Employee Benefit Plan Obligations Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Feb. 22, 2019	Feb. 23, 2018	Feb. 24, 2017
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Contributions by Employer	$ 5.1
Multiemployer Plan, Contributions by Employer	$ 0.2	$ 0.2	$ 0.3
Defined Benefit Plan, Assumed Health Care Cost Trend Rate, Description	0.0675
Deferred Compensation Arrangement with Individual, Compensation Expense	$ 4.6	$ 5.9	8.5
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate	4.50%	4.50%
Defined Contribution Plan, Cost	$ 35.3	$ 33.7	32.7
Defined Benefit Plan, Fair Value of Plan Assets	30.0	33.1
Defined Benefit Plan, Assets for Plan Benefits	0.0	0.5
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 3.6
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year, Description	$38.6
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	$ 3.6	3.4
Defined Benefit Plan, Fair Value of Plan Assets	0.0	0.0	0.0
Defined Benefit Plan, Benefit Obligation	40.7	43.4	46.0
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	4.3	4.5
Defined Benefit Plan, Fair Value of Plan Assets	30.0	33.1	46.7
Defined Benefit Plan, Benefit Obligation	76.2	$ 80.1	$ 96.8
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		7.01%
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, Fair Value of Plan Assets	30.0	$ 33.1
Defined Benefit Plan, Benefit Obligation	$ 44.7	$ 47.5