Employee Benefit Plan Obligations Narrative (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Feb. 28, 2014	Feb. 22, 2013	Feb. 24, 2012	Feb. 25, 2011
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Pension Contributions	$ 6
Other Postretirement Benefits Payments	5
Deferred Compensation Arrangement with Individual, Compensation Expense		4.8	2.2	5.1
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate		4.50%	4.50%
Defined Contribution Plan, Cost Recognized		19.0	16.3	3.4
Defined Contribution Plan, Estimated Future Employer Contributions in Next Fiscal Year		20.6
Defined Benefit Plan, Effect of Plan Amendment on Accumulated Benefit Obligation			20.9	24.4
Defined Benefit Plan, Description of Plan Amendment			we changed the model of the post-retirement benefit plan and cost-sharing provisions for the post-65 retiree population. This change resulted in a company-provided fixed subsidy towards post-retirement healthcare benefits for eligible retirees.	we changed the cost sharing provisions of the post-retirement benefit plan that provides medical benefits to certain North American-based retirees and eligible dependents, which increased the required contributions for certain retirees.
Prescription Drug Benefit, Reduction in Deferred Tax Asset due to change in Medicare Part D				11.4
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Actuarial Gain (Loss)		$ 12.4	$ (0.9)
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 for Next Fiscal Year		7.51%	8.10%
Post-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 for Next Fiscal Year			6.48%