GOODWILL AND INTANGIBLE ASSETS - Identifiable Intangible Assets (Details) - USD ($) $ in Thousands	Aug. 01, 2020	Aug. 03, 2019
Amortizing intangible assets:
Gross Carrying Amount	$ 1,144,811	$ 1,168,692
Accumulated Amortization	231,024	134,659
Net	913,787	1,034,033
Intangibles assets, net
Gross Carrying Amount	1,200,624	1,224,505
Accumulated Amortization	231,024	134,659
Net	969,600	1,089,846
Customer relationships
Amortizing intangible assets:
Gross Carrying Amount	1,007,118	1,007,089
Accumulated Amortization	172,832	111,940
Net	834,286	895,149
Pharmacy prescription files
Amortizing intangible assets:
Gross Carrying Amount	32,900	32,900
Accumulated Amortization	7,964	0
Net	24,936	32,900
Noncompete Agreements
Amortizing intangible assets:
Gross Carrying Amount	12,900	12,900
Accumulated Amortization	11,500	6,237
Net	1,400	6,663
Operating lease intangibles
Amortizing intangible assets:
Gross Carrying Amount	8,193	32,103
Accumulated Amortization	4,020	2,321
Net	4,173	29,782
Trademarks and tradenames
Amortizing intangible assets:
Gross Carrying Amount	83,700	83,700
Accumulated Amortization	34,708	14,161
Net	48,992	69,539
Trademarks and tradenames
Indefinite lived intangible assets:
Gross Carrying Amount	55,813	55,813
Accumulated Amortization	0	0
Net	$ 55,813	$ 55,813