Employee Benefit Plan Obligations Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Feb. 28, 2020	Feb. 22, 2019	Feb. 23, 2018
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Contributions by Employer	$ 3.6
Multiemployer Plan, Contributions by Employer		$ 0.2	$ 0.2
Deferred Compensation Arrangement with Individual, Compensation Expense	3.3	4.6	5.9
Defined Contribution Plan, Cost	37.5	35.3	33.7
Defined Benefit Plan, Plan Assets, Amount	31.3	30.0
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 3.4
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year, Description	$42.2
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Contributions by Employer	$ 4.0	3.6
Defined Benefit Plan, Plan Assets, Amount	0.0	0.0	0.0
Defined Benefit Plan, Benefit Obligation	44.3	40.7	43.4
Pension Plans, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Contributions by Employer	4.9	4.3
Defined Benefit Plan, Plan Assets, Amount	31.3	30.0	33.1
Defined Benefit Plan, Benefit Obligation	$ 82.5	$ 76.2	$ 80.1
Pre-Age 65 Retirees [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Health Care Cost Trend Rate Assumed, Next Fiscal Year	6.51%	6.75%
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate	4.50%	4.50%
Foreign Plan [Member] | Qualified Defined Benefit Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 31.3	$ 30.0
Defined Benefit Plan, Benefit Obligation	$ 49.5	$ 44.7