INCOME TAXES - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Feb. 27, 2021	Feb. 29, 2020	Feb. 23, 2019	Feb. 24, 2018
Deferred tax assets:
Compensation and benefits	$ 275.0	$ 135.7
Net operating loss	118.4	117.0
Pension & postretirement benefits	333.1	235.5
Self-Insurance	271.0	263.5
Tax credits	39.0	41.7
Lease obligations	1,785.7	1,728.2
Other	96.2	143.8
Gross deferred tax assets	2,918.4	2,665.4
Less: valuation allowance	(130.4)	(135.1)	$ (139.5)	$ (134.9)
Total deferred tax assets	2,788.0	2,530.3
Deferred tax liabilities:
Depreciation and amortization	1,233.7	1,249.1
Inventories	335.9	346.8
Operating lease assets	1,570.4	1,521.7
Other	181.7	26.5
Total deferred tax liabilities	3,321.7	3,144.1
Net deferred tax liability	(533.7)	(613.8)
Noncurrent deferred tax asset
Deferred tax liabilities:
Net deferred tax liability	0.0	0.0
Noncurrent deferred tax liability
Deferred tax liabilities:
Net deferred tax liability	$ (533.7)	$ (613.8)