Accumulated Other Comprehensive Income (Loss) Reclassifications out of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended
	May 26, 2017	May 27, 2016
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Accumulated other comprehensive loss	$ (50.6)
Other comprehensive income (loss) before reclassifications	11.0
Amounts reclassified from accumulated other comprehensive income (loss)	3.3
Net current period other comprehensive income (loss)	14.3	$ 2.4
Accumulated other comprehensive loss	(36.3)
Cost of sales	492.3	484.8
Operating expenses	212.9	196.1
Income tax expense	10.3	12.3
Net income	18.1	19.4
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income	3.3	(1.3)
Unrealized gain (loss) on investments [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Accumulated other comprehensive loss	(0.3)
Other comprehensive income (loss) before reclassifications	0.0
Amounts reclassified from accumulated other comprehensive income (loss)	0.0
Net current period other comprehensive income (loss)	0.0
Accumulated other comprehensive loss	(0.3)
Pension and other post-retirement liability adjustments [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Accumulated other comprehensive loss	13.0
Other comprehensive income (loss) before reclassifications	(0.5)
Amounts reclassified from accumulated other comprehensive income (loss)	3.3
Net current period other comprehensive income (loss)	2.8
Accumulated other comprehensive loss	15.8
Pension and other post-retirement liability adjustments [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income tax expense	(1.2)	1.0
Foreign currency translation adjustments [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Accumulated other comprehensive loss	(63.3)
Other comprehensive income (loss) before reclassifications	11.5
Amounts reclassified from accumulated other comprehensive income (loss)	0.0
Net current period other comprehensive income (loss)	11.5
Accumulated other comprehensive loss	(51.8)
Actuarial losses (gains) [Member] | Pension and other post-retirement liability adjustments [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of sales	(0.4)	(0.1)
Operating expenses	(0.4)	0.0
Prior service cost (credit) [Member] | Pension and other post-retirement liability adjustments [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of sales	(0.8)	(1.0)
Operating expenses	(1.0)	(1.2)
Reclassification out of accumulated Other Comprehensive Income due to Defined Benefit Plan Settlements [Member] | Actuarial losses (gains) [Member] | Pension and other post-retirement liability adjustments [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of sales	3.9	0.0
Operating expenses	$ 3.2	$ 0.0