QUARTERLY INFORMATION (unaudited) - Narrative (Details) $ in Millions	3 Months Ended		12 Months Ended
	Feb. 27, 2021 USD ($)	Sep. 07, 2019 USD ($) transaction	Feb. 27, 2021 USD ($)
Interim Period, Costs Not Allocable [Line Items]
Non-cash pre-tax charge			$ 607.2
Gain on sale		$ 463.6
Number of sale leaseback transactions | transaction		3
Variable Annuity Pension Plan (VAPP)
Interim Period, Costs Not Allocable [Line Items]
Non-cash pre-tax charge	$ 285.7		$ 4.0