INCOME TAXES - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Feb. 23, 2019	Feb. 24, 2018	Feb. 25, 2017	Feb. 27, 2016
Deferred tax assets:
Compensation and benefits	$ 132.0	$ 122.3
Net operating loss	165.9	160.5
Pension & postretirement benefits	195.6	194.7
Reserves	1.5	6.3
Self-Insurance	259.7	265.1
Tax credits	64.2	57.4
Other	58.7	59.3
Gross deferred tax assets	877.6	865.6
Less: valuation allowance	(139.5)	(134.9)	$ (387.6)	$ (286.8)
Total deferred tax assets	738.1	730.7
Deferred tax liabilities:
Debt discounts	62.8	73.7
Depreciation and amortization	876.1	903.5
Inventories	346.5	322.9
Other	14.1	10.5
Total deferred tax liabilities	1,299.5	1,310.6
Net deferred tax liability	(561.4)	(579.9)
Noncurrent deferred tax asset	0.0	0.0
Noncurrent deferred tax liability	(561.4)	(579.9)
Total	$ (561.4)	$ (579.9)