Accumulated Other Comprehensive Income (Loss) Reclassification from Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Feb. 24, 2017	Nov. 25, 2016	Aug. 26, 2016	May 27, 2016	Feb. 26, 2016	Nov. 27, 2015	Aug. 28, 2015	May 29, 2015	Feb. 24, 2017	Feb. 26, 2016	Feb. 27, 2015
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Operating expenses									$ 809.3	$ 790.0	$ 768.0
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements and Curtailments									0.9	0.0
Income tax expense									(71.7)	(4.5)	(50.9)
Cost of sales									2,017.8	2,075.5	2,106.2
Net income	$ 25.8	$ 41.2	$ 38.2	$ 19.4	$ 77.5	$ 35.6	$ 37.2	$ 20.0	124.6	170.3	86.1
Other income (expense), net									11.9	16.3	$ 8.4
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income									(4.9)	(5.2)
Unrealized gain on investments [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income tax expense									0.1	0.0
Net income									(0.4)	(0.2)
Other income (expense), net									(0.5)	(0.2)
Minimum pension liability [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income tax expense									(3.5)	(3.2)
Net income									(4.5)	(5.0)
Prior Service Costs [Member] | Minimum pension liability [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Operating expenses									(4.8)	(5.0)
Cost of sales									(4.0)	(4.2)
Actuarial Loss [Member] | Minimum pension liability [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Operating expenses									0.1	0.8
Cost of sales									$ (0.2)	$ 0.2