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LEASES - Lease Cost (Details) - USD ($)
$ in Millions
 12 Months Ended
Jul. 31, 2021
Aug. 01, 2020
Lessee, Lease, Description [Line Items]    
Net operating lease cost $ 291 $ 374
Finance lease cost 32 28
Total net lease cost 323 402
Discontinued Operations    
Lessee, Lease, Description [Line Items]    
Net operating lease cost 2 6
Operating expenses    
Lessee, Lease, Description [Line Items]    
Operating lease cost 229 223
Short-term lease cost 29 31
Variable lease cost 64 151
Sublease income (8) (3)
Amortization of leased assets 13 16
Net sales    
Lessee, Lease, Description [Line Items]    
Sublease income (20) (23)
Interest expense, net    
Lessee, Lease, Description [Line Items]    
Interest on lease liabilities 19 12
Restructuring, acquisition and integration related expenses    
Lessee, Lease, Description [Line Items]    
Sublease income (33) (41)
Other sublease income, net (3) (5)
Lease expense $ 31 $ 36