Employee Benefit Plan Obligations Narrative (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Feb. 28, 2014	Feb. 22, 2013	Feb. 24, 2012
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Document Period End Date	Feb. 28, 2014
Pension Contributions	$ 6
Other Postretirement Benefits Payments	5
Deferred Compensation Arrangement with Individual, Compensation Expense	5.0	4.8	2.2
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate	4.50%	4.50%
Defined Contribution Plan, Cost Recognized	22.6	19.0	16.3
Defined Contribution Plan, Estimated Future Employer Contributions in Next Fiscal Year	24.6
Defined Benefit Plan, Effect of Plan Amendment on Accumulated Benefit Obligation			20.9
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.
Defined Benefit Plan, Fair Value of Plan Assets	55.0	50.2
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)	5.7	12.4
Defined Benefit Plan, Fair Value of Plan Assets	0	0	0
Defined Benefit Plan, Benefit Obligation	69.1	77.3	90.9
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	7.04%	7.51%
Qualified Defined Benefit Pension Plan [Member] | Foreign Postretirement Benefit Plan in over funded status, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	13.8
Defined Benefit Plan, Benefit Obligation	12.2
Benefit Plan, Benefit plan assets in excess of benefit obligations	$ 1.6