Employee Benefit Plan Obligations (Details) - USD ($) $ in Millions	12 Months Ended
	Feb. 26, 2021	Feb. 28, 2020	Feb. 22, 2019
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Obligation	$ 12.1	$ 28.1
Deferred Compensation Liability, Current and Noncurrent	60.5	58.8
Employee Benefit Plan Obligations, Total	177.8	193.0
Employee benefit plan obligations	24.9	44.7
Liability, Defined Benefit Plan, Noncurrent	(152.9)	(148.3)
Liability, Defined Benefit Plan	177.8	193.0
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Plan Assets, Amount	31.3
Defined Benefit Plan, Plan Assets, Contributions by Employer	4.2
Defined Benefit Plan, Plan Assets, Amount	33.2	31.3
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax	(11.7)	(7.4)	$ 9.5
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Gain (Loss), before Tax	(2.8)	(16.9)
Pension and other post-retirement liability adjustments	(4.3)	(16.9)	(6.6)
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, before Tax	(1.1)	(3.0)
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position	42.7	44.3
Employee benefit plan obligations	3.6	3.3
Liability, Defined Benefit Plan, Noncurrent	(39.1)	(41.0)
Liability, Defined Benefit Plan	42.7	44.3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Plan Assets, Amount	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	3.5	4.0
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)	2.3	1.9
Defined Benefit Plan, Plan Assets, Foreign Currency Translation Gain (Loss)	0.0	0.0
Defined Benefit Plan, Plan Assets, Amount	0.0	0.0	0.0
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Defined Benefit Plan, Benefit Obligation	44.3	40.7
Defined Benefit Plan, Service Cost	0.1	0.1	0.1
Defined Benefit Plan, Interest Cost	1.1	1.6	1.6
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment	0.0	0.0
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	0.5	5.9
Defined Benefit Plan, Benefit Obligation, Foreign Currency Translation Gain (Loss)	0.2	0.0
Defined Benefit Plan, Benefits Paid from both Plan Assets and Company Assets	(5.8)	(5.9)
Defined Benefit Plan, Benefit Obligation	42.7	44.3	40.7
Defined Benefit Plan, Funded (Unfunded) Status of Plan	(42.7)	(44.3)
Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), Gain (Loss), before Tax	(11.1)	(13.6)
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax	(11.1)	(13.6)
Defined Benefit Plan, Amortization of Gain (Loss)	(2.1)	(3.3)	(3.8)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	0.0	0.0	(2.2)
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	0.0	0.0	0.0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	(0.9)	(1.6)	$ (4.3)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Prior Service Cost, before Tax	$ 0.0	$ 0.0
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	2.58%	2.58%	4.08%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	2.56%	4.06%	3.95%
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position	$ 62.5	$ 61.8
Employee benefit plan obligations	3.3	2.9
Liability, Defined Benefit Plan, Noncurrent	(49.4)	(48.3)
Liability, Defined Benefit Plan	52.7	51.2
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Plan Assets, Amount	31.3	30.0
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)	(0.3)	1.6
Defined Benefit Plan, Plan Assets, Contributions by Employer	4.1	4.9
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)	0.0	0.0
Defined Benefit Plan, Plan Assets, Foreign Currency Translation Gain (Loss)	2.9	(0.3)
Defined Benefit Plan, Plan Assets, Amount	33.2	31.3	$ 30.0
Defined Benefit Plan, Plan Assets, Benefits Paid	4.8	4.9
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Defined Benefit Plan, Benefit Obligation	82.5	76.2
Defined Benefit Plan, Service Cost	1.9	1.8	2.2
Defined Benefit Plan, Interest Cost	1.3	2.0	2.1
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment	0.1	0.0
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	0.0	8.2
Defined Benefit Plan, Benefit Obligation, Foreign Currency Translation Gain (Loss)	4.9	(0.8)
Defined Benefit Plan, Benefits Paid from both Plan Assets and Company Assets	(4.8)	(4.9)
Defined Benefit Plan, Benefit Obligation	85.9	82.5	76.2
Defined Benefit Plan, Funded (Unfunded) Status of Plan	(52.7)	(51.2)
Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), Gain (Loss), before Tax	21.9	20.3
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax	22.8	21.0
Defined Benefit Plan, Amortization of Gain (Loss)	1.1	0.4	0.3
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	0.0	(0.1)	(0.2)
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(0.9)	(1.3)	(1.5)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	3.4	2.8	$ 2.9
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Prior Service Cost, before Tax	$ 0.9	$ 0.7
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	1.70%	1.70%	2.90%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase	3.50%	3.50%	3.60%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	1.70%	2.70%	2.90%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	3.00%	3.00%	4.60%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase	3.40%	3.50%	3.40%
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	$ 4.2
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	4.8
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	4.9
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	4.4
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	5.2
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	21.7
Non-Qualified Defined Benefit Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Employee benefit plan obligations	3.0	$ 2.8
Liability, Defined Benefit Plan, Noncurrent	(29.2)	(30.2)
Liability, Defined Benefit Plan	32.2	33.0
Defined Benefit Plan, Accumulated Benefit Obligation	32.1	32.9
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Plan Assets, Amount	0.0
Defined Benefit Plan, Plan Assets, Amount	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	32.2	33.0
Defined Benefit Plan, Funded (Unfunded) Status of Plan	32.2	33.0
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	3.4
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	3.3
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	3.2
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	13.8
Foreign Plan [Member] | Qualified Defined Benefit Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Employee benefit plan obligations	0.3	0.1
Liability, Defined Benefit Plan, Noncurrent	(20.2)	(18.1)
Liability, Defined Benefit Plan	20.5	18.2
Defined Benefit Plan, Accumulated Benefit Obligation	48.5	44.6
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Plan Assets, Amount	31.3
Defined Benefit Plan, Plan Assets, Amount	33.2	31.3
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Defined Benefit Plan, Benefit Obligation	49.5
Defined Benefit Plan, Benefit Obligation	53.7	49.5
Defined Benefit Plan, Funded (Unfunded) Status of Plan	$ 20.5	$ 18.2