Employee Benefit Plan Obligations Minimum Pension Liability (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Feb. 28, 2014	Feb. 22, 2013	Feb. 24, 2012
Compensation and Retirement Disclosure [Abstract]
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Foreign Currency Translation Adjustments,after Tax	$ (0.3)	$ 0.4
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, after Tax	1.0	(0.9)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Prior Service Cost, before Tax	(9.2)	(9.3)
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Minimum Pension Liability, before Tax	24.5	23.4	23.4
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Minimum Pension Liability, Tax	(4.9)	(4.5)	(3.7)
Defined Benefit Plan, Accumulated Other Comprehensive Income Minimum Pension Liability, after Tax	19.6	18.9	19.7
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Prior Service Cost Arising During Period, before Tax	(0.1)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Prior Service Cost Arising During Period, Tax	0
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Prior Service Costs Arising During Period, Net of Tax	(0.1)
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost Recognized in Net Periodic Benefit Cost, before Tax	(9.1)	(9.3)
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost Recognized in Net Periodic Benefit Cost, Tax	3.5	3.5
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost Recognized in Net Periodic Pension Cost, Net of Tax	(5.6)	(5.8)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Prior Service Cost, Tax	3.5	3.5
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Prior Service Cost, after Tax	(5.7)	(5.8)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, before Tax	8.9	7.6
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Tax	(3.5)	(3.9)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Net of Tax	(5.4)	3.7
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Gain (Loss), before Tax	10.4	9.0
Pension and other post-retirement liability adjustments	1.1	0	0.5
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Tax	(0.4)	(0.8)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	(0.7)	0.8	0.1
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, before Tax	(1.5)	(1.4)
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, Tax	(0.5)	(0.5)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Gain (Loss), Tax	(4.0)	(4.4)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Gain (Loss), after Tax	6.4	(4.6)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Foreign Currency Translation Adjustments, before Tax	(0.4)	0.3
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Foreign Currency Translation Adjustments, Tax	$ 0.1	$ 0.1