Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Aug. 28, 2020	Aug. 23, 2019	Aug. 28, 2020	Aug. 23, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (56.3)	$ (61.8)	$ (56.3)	$ (61.8)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(0.1)		0.1
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	21.6		13.0
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive income (loss), beginning of period	(77.9)	(55.1)	(69.3)	(47.3)
Other comprehensive income (loss) before reclassifications	21.7		13.1
Amounts reclassified from accumulated other comprehensive income (loss)	0.1		(0.1)
Interest Expense	6.8	6.7	14.1	13.4
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	21.6		13.0
Accumulated Other Comprehensive Income (Loss), End of Period	(56.3)	(61.8)	(56.3)	(61.8)
Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(0.1)	(1.1)	(0.1)	(1.4)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Amounts reclassified from accumulated other comprehensive income (loss)	0.1	1.1	0.1	1.4
Unrealized gain (loss) on investments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(0.2)		(0.2)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	0.0		0.0
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	0.1		(0.1)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive income (loss), beginning of period	(0.3)		(0.1)
Other comprehensive income (loss) before reclassifications	0.1		(0.1)
Amounts reclassified from accumulated other comprehensive income (loss)	0.0		0.0
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	0.1		(0.1)
Accumulated Other Comprehensive Income (Loss), End of Period	(0.2)		(0.2)
Pension and other post-retirement liability adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(3.9)		(3.9)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(0.3)		0.5
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(1.1)		(0.8)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive income (loss), beginning of period	(2.8)		(3.1)
Other comprehensive income (loss) before reclassifications	(0.8)		(0.3)
Amounts reclassified from accumulated other comprehensive income (loss)	0.3		(0.5)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(1.1)		(0.8)
Accumulated Other Comprehensive Income (Loss), End of Period	(3.9)		(3.9)
Pension and other post-retirement liability adjustments [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(0.3)	(0.8)	(0.5)	(1.3)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Amounts reclassified from accumulated other comprehensive income (loss)	0.3	0.8	0.5	1.3
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(8.2)		(8.2)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(0.2)		(0.4)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	0.2		0.4
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive income (loss), beginning of period	(8.4)		(8.6)
Other comprehensive income (loss) before reclassifications	0.0		0.0
Amounts reclassified from accumulated other comprehensive income (loss)	0.2		0.4
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	0.2		0.4
Accumulated Other Comprehensive Income (Loss), End of Period	(8.2)		(8.2)
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	0.2	0.2	0.4	0.4
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Amounts reclassified from accumulated other comprehensive income (loss)	(0.2)	$ (0.2)	(0.4)	$ (0.4)
Foreign currency translation adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(44.0)		(44.0)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	0.0		0.0
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	22.4		13.5
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive income (loss), beginning of period	(66.4)		(57.5)
Other comprehensive income (loss) before reclassifications	22.4		13.5
Amounts reclassified from accumulated other comprehensive income (loss)	0.0		0.0
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	22.4		13.5
Accumulated Other Comprehensive Income (Loss), End of Period	$ (44.0)		$ (44.0)