INTANGIBLE ASSETS - Schedule of Intangible Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Feb. 25, 2023	Feb. 26, 2022
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 4,976.7	$ 4,551.1
Accumulated amortization	(2,597.5)	(2,354.1)
Total	2,379.2	2,197.0
Liquor licenses and restricted covenants	86.2	88.0
Total intangible assets, gross	5,062.9	4,639.1
Total intangible assets, net	$ 2,465.4	2,285.0
Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives (Years)	3 years
Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives (Years)	40 years
Trade names
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives (Years)	40 years
Gross carrying amount	$ 1,935.8	1,935.8
Accumulated amortization	(410.5)	(361.9)
Total	$ 1,525.3	1,573.9
Customer prescription files
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives (Years)	5 years
Gross carrying amount	$ 1,405.3	1,430.8
Accumulated amortization	(1,381.6)	(1,375.8)
Total	23.7	55.0
Internally developed software
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	1,570.1	1,126.3
Accumulated amortization	(747.4)	(564.3)
Total	$ 822.7	562.0
Internally developed software | Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives (Years)	3 years
Internally developed software | Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives (Years)	5 years
Other intangible assets
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 65.5	58.2
Accumulated amortization	(58.0)	(52.1)
Total	$ 7.5	$ 6.1
Other intangible assets | Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives (Years)	3 years
Other intangible assets | Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives (Years)	6 years