Derivatives - Commodity Contracts (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 28, 2017	Jan. 30, 2016
Cash Flow Hedging
Movement in Accumulated Other Comprehensive Income [Roll Forward]
(Losses) gains recorded in AOCI, beginning of period	$ (5.7)
Losses (gains) recorded in AOCI, end of period	2.4	$ (5.7)
Commodity contracts
Movement in Accumulated Other Comprehensive Income [Roll Forward]
(Losses) gains recorded in AOCI, beginning of period	(3.7)
Losses (gains) recorded in AOCI, end of period	(2.1)	(3.7)
Commodity contracts | Cash Flow Hedging
Movement in Accumulated Other Comprehensive Income [Roll Forward]
(Losses) gains recorded in AOCI, beginning of period	(3.7)	5.7
Current period gains (losses) recognized in OCI	1.8	(12.0)
Losses (gains) recorded in AOCI, end of period	(2.1)	(3.7)
Commodity contracts | Cash Flow Hedging | Cost of sales
Movement in Accumulated Other Comprehensive Income [Roll Forward]
(Gains) losses reclassified from AOCI to net income	(0.2)	2.6
Interest rate contract | Cash Flow Hedging
Movement in Accumulated Other Comprehensive Income [Roll Forward]
(Losses) gains recorded in AOCI, beginning of period	(3.4)	0.0
Current period gains (losses) recognized in OCI	1.6	(6.1)
Losses (gains) recorded in AOCI, end of period	0.4	(3.4)
Interest rate contract | Cash Flow Hedging | Interest expense, net
Movement in Accumulated Other Comprehensive Income [Roll Forward]
(Gains) losses reclassified from AOCI to net income	$ 2.2	$ 2.7