Income Taxes Income Tax Contingencies (Details) - USD ($) $ in Millions	12 Months Ended
	Feb. 25, 2022	Feb. 26, 2021	Feb. 28, 2020
Unrecognized Tax Benefits [Roll Forward]
Unrecognized tax benefits, beginning of period	$ 2.3	$ 2.0	$ 2.0
Gross decreases - tax positions in prior period	0.0	0.0	0.0
Lapse of statute of limitations	$ 0.2	0.3	0.0
Unrecognized tax benefits, end of period		$ 2.3	$ 2.0