Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Nov. 24, 2017	Nov. 25, 2016	Nov. 24, 2017	Nov. 25, 2016
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (28.5)		$ (50.6)
Other comprehensive income (loss) before reclassifications	5.8		26.2
Amounts reclassified from accumulated other comprehensive income (loss)	(1.5)		0.2
Total other comprehensive income (loss), net	4.3	$ (19.7)	26.4	$ (19.0)
Balance as of November 24, 2017	(24.2)		(24.2)
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	0.0		0.3
Amounts reclassified from accumulated other comprehensive income (loss)	0.0		0.0
Total other comprehensive income (loss), net	0.0		0.3
Balance as of November 24, 2017	0.0		0.0
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	14.5		13.0
Other comprehensive income (loss) before reclassifications	(0.5)		(0.7)
Amounts reclassified from accumulated other comprehensive income (loss)	(1.5)		0.2
Total other comprehensive income (loss), net	(2.0)		(0.5)
Balance as of November 24, 2017	12.5		12.5
Foreign currency translation adjustments [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(43.0)		(63.3)
Other comprehensive income (loss) before reclassifications	6.3		26.6
Amounts reclassified from accumulated other comprehensive income (loss)	0.0		0.0
Total other comprehensive income (loss), net	6.3		26.6
Balance as of November 24, 2017	$ (36.7)		$ (36.7)