Accumulated Other Comprehensive Income Impact of Accumulated Other Comprehensive Income (Loss) on Income Statement (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	May 24, 2013	May 25, 2012
Other income, net	$ 1.2	$ 3.8
Income tax expense	4.6	6.5
Cost of sales	457.2	474.1
Operating expenses	185.1	176.7
Net income	13.2	13.2
Reclassification out of Accumulated Other Comprehensive Income [Member]
Net income	(0.9)
Unrealized gain on investments [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Other income, net	0.1
Income tax expense	0
Net income	0.1
Minimum pension liability [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Income tax expense	0.7
Net income	(1.0)
Actuarial Loss [Member] | Minimum pension liability [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Cost of sales	0.1
Operating expenses	0.3
Prior Service Costs [Member] | Minimum pension liability [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Cost of sales	(1.0)
Operating expenses	$ (1.1)