividends	1.4
Less: dividends paid	(1.4)
Ending balance , value	$ 0.0	$ 0.0