Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Feb. 25, 2017	Feb. 27, 2016	Feb. 28, 2015
Income Tax Contingency [Line Items]
Net operating loss carryforwards for state tax purposes	$ 46.8
Deferred tax assets, valuation allowance	0.6
Payments of income taxes	(15.1)	$ 29.6	$ 39.3
Total unrecognized tax benefits	2.6	3.2
Unrecognized tax benefits that would impact effective tax rate	1.9	2.3
Unrecognized tax benefits reasonably possible decreases resulting from settlements with taxing authorities	0.4
Income tax examination penalties and interest expense (reversal)	(0.3)	(0.8)	$ (0.5)
Income tax examination penalties and interest accrued	$ 0.4	$ 0.7
Minimum
Income Tax Contingency [Line Items]
Net operating loss carryforwards, expiration year	2023
Maximum
Income Tax Contingency [Line Items]
Net operating loss carryforwards, expiration year	2033
State and Local Jurisdiction
Income Tax Contingency [Line Items]
Net operating loss carryforwards for state tax purposes	$ 1.4