LONG-TERM DEBT AND FINANCE LEASE OBLIGATIONS - Schedule of Long-term Debt (Details) - USD ($) $ in Millions	Jun. 20, 2026	Jun. 15, 2026	Feb. 28, 2026
Debt Instrument [Line Items]
Finance lease obligations	$ 408.1		$ 412.9
Total debt	9,162.8		8,946.6
Less current maturities	(746.1)		(534.0)
Long-term portion	8,416.7		8,412.6
Senior Unsecured Notes due 2028 to 2034, interest rate range of 3.50% to 6.50% | Senior Notes
Debt Instrument [Line Items]
Long-term debt, gross	$ 7,232.7		7,228.9
Senior Unsecured Notes due 2028 to 2034, interest rate range of 3.50% to 6.50% | Senior Notes | Minimum
Debt Instrument [Line Items]
Stated interest rate percentage	3.50%
Senior Unsecured Notes due 2028 to 2034, interest rate range of 3.50% to 6.50% | Senior Notes | Maximum
Debt Instrument [Line Items]
Stated interest rate percentage	6.50%
New Albertsons L.P. Notes due 2027 to 2031, interest rate range of 6.52% to 8.70% | Notes Payable
Debt Instrument [Line Items]
Long-term debt, gross	$ 434.4		489.3
New Albertsons L.P. Notes due 2027 to 2031, interest rate range of 6.52% to 8.70% | Notes Payable | Minimum
Debt Instrument [Line Items]
Stated interest rate percentage	6.52%
New Albertsons L.P. Notes due 2027 to 2031, interest rate range of 6.52% to 8.70% | Notes Payable | Maximum
Debt Instrument [Line Items]
Stated interest rate percentage	8.70%
Safeway Inc. Notes due 2027 to 2031, interest rate range of 7.25% to 7.45% | Notes Payable
Debt Instrument [Line Items]
Long-term debt, gross	$ 376.6		376.5
Safeway Inc. Notes due 2027 to 2031, interest rate range of 7.25% to 7.45% | Notes Payable | Minimum
Debt Instrument [Line Items]
Stated interest rate percentage	7.25%
Safeway Inc. Notes due 2027 to 2031, interest rate range of 7.25% to 7.45% | Notes Payable | Maximum
Debt Instrument [Line Items]
Stated interest rate percentage	7.45%
ABL Facility | Line of Credit
Debt Instrument [Line Items]
Long-term debt, gross	$ 700.0		425.0
Other financing obligations
Debt Instrument [Line Items]
Long-term debt, gross	$ 11.0		$ 14.0
New Albertsons L.P. Notes | Senior Notes
Debt Instrument [Line Items]
Stated interest rate percentage		7.75%