Employee Benefit Plan Obligations Minimum Pension Liability (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	May 27, 2016	Feb. 28, 2020	Feb. 22, 2019	Feb. 23, 2018
Retirement Benefits [Abstract]
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Foreign Currency Translation Adjustments,after Tax		$ 0.1	$ 0.5
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, after Tax		(2.3)	2.5
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized as part of the settlement, before Tax		0.0	0.0
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized as part of the settlement, Tax		0.0	0.0
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized as part of the settlement, after Tax		0.0	0.0
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Prior Service Cost, before Tax		(0.1)	(3.5)
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Minimum Pension Liability, before Tax (Deprecated 2017-01-31)		(7.4)	9.5	$ 16.1
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Minimum Pension Liability, Tax		4.3	0.2	(1.4)
Defined Benefit Plan, Accumulated Other Comprehensive Income Minimum Pension Liability, after Tax (Deprecated 2017-01-31)		(3.1)	9.7	14.7
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Prior Service Cost Arising During Period, before Tax	$ (1.0)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Tax	0.2
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Prior Service Costs Arising During Period, Net of Tax	$ (0.8)
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost Recognized in Net Periodic Benefit Cost, before Tax		(0.1)	(2.5)
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost Recognized in Net Periodic Benefit Cost, Tax		0.0	0.6
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost Recognized in Net Periodic Pension Cost, Net of Tax		(0.1)	(1.9)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Prior Service Cost, Tax		0.0	0.8
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Prior Service Cost, after Tax		(0.1)	(2.7)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax		(13.9)	(0.2)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Tax		3.4	(0.1)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, after Tax		10.5	(0.3)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Gain (Loss), before Tax		(16.9)	(3.7)
Pension and other post-retirement liability adjustments		(16.9)	(6.6)	1.1
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Tax		4.1	1.6
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax		12.8	5.0	$ (1.7)
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, before Tax		3.0	3.5
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, Tax		0.7	1.0
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Gain (Loss), Tax		4.1	0.9
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Gain (Loss), after Tax		(12.8)	(2.8)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Foreign Currency Translation Adjustments, before Tax		0.1	0.6
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Foreign Currency Translation Adjustments, Tax		$ 0.0	$ (0.1)