DESCRIPTION OF BUSINESS, BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Recently Issues Accounting Standards (Details) - USD ($) $ in Millions	Feb. 27, 2021	Feb. 29, 2020	Sep. 07, 2019	Feb. 24, 2019	Feb. 23, 2019	Feb. 24, 2018
Sale Leaseback Transaction [Line Items]
Operating lease right-of-use assets	$ 6,015.6	$ 5,867.4	$ 602.5
Operating lease liability	6,153.3
Retained earnings	1,324.3	$ 2,278.1			$ 1,450.7	$ 1,398.2
Employer-paid portion of social security taxes deferred	$ 426.6
Accounting Standards Update 2016-02
Sale Leaseback Transaction [Line Items]
Operating lease right-of-use assets				$ 5,300.0
Operating lease liability				5,400.0
Cumulative effect adjustment				776.0
Retained earnings				574.6
Accounting Standards Update 2016-02, Deferred Gains On Sale-Leaseback
Sale Leaseback Transaction [Line Items]
Cumulative effect adjustment				(865.8)
Accounting Standards Update 2016-02, Impairment Loss
Sale Leaseback Transaction [Line Items]
Cumulative effect adjustment				(87.3)
Accounting Standards Update 2016-02, Assets
Sale Leaseback Transaction [Line Items]
Cumulative effect adjustment				(17.2)
Accounting Standards Update 2016-02, Liabilities
Sale Leaseback Transaction [Line Items]
Cumulative effect adjustment				$ (14.7)