BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) $ / shares in Units, $ in Millions	3 Months Ended		4 Months Ended	6 Months Ended
	Sep. 07, 2024 USD ($) format $ / shares shares	Sep. 09, 2023 USD ($)	Jun. 17, 2023 USD ($)	Sep. 07, 2024 USD ($) division segment format $ / shares shares	Sep. 09, 2023 USD ($)	Feb. 24, 2024 USD ($) $ / shares shares
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Restricted cash	$ 4.2			$ 4.2		$ 4.5
LIFO expense	4.8	$ 26.2		19.4	$ 60.2
Income tax expense	$ 41.0	$ 67.5		$ 110.2	$ 133.6
Effective tax rate	22.00%	20.20%		22.20%	16.30%
Reduction of reserve			$ 49.7
Number of divisions | division				12
Number of reportable segments | segment				1
Number of store format | format	1			1
Receivables, net	$ 897.6			$ 897.6		724.4
Contract liability related to gift cards	97.3			97.3		111.4
Pharmacy
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Receivables, net	$ 490.4			$ 490.4		$ 376.1
Class A-1 convertible common stock
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Common stock, shares authorized (in shares) | shares	150,000,000			150,000,000		150,000,000
Common stock, par value (in dollars per share) | $ / shares	$ 0.01			$ 0.01		$ 0.01
Common stock shares issued (in shares) | shares	0			0		0
Convertible Preferred Stock
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Preferred stock, shares authorized (in shares) | shares	100,000,000			100,000,000		100,000,000
Preferred stock, par value (in dollars per share) | $ / shares	$ 0.01			$ 0.01		$ 0.01
Series A Convertible Preferred Stock
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Preferred stock, shares authorized (in shares) | shares	1,750,000			1,750,000		1,750,000
Series A-1 Convertible Preferred Stock
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Preferred stock, shares authorized (in shares) | shares	1,410,000			1,410,000		1,410,000
Undesignated preferred stock
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Preferred stock, shares issued (in shares) | shares	0			0		0
EI Rancho
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Proceeds from sale of equity method investments			166.1
Income from equity method investments			$ 10.5
EI Rancho
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Ownership interest percentage			45.00%