BENEFIT PLANS - Fair Value of Plan Assets (Details) - USD ($) $ in Millions	Jul. 29, 2023	Jul. 30, 2022	Jul. 31, 2021
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at end of year	$ 1,559	$ 1,716
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at end of year	1,559	1,716	$ 2,118
Benefit obligation at end of year	(1,545)	(1,706)	$ (2,093)
Funded (unfunded) status at end of year	14	10
SUPERVALU INC. Retirement Plan | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at end of year	1,559	1,716
Benefit obligation at end of year	(1,539)	(1,698)
Funded (unfunded) status at end of year	20	18
Other Pension Plan | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at end of year	0	0
Benefit obligation at end of year	(6)	(8)
Funded (unfunded) status at end of year	$ (6)	$ (8)