Property, Plant And Equipment Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Feb. 22, 2019	Feb. 23, 2018	Feb. 24, 2017
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	$ 455.5	$ 435.1
Depreciation	69.3	64.5	$ 59.3
Construction in Progress, Estimated Cost to Complete	33.2	15.4
Assets Held-for-sale, Not Part of Disposal Group		13.4
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	203.2	183.4
Building and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	$ 118.5	$ 116.0