Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended
	May 25, 2018	May 26, 2017
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (10.3)
Other comprehensive income (loss) before reclassifications	(11.7)
Amounts reclassified from accumulated other comprehensive income (loss)	(1.2)
Total other comprehensive income (loss), net	(12.9)	$ 14.3
Balance as of May 25, 2018	(23.2)
Unrealized gain (loss) on investments [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(0.3)
Other comprehensive income (loss) before reclassifications	0.1
Amounts reclassified from accumulated other comprehensive income (loss)	0.0
Total other comprehensive income (loss), net	0.1
Balance as of May 25, 2018	(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	14.7
Other comprehensive income (loss) before reclassifications	0.4
Amounts reclassified from accumulated other comprehensive income (loss)	(1.2)
Total other comprehensive income (loss), net	(0.8)
Balance as of May 25, 2018	13.9
Foreign currency translation adjustments [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(24.7)
Other comprehensive income (loss) before reclassifications	(12.2)
Amounts reclassified from accumulated other comprehensive income (loss)	0.0
Total other comprehensive income (loss), net	(12.2)
Balance as of May 25, 2018	$ (36.9)