BENEFIT PLANS - Defined Benefit Pension Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Jul. 30, 2022	Jul. 31, 2021	Aug. 01, 2020
Changes in Plan Assets
Fair value of plan assets at beginning of year	$ 2,118
Fair value of plan assets at end of year	$ 1,716	$ 2,118
SUPERVALU INC. Retirement Plan
Changes in Plan Assets
Change in discount rate (as a percent)	1.58%	0.35%
Pension Benefits
Changes in Benefit Obligation
Benefit Obligation at beginning of year	$ 2,093	$ 2,260
Actuarial gain	(322)	(103)
Benefits paid	(103)	(101)
Interest cost	38	37	$ 57
Settlements paid	0	0
Plan amendment	0	0
Benefit obligation at end of year	1,706	2,093	2,260
Changes in Plan Assets
Fair value of plan assets at beginning of year	2,118	1,991
Actual return on plan assets	(300)	226
Benefits paid	(103)	(101)
Settlements paid	0	0
Employer contributions	1	2
Fair value of plan assets at end of year	1,716	2,118	1,991
Funded (unfunded) status at end of year	10	25
Pension Benefits | SUPERVALU INC. Retirement Plan
Changes in Benefit Obligation
Benefit Obligation at beginning of year	1,796
Benefit obligation at end of year	1,698	1,796
Changes in Plan Assets
Fair value of plan assets at beginning of year	1,860
Fair value of plan assets at end of year	1,716	1,860
Funded (unfunded) status at end of year	18	64
Pension Benefits | Other Pension Plan
Changes in Benefit Obligation
Benefit Obligation at beginning of year	297
Benefit obligation at end of year	8	297
Changes in Plan Assets
Fair value of plan assets at beginning of year	258
Fair value of plan assets at end of year	0	258
Funded (unfunded) status at end of year	(8)	(39)
Other Postretirement Benefits
Changes in Benefit Obligation
Benefit Obligation at beginning of year	18	37
Actuarial gain	(4)	(9)
Benefits paid	(1)	(3)
Interest cost	0	0	1
Settlements paid	(1)	(18)
Plan amendment	0	11
Benefit obligation at end of year	12	18	37
Changes in Plan Assets
Fair value of plan assets at beginning of year	0	12
Actual return on plan assets	0	0
Benefits paid	(1)	(3)
Settlements paid	(1)	(18)
Employer contributions	2	9
Fair value of plan assets at end of year	0	0	$ 12
Funded (unfunded) status at end of year	$ (12)	$ (18)