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GOODWILL AND INTANGIBLE ASSETS, NET - Identifiable Intangible Assets (Details) - USD ($)
$ in Millions
Jul. 31, 2021
Aug. 01, 2020
Amortizing intangible assets:    
Gross Carrying Amount $ 1,131 $ 1,145
Accumulated Amortization 296 231
Net 835 914
Intangibles assets, net    
Gross Carrying Amount 1,187 1,201
Accumulated Amortization 296 231
Net 891 970
Trademarks and tradenames    
Amortizing intangible assets:    
Indefinite lived intangible assets 56 56
Customer relationships    
Amortizing intangible assets:    
Gross Carrying Amount 1,007 1,007
Accumulated Amortization 234 173
Net 773 834
Intangibles assets, net    
Accumulated Amortization 234 173
Pharmacy prescription files    
Amortizing intangible assets:    
Gross Carrying Amount 33 33
Accumulated Amortization 13 8
Net 20 25
Intangibles assets, net    
Accumulated Amortization 13 8
Non-compete agreements    
Amortizing intangible assets:    
Gross Carrying Amount 0 13
Accumulated Amortization 0 12
Net 0 1
Intangibles assets, net    
Accumulated Amortization 0 12
Operating lease intangibles    
Amortizing intangible assets:    
Gross Carrying Amount 7 8
Accumulated Amortization 4 4
Net 3 4
Intangibles assets, net    
Accumulated Amortization 4 4
Trademarks and tradenames    
Amortizing intangible assets:    
Gross Carrying Amount 84 84
Accumulated Amortization 45 34
Net 39 50
Intangibles assets, net    
Accumulated Amortization $ 45 $ 34