Income Taxes Income Tax Reconciliation (Details) - USD ($) $ in Millions		12 Months Ended
		Feb. 22, 2019	Feb. 23, 2018	Feb. 24, 2017
Valuation Allowance, Deferred Tax Assets, Reversal of Valuation Allowances, Amount		$ 1.7
U.S. federal statutory tax rate		21.00%	32.90%	35.00%
Tax expense at the U.S. federal statutory rate		$ 34.4	$ 53.2	$ 68.7
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount	[1]	(1.6)	27.9	0.0
Foreign investment tax credits	[2]	0.0	(1.6)	0.0
Valuation allowance provisions and adjustments	[3]	(1.3)	0.4	(2.2)
COLI income	[4]	(1.6)	(3.4)	(3.3)
Effective Income Tax Rate Reconciliation, Tax Settlement, Foreign, Amount	[5]	7.8	1.4	(2.0)
State and local income taxes, net of federal		5.7	6.7	6.5
Foreign operations, less applicable foreign tax credits	[6]	(0.8)	4.0	9.3
Research tax credit		(2.9)	(2.3)	(1.8)
Tax reserve adjustments	[7]	0.0	(0.2)	(5.3)
Other		(1.8)	(5.3)	1.8
Income tax expense		37.9	80.8	71.7
income tax expense increase/decrease due to rate change		$ 27.9
FRANCE
income tax expense increase/decrease due to rate change			4.0	$ 7.9
UNITED KINGDOM
income tax expense increase/decrease due to rate change			$ 1.5

[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 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 death benefit gains 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] (6)Reductions to the French corporate tax rate resulted in the revaluation of certain deferred tax assets of our French tax group, causing an increase to income tax expense of $4.0 and $7.9 in 2018 and 2017, respectively. During 2017, reductions to the United Kingdom corporate tax rate increased tax expense by $1.5.

[7] Adjustments in 2017 related to a French income tax audit that was settled in 2017.