Property, Plant And Equipment Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Feb. 28, 2020	Feb. 22, 2019	Feb. 23, 2018
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	$ 426.3	$ 455.5
Depreciation	73.2	69.3	$ 64.5
Construction in Progress, Estimated Cost to Complete	29.8	33.2
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	201.4	203.2
Building and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	$ 104.7	$ 118.5