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
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	$ (0.2)	$ 0.0	$ 0.1	$ 0.3
Net income	37.3	25.7	103.4	80.7
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(30.2)		(10.3)
Other comprehensive income (loss) before reclassifications	(6.7)		(24.4)
Amounts reclassified from accumulated other comprehensive income (loss)	(1.1)		(3.3)
Total other comprehensive income (loss), net	(7.8)	4.3	(27.7)	26.4
Balance as of November 23, 2018	(38.0)		(38.0)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax	1.1	2.0	2.7	0.5
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	(6.5)	6.3	(25.1)	26.6
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	29.5	$ 30.0	75.7	$ 107.1
Unrealized gain (loss) on investments [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Net of Tax	0.0		(0.3)
Other comprehensive income (loss) before reclassifications	(0.2)		0.1
Amounts reclassified from accumulated other comprehensive income (loss)	0.0		0.0
Total other comprehensive income (loss), net	(0.2)		0.1
Balance as of November 23, 2018	(0.2)		(0.2)
Pension and other post-retirement liability adjustments [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Net of Tax	13.1		14.7
Other comprehensive income (loss) before reclassifications	0.0		0.7
Amounts reclassified from accumulated other comprehensive income (loss)	(1.1)		(3.4)
Total other comprehensive income (loss), net	(1.1)		(2.7)
Balance as of November 23, 2018	12.0		12.0
Foreign currency translation adjustments [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(43.3)		(24.7)
Other comprehensive income (loss) before reclassifications	(6.5)		(25.2)
Amounts reclassified from accumulated other comprehensive income (loss)	0.0		0.1
Total other comprehensive income (loss), net	(6.5)		(25.1)
Balance as of November 23, 2018	$ (49.8)		$ (49.8)