Accumulated Other Comprehensive Income (Loss) Accumulated Other Comprehensive Income (Loss) Rollforward (Details) - USD ($) $ in Millions	12 Months Ended
	Feb. 28, 2020	Feb. 22, 2019	Feb. 23, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss)	$ (47.3)	$ (10.3)	$ (50.6)
Other comprehensive income (loss) before reclassifications	(20.8)	(31.7)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(1.2)	(5.3)
Total other comprehensive income (loss), net	(22.0)	(37.0)	40.3
Accumulated other comprehensive income (loss)	(69.3)	(47.3)	(10.3)
Unrealized gain on investments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss)	0.0	(0.3)
Other comprehensive income (loss) before reclassifications	0.4	0.3
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(0.5)	0.0
Total other comprehensive income (loss), net	(0.1)	0.3
Accumulated other comprehensive income (loss)	(0.1)	0.0	(0.3)
Minimum pension liability [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss)	9.7	14.7
Other comprehensive income (loss) before reclassifications	(10.4)	0.5
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(2.4)	(5.5)
Total other comprehensive income (loss), net	(12.8)	(5.0)
Accumulated other comprehensive income (loss)	(3.1)	9.7	14.7
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss)	(9.6)
Accumulated other comprehensive income (loss)	(8.6)	(9.6)
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss)	(47.4)	(24.7)
Other comprehensive income (loss) before reclassifications	(10.8)	(22.8)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	0.7	0.1
Total other comprehensive income (loss), net	(10.1)	(22.7)
Accumulated other comprehensive income (loss)	(57.5)	(47.4)	(24.7)
Derivative [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss)		0.0
Other comprehensive income (loss) before reclassifications	0.0	(9.7)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	1.0	0.1
Total other comprehensive income (loss), net	$ 1.0	$ (9.6)
Accumulated other comprehensive income (loss)			$ 0.0