Employee Benefit Plan Obligations (Details) - USD ($) $ in Millions	12 Months Ended
	Feb. 22, 2019	Feb. 23, 2018	Feb. 24, 2017
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Obligation	$ 25.0	$ 23.9
Deferred Compensation Liability, Current and Noncurrent	55.7	55.2
Employee Benefit Plan Obligations, Total	178.7	169.5
Defined Benefit Plan, Assets for Plan Benefits	0.0	0.5
Employee benefit plan obligations	37.1	39.2
Liability, Defined Benefit Plan, Noncurrent	(141.6)	(130.8)
Liability, Defined Benefit Plan	178.7	170.0
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Fair Value of Plan Assets	33.1
Defined Benefit Plan, Plan Assets, Contributions by Employer	5.1
Defined Benefit Plan, Fair Value of Plan Assets	30.0	33.1
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax	(9.5)	(16.1)	$ (15.0)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Gain (Loss), before Tax	(3.7)	9.4
Pension and other post-retirement liability adjustments	(6.6)	1.1	4.7
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Prior Service Cost Arising During Period, before Tax	(1.0)
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, before Tax	(3.5)	(3.2)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Prior Service Costs Arising During Period, Net of Tax	(0.8)
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)
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Amortization of Gain (Loss), Next Fiscal Year	3.4	3.8
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Curtailment	0.0	0.0
Defined Benefit Plan, Plan Assets, Administration Expense	0.0	0.0
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position	40.7	43.4
Employee benefit plan obligations	3.4	3.5
Liability, Defined Benefit Plan, Noncurrent	(37.3)	(39.9)
Liability, Defined Benefit Plan	40.7	43.4
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, Plan Assets, Increase (Decrease) for Actual Return (Loss)	0.0	0.0
Defined Benefit Plan, Plan Assets, Contributions by Employer	3.6	3.4
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)	1.9	1.9
Defined Benefit Plan, Gross Prescription Drug Subsidy Receipts Received (Deprecated 2017-01-31)	0.0	0.1
Defined Benefit Plan, Plan Assets, Foreign Currency Translation Gain (Loss)	0.0	0.0
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	43.4	46.0
Defined Benefit Plan, Service Cost	0.1	0.2	0.5
Defined Benefit Plan, Interest Cost	1.6	1.7	2.8
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment	0.0	0.0
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	(0.8)	(1.2)
Defined Benefit Plan, Benefit Obligation, Foreign Currency Translation Gain (Loss)	0.0	0.1
Defined Benefit Plan, Benefits Paid from both Plan Assets and Company Assets	(5.5)	(5.4)
Defined Benefit Plan, Benefit Obligation	40.7	43.4	46.0
Defined Benefit Plan, Funded (Unfunded) Status of Plan	(40.7)	(43.4)
Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), Gain (Loss), before Tax	(22.9)	(26.0)
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax	(22.9)	(28.3)
Defined Benefit Plan, Amortization of Gain (Loss)	(3.8)	(3.7)	(0.8)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(2.2)	(7.0)	(8.6)
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	0.0	0.0	0.0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement	0.0	0.0	0.0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	(4.3)	(8.8)	(6.1)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Gain (Loss), before Tax	(0.8)	(1.2)	(18.3)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Prior Service Cost, before Tax	0.0	(2.3)
Pension and other post-retirement liability adjustments	(5.3)	(9.5)	8.9
Total recognized in net periodic benefit cost and other comprehensive income (loss) before tax	1.0	0.7	(15.0)
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	(3.8)	(3.7)	(0.8)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Prior Service Costs Arising During Period, Net of Tax	2.2	7.0	8.6
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, Other Changes, before Tax	$ 0.1	$ 0.0	$ 0.0
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	4.08%	3.97%	3.86%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	3.95%	3.84%	4.29%
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Amortization of Gain (Loss), Next Fiscal Year	$ (0.4)	$ (0.3)
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Curtailment	0.0	(0.1)
Defined Benefit Plan, Plan Assets, Administration Expense	0.0	(0.2)
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position	57.3	47.0
Employee benefit plan obligations	4.2	3.9
Liability, Defined Benefit Plan, Noncurrent	(42.0)	(43.6)
Liability, Defined Benefit Plan	46.2	47.0
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Fair Value of Plan Assets	33.1	46.7
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)	0.3	2.4
Defined Benefit Plan, Plan Assets, Contributions by Employer	4.3	4.5
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)	0.0	0.0
Defined Benefit Plan, Gross Prescription Drug Subsidy Receipts Received (Deprecated 2017-01-31)	0.0	0.0
Defined Benefit Plan, Plan Assets, Foreign Currency Translation Gain (Loss)	(2.0)	3.6
Defined Benefit Plan, Fair Value of Plan Assets	30.0	33.1	$ 46.7
Defined Benefit Plan, Plan Assets, Benefits Paid	5.7	23.9
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Defined Benefit Plan, Benefit Obligation	80.1	96.8
Defined Benefit Plan, Service Cost	2.2	2.7	2.8
Defined Benefit Plan, Interest Cost	2.1	2.1	3.1
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment	1.0	0.0
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	(0.2)	(3.3)
Defined Benefit Plan, Benefit Obligation, Foreign Currency Translation Gain (Loss)	(3.3)	5.8
Defined Benefit Plan, Benefits Paid from both Plan Assets and Company Assets	(5.7)	(23.9)
Defined Benefit Plan, Benefit Obligation	76.2	80.1	96.8
Defined Benefit Plan, Funded (Unfunded) Status of Plan	(46.2)	(47.0)
Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), Gain (Loss), before Tax	12.8	12.7
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax	13.4	12.2
Defined Benefit Plan, Amortization of Gain (Loss)	0.3	0.5	0.7
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(0.2)	(0.2)	(0.2)
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(1.5)	(1.4)	(1.9)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement	0.0	7.1	0.9
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	2.9	10.8	5.4
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Gain (Loss), before Tax	1.0	(4.3)	6.9
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Prior Service Cost, before Tax	0.6	(0.5)
Pension and other post-retirement liability adjustments	(1.9)	11.9	(5.4)
Total recognized in net periodic benefit cost and other comprehensive income (loss) before tax	4.8	(1.1)	10.8
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Prior Service Cost Arising During Period, before Tax	1.0	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	0.3	0.5	1.7
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Prior Service Costs Arising During Period, Net of Tax	0.2	0.2	0.2
Defined Benefit Plan, Effect of Settlements and Curtailments on Accumulated Benefit Obligation	0.0	(7.3)	0.0
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Other Changes, before Tax	$ 0.0	$ 0.0	$ 0.0
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	2.90%	2.90%	2.90%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase	3.60%	3.60%	2.70%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	2.90%	2.80%	3.60%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	4.60%	4.80%	4.30%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase	3.40%	3.50%	2.80%
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	$ (5.1)
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	(3.6)
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	(3.4)
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	(4.2)
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	(5.1)
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	(23.0)
Non-Qualified Defined Benefit Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Employee benefit plan obligations	3.8	$ 3.8
Liability, Defined Benefit Plan, Noncurrent	(27.7)	(28.8)
Liability, Defined Benefit Plan	31.5	32.6
Defined Benefit Plan, Accumulated Benefit Obligation	31.3	32.4
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	32.6
Defined Benefit Plan, Benefit Obligation	31.5	32.6
Defined Benefit Plan, Funded (Unfunded) Status of Plan	31.5	32.6
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 Payment, Next Twelve Months	(3.6)
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	(3.5)
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	(3.5)
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	(3.5)
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	(3.4)
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	(15.2)
Long term asset [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assets for Plan Benefits	0.0	0.5
Long term asset [Member] | Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assets for Plan Benefits	0.0	0.0
Long term asset [Member] | Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assets for Plan Benefits	0.0	0.5
Long term asset [Member] | Non-Qualified Defined Benefit Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assets for Plan Benefits	0.0	0.0
Foreign Plan [Member] | Qualified Defined Benefit Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Employee benefit plan obligations	0.4	0.1
Liability, Defined Benefit Plan, Noncurrent	(14.3)	(14.8)
Liability, Defined Benefit Plan	14.7	14.4
Defined Benefit Plan, Accumulated Benefit Obligation	23.7	42.5
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Fair Value of Plan Assets	33.1
Defined Benefit Plan, Fair Value of Plan Assets	30.0	33.1
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Defined Benefit Plan, Benefit Obligation	47.5
Defined Benefit Plan, Benefit Obligation	44.7	47.5
Defined Benefit Plan, Funded (Unfunded) Status of Plan	14.7	14.4
Foreign Plan [Member] | Long term asset [Member] | Qualified Defined Benefit Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assets for Plan Benefits	$ 0.0	$ 0.5