Employee Benefit Plan Obligations (Details) - USD ($) $ in Millions		12 Months Ended
		Feb. 24, 2017	Feb. 26, 2016	Feb. 27, 2015
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Obligation		$ 23.8	$ 22.5
Deferred Compensation Liability, Current and Noncurrent		49.2	43.1
Employee Benefit Plan Obligation, Long-Term Portion		134.3	142.5
Employee Benefit Plan Obligations, Total		169.1	177.9
Defined Benefit Plan, Current Assets		0.2	0.0
Defined Benefit Plan, Assets for Plan Benefits, Noncurrent		0.0	1.1
Defined Benefit Plan, Assets for Plan Benefits		0.2	1.1
Employee benefit plan obligations		35.0	36.5
Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent		(134.3)	(142.5)
Pension and Other Postretirement Defined Benefit Plans, Liabilities		169.3	179.0
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Fair Value of Plan Assets		47.3
Defined Benefit Plan, Fair Value of Plan Assets		46.7	47.3
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Gain (Loss), before Tax		12.2	10.4
Pension and other post-retirement liability adjustments		4.7	2.6	$ (16.8)
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, before Tax		0.8	1.0
Defined Benefit Plan, Effect of One Percentage Point Increase on Service and Interest Cost Components		0.0
Defined Benefit Plan, Effect of One Percentage Point Decrease on Service and Interest Cost Components		0.0
Defined Benefit Plan, Effect of One Percentage Point Increase on Accumulated Postretirement Benefit Obligation		0.2
Defined Benefit Plan, Effect of One Percentage Point Decrease on Accumulated Postretirement Benefit Obligation		(0.2)
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Administration Expenses		(0.2)	(0.2)
Defined Benefit Plan, Amounts Recognized in Balance Sheet		50.1	46.1
Defined Benefit Plan, Current Assets		0.2	0.0
Defined Benefit Plan, Assets for Plan Benefits, Noncurrent		0.0	1.1
Employee benefit plan obligations		3.6	3.5
Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent		(46.7)	(43.7)
Pension and Other Postretirement Defined Benefit Plans, Liabilities		50.1	46.1
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Fair Value of Plan Assets		47.3	54.5
Defined Benefit Plan, Actual Return on Plan Assets		4.7	(1.2)
Defined Benefit Plan, Contributions by Employer		6.0	4.0
Defined Benefit Plan, Contributions by Plan Participants		0.0	0.0
Defined Benefit Plan, Gross Prescription Drug Subsidy Receipts Received		0.0	0.0
Defined Benefit Plan, Foreign Currency Exchange Rate Changes, Plan Assets		(2.7)	(4.2)
Defined Benefit Plan, Benefits Paid		(8.4)	(5.6)
Defined Benefit Plan, Fair Value of Plan Assets		46.7	47.3	54.5
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Defined Benefit Plan, Benefit Obligation		93.4	103.6
Defined Benefit Plan, Service Cost		2.8	3.1	3.2
Defined Benefit Plan, Interest Cost		3.1	3.0	3.6
Defined Benefit Plan, Actuarial Gain (Loss)		9.4	(6.2)
Defined Benefit Plan, Contributions by Plan Participants		0.0	0.0
Defined Benefit Plan, Gross Prescription Drug Subsidy Receipts Received		0.0	0.0
Defined Benefit Plan, Foreign Currency Exchange Rate Gain (Loss)		(3.5)	(4.5)
Defined Benefit Plan, Benefits Paid from both Plan Assets and Company Assets		(8.4)	(5.6)
Defined Benefit Plan, Benefit Obligation		96.8	93.4	103.6
Defined Benefit Plan, Funded Status of Plan		(50.1)	(46.1)
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Net Gains (Losses), before Tax		23.4	19.4
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax		22.7	18.5
Defined Benefit Plan, Amortization of Gains (Losses)		0.7	0.9	0.8
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)		(0.2)	(0.2)	0.0
Defined Benefit Plan, Expected Return on Plan Assets		(1.9)	(2.5)	(3.2)
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Curtailments		0.0	0.0	0.1
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements		0.9	0.0	(2.2)
Defined Benefit Plan, Net Periodic Benefit Cost		5.4	4.3	2.3
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Gain (Loss), before Tax		6.9	(2.4)	7.8
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Prior Service Cost, before Tax		(0.7)	(0.9)
Pension and other post-retirement liability adjustments		(5.4)	3.1	(4.5)
Total recognized in net periodic benefit cost and other comprehensive income (loss) before tax		10.8	1.2	6.8
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Prior Service Cost Arising During Period, before Tax		0.0	0.0	(1.4)
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, before Tax		1.7	0.9	0.8
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Prior Service Costs Arising During Period, Net of Tax		0.2	0.2	0.0
Defined Benefit Plan, Effect of Settlements and Curtailments on Accumulated Benefit Obligation		0.0	0.0	(1.0)
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Prior Service cost Recognized as part of curtailment/settlement		$ 0.0	$ 0.0	$ (0.1)
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate		2.90%	3.30%	3.10%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase		2.70%	2.30%	2.30%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate		3.60%	3.70%	3.90%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets		4.30%	4.20%	4.20%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase		2.80%	2.80%	2.70%
Defined Benefit Plan, Expected Future Benefit Payments, Next Twelve Months	[1]	$ (22.8)
Defined Benefit Plan, Expected Future Benefit Payments, Year Two		(4.7)
Defined Benefit Plan, Expected Future Benefit Payments, Year Three		(4.3)
Defined Benefit Plan, Expected Future Benefit Payments, Year Four		(3.4)
Defined Benefit Plan, Expected Future Benefit Payments, Year Five		(3.9)
Defined Benefit Plan, Expected Future Benefit Payments, Five Fiscal Years Thereafter		(25.0)
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Administration Expenses		0.0	$ 0.0
Defined Benefit Plan, Amounts Recognized in Balance Sheet		46.0	66.2
Defined Benefit Plan, Current Assets		0.0	0.0
Defined Benefit Plan, Assets for Plan Benefits, Noncurrent		0.0	0.0
Employee benefit plan obligations		3.9	4.5
Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent		(42.1)	(61.7)
Pension and Other Postretirement Defined Benefit Plans, Liabilities		46.0	66.2
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Fair Value of Plan Assets		0.0	0.0
Defined Benefit Plan, Actual Return on Plan Assets		0.0	0.0
Defined Benefit Plan, Contributions by Employer		5.2	3.4
Defined Benefit Plan, Contributions by Plan Participants		2.3	2.7
Defined Benefit Plan, Gross Prescription Drug Subsidy Receipts Received		0.1	0.1
Defined Benefit Plan, Foreign Currency Exchange Rate Changes, Plan Assets		0.0	0.0
Defined Benefit Plan, Benefits Paid		(7.6)	(6.2)
Defined Benefit Plan, Fair Value of Plan Assets		0.0	0.0	$ 0.0
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Defined Benefit Plan, Benefit Obligation		66.2	73.7
Defined Benefit Plan, Service Cost		0.5	0.7	0.6
Defined Benefit Plan, Interest Cost		2.8	2.6	2.9
Defined Benefit Plan, Actuarial Gain (Loss)		(18.3)	(7.0)
Defined Benefit Plan, Contributions by Plan Participants		2.3	2.7
Defined Benefit Plan, Gross Prescription Drug Subsidy Receipts Received		0.1	0.1
Defined Benefit Plan, Foreign Currency Exchange Rate Gain (Loss)		0.0	(0.4)
Defined Benefit Plan, Benefit Obligation		46.0	66.2	73.7
Defined Benefit Plan, Funded Status of Plan		(46.0)	(66.2)
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Net Gains (Losses), before Tax		(28.4)	(10.9)
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax		(37.7)	(28.8)
Defined Benefit Plan, Amortization of Gains (Losses)		(0.8)	0.1	(0.5)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)		(8.6)	(9.0)	(9.1)
Defined Benefit Plan, Expected Return on Plan Assets		0.0	0.0	0.0
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Curtailments		0.0	0.0	0.0
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements		0.0	0.0	0.0
Defined Benefit Plan, Net Periodic Benefit Cost		(6.1)	(5.6)	(6.1)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Gain (Loss), before Tax		(18.3)	(7.0)	4.8
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Prior Service Cost, before Tax		(9.3)	(17.9)
Pension and other post-retirement liability adjustments		8.9	(1.9)	(13.7)
Total recognized in net periodic benefit cost and other comprehensive income (loss) before tax		(15.0)	(3.7)	7.6
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Prior Service Cost Arising During Period, before Tax		0.0	0.0	0.0
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, before Tax		(0.8)	0.1	0.2
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Prior Service Costs Arising During Period, Net of Tax		8.6	9.0	9.1
Defined Benefit Plan, Effect of Settlements and Curtailments on Accumulated Benefit Obligation		0.0	0.0	0.0
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Prior Service cost Recognized as part of curtailment/settlement		$ 0.0	$ 0.0	$ 0.0
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate		3.86%	4.34%	3.73%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate		4.29%	3.72%	4.32%
Non-Qualified Defined Benefit Pension Plan [Member] | United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Current Assets		$ 0.0	$ 0.0
Defined Benefit Plan, Assets for Plan Benefits, Noncurrent		0.0	0.0
Employee benefit plan obligations		3.5	3.4
Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent		(30.3)	(29.6)
Pension and Other Postretirement Defined Benefit Plans, Liabilities		33.8	33.0
Defined Benefit Plan, Accumulated Benefit Obligation		33.5	32.6
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Fair Value of Plan Assets		0.0
Defined Benefit Plan, Fair Value of Plan Assets		0.0	0.0
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Defined Benefit Plan, Benefit Obligation		(33.0)
Defined Benefit Plan, Benefit Obligation		(33.8)	(33.0)
Defined Benefit Plan, Funded Status of Plan		33.8	33.0
Qualified Defined Benefit Pension Plan [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Fair Value of Plan Assets		18.4
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Defined Benefit Plan, Benefit Obligation		(18.2)
Qualified Defined Benefit Pension Plan [Member] | United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Current Assets		0.0
Defined Benefit Plan, Assets for Plan Benefits, Noncurrent		0.0	0.0
Employee benefit plan obligations		0.0	0.0
Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent		0.0	(1.4)
Pension and Other Postretirement Defined Benefit Plans, Liabilities		0.0	1.4
Defined Benefit Plan, Accumulated Benefit Obligation		7.9	9.5
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Fair Value of Plan Assets		8.1
Defined Benefit Plan, Fair Value of Plan Assets		7.9	8.1
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Defined Benefit Plan, Benefit Obligation		(9.5)
Defined Benefit Plan, Benefit Obligation		(7.9)	(9.5)
Defined Benefit Plan, Funded Status of Plan		0.0	1.4
Qualified Defined Benefit Pension Plan [Member] | Foreign Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Current Assets		0.2	0.0
Defined Benefit Plan, Assets for Plan Benefits, Noncurrent		0.0	1.1
Employee benefit plan obligations		0.1	0.1
Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent		(16.4)	(12.7)
Pension and Other Postretirement Defined Benefit Plans, Liabilities		16.3	11.7
Defined Benefit Plan, Accumulated Benefit Obligation		51.0	47.2
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Fair Value of Plan Assets		39.2
Defined Benefit Plan, Fair Value of Plan Assets		38.8	39.2
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Defined Benefit Plan, Benefit Obligation		(50.9)
Defined Benefit Plan, Benefit Obligation		(55.1)	(50.9)
Defined Benefit Plan, Funded Status of Plan		16.3	$ 11.7
After Medicare Act Subsidy [Member] | Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Defined Benefit Plan, Expected Future Benefit Payments, Next Twelve Months	[1]	(4.0)
Defined Benefit Plan, Expected Future Benefit Payments, Year Two		(3.9)
Defined Benefit Plan, Expected Future Benefit Payments, Year Three		(3.8)
Defined Benefit Plan, Expected Future Benefit Payments, Year Four		(3.7)
Defined Benefit Plan, Expected Future Benefit Payments, Year Five		(3.6)
Defined Benefit Plan, Expected Future Benefit Payments, Five Fiscal Years Thereafter		$ (16.6)

[1] (1)The future benefit plan payments in 2018 include approximately $18 related to the annuitization of three qualified plans.