Accumulated Other Comprehensive Income Reclassifications out of Accumulated Other Comprehensive Income (Loss) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
Nov. 28, 2014	Nov. 22, 2013	Nov. 28, 2014	Nov. 22, 2013
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other income, net	$ 2.3us-gaap_OtherNonoperatingIncomeExpense	$ 3.0us-gaap_OtherNonoperatingIncomeExpense	$ 9.0us-gaap_OtherNonoperatingIncomeExpense	$ 4.8us-gaap_OtherNonoperatingIncomeExpense
Income tax expense	5.0us-gaap_IncomeTaxExpenseBenefit	15.5us-gaap_IncomeTaxExpenseBenefit	41.5us-gaap_IncomeTaxExpenseBenefit	38.8us-gaap_IncomeTaxExpenseBenefit
Cost of sales	549.0us-gaap_CostOfGoodsAndServicesSold	541.1us-gaap_CostOfGoodsAndServicesSold	1,589.6us-gaap_CostOfGoodsAndServicesSold	1,511.7us-gaap_CostOfGoodsAndServicesSold
Operating expenses	194.9us-gaap_OperatingExpenses	189.8us-gaap_OperatingExpenses	578.2us-gaap_OperatingExpenses	563.8us-gaap_OperatingExpenses
Net income	11.8us-gaap_NetIncomeLoss	23.0us-gaap_NetIncomeLoss	63.3us-gaap_NetIncomeLoss	63.8us-gaap_NetIncomeLoss
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income	(1.5)	(1.4)	(4.1)	(3.9)
Unrealized gain on investments [Member] \| Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other income, net	0	0	0	(0.1)
Income tax expense	0	0	0	0
Net income	0	0	0	(0.1)
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other income, net	0.1	0	0.1	0
Income tax expense	0	0	0	0
Net income	0.1	0	0.1	0
Pension and other post-retirement liability adjustments [Member] \| Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income tax expense	0.7	0.8	2.4	2.3
Net income	(1.6)	(1.4)	(4.2)	(3.8)
Actuarial Losses (gains) [Member] \| Pension and other post-retirement liability adjustments [Member] \| Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of sales	(0.1)	0	(0.1)	0.2
Operating expenses	0	0.2	0.2	0.7
Prior Service Cost (Credit) [Member] \| Pension and other post-retirement liability adjustments [Member] \| Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of sales	(1.1)	(1.1)	(3.2)	(3.3)
Operating expenses	$ (1.1)	$ (1.3)	$ (3.5)	$ (3.7)

The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

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Reference 5: http://www.xbrl.org/2003/role/presentationRef

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Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Includes selling, general and administrative expense.

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

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