Accumulated Other Comprehensive Income (Loss) Reclassifications out of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Nov. 23, 2018	Nov. 24, 2017	Nov. 23, 2018	Nov. 24, 2017
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of sales		$ 622.7	$ 521.3	$ 1,726.0	$ 1,529.6
Income Tax Expense (Benefit)		7.9	12.0	32.2	36.1
Net income		37.3	25.7	103.4	80.7
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income		(1.1)	(1.5)	(3.3)	0.2
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 (Benefit)		0.4	1.0	1.0	0.8
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]
Other Income	[1]	(0.9)	(0.7)	(2.6)	(2.4)
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]
Other Income	[1]	(0.6)	(1.8)	(1.8)	(5.3)
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]
Other Income	[1]	0.0	0.0	0.0	7.1
Reclassification out of accumulated Other Comprehensive Income due to Defined Benefit Plan Settlements [Member] | Foreign Currency [Domain] | 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]
Other Income	[1]	$ 0.0	$ 0.0	$ 0.1	$ 0.0

[1] Reclassified from Cost of sales and Operating expenses to Other income (expense), net as a result of the adoption of ASU 2017-07.