Income Taxes Income Tax Reconciliation (Details) - USD ($) $ in Millions		12 Months Ended
		Feb. 28, 2020	Feb. 22, 2019	Feb. 23, 2018
U.S. federal statutory tax rate		21.00%		32.90%
Tax expense at the U.S. federal statutory rate		$ 51.5	$ 34.4	$ 53.2
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount	[1]	0.0	(1.6)	27.9
Foreign investment tax credits	[2]	0.0	0.0	(1.6)
Valuation allowance provisions and adjustments	[3]	(1.3)	(1.3)	0.4
COLI income	[4]	(1.4)	(1.6)	(3.4)
Effective Income Tax Rate Reconciliation, Tax Settlement, Foreign, Amount	[5]	4.9	7.8	1.4
State and local income taxes, net of federal		6.4	5.7	6.7
Foreign operations, less applicable foreign tax credits	[6]	(1.2)	(0.8)	4.0
Research tax credit		(2.9)	(2.9)	(2.3)
Tax reserve adjustments	[7]	0.0	0.0	(0.2)
Other		1.1	(1.8)	(5.3)
Income tax expense		$ 45.5	$ 37.9	$ 80.8

[1] We remeasured certain deferred tax assets and liabilities based on the rates at which they are expected to reverse in the future, which are generally 21.0%. Those items that reversed in 2018 were remeasured using a tax rate of 32.9%. We recorded a provisional decrease to deferred tax assets of $23.9 attributable to the rate reduction and a provisional tax liability of $4.0 related to transition tax for 2018. During 2019, we recorded adjustments reducing the impact of the rate change and the transition tax by $1.0 and $0.6 respectively, representing a tax rate reduction of 1%.

[2] Investment tax credits were granted by the Czech Republic for investments in qualifying manufacturing equipment.

[3] The valuation allowance provisions were based on current year activity, and the valuation allowance adjustments, including a reversal of valuation allowance at an affiliate in the U.K., were based on various factors, which are further detailed below.

[4] The increase in the cash surrender value of COLI policies, net of normal insurance expenses, plus maturity benefits are non-taxable

[5] The foreign operations, less applicable foreign tax credits, amounts include the rate differential between local statutory rates and the U.S. rate on foreign operations.

[6] Scheduled changes to the French corporate tax rate resulted in the revaluation of certain deferred tax assets of our French tax group.

[7]