Divestitures and Acquisitions (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Feb. 28, 2014	Nov. 22, 2013	Aug. 23, 2013	May 24, 2013	Feb. 22, 2013	Nov. 23, 2012	Aug. 24, 2012	May 25, 2012	Feb. 28, 2014	Feb. 22, 2013	Feb. 24, 2012
Schedule of Divestitures, Acquisitions, Ownership Transitions and Deconsolidations [Line Items]
Gross profit	$ 248.4	$ 242.8	$ 244.3	$ 209.7	$ 216.0	$ 225.9	$ 228.1	$ 196.0	$ 945.2	$ 866.0	$ 809.7
Operating income (loss)	54.2	39.3	52.0	20.4	(45.2)	38.4	46.8	19.3	165.9	59.3	97.1
Restructuring costs									6.6	34.7	30.5
BKMBusinessAcquistion [Member]
Schedule of Divestitures, Acquisitions, Ownership Transitions and Deconsolidations [Line Items]
Business Acquisition, Cost of Acquired Entity, Cash Paid											18.7
Business Acquisition, Purchase Price Allocation, Goodwill Amount											2.0
Business Acquisition, Purchase Price Allocation, Intangible Assets Other than Goodwill											0.3
PolyvisionSASandPolyvisionA/S [Member]
Schedule of Divestitures, Acquisitions, Ownership Transitions and Deconsolidations [Line Items]
Proceeds from divestiture of businesses										2.3
Revenues											8.6
Gross profit											1.6
Operating income (loss)											0.1
Restructuring costs					$ 0.9