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Property and Equipment - Schedule of property and equipment (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Jul. 31, 2021 | Jul. 31, 2020
Property, Plant and Equipment [Line Items] |  |
Equipment | $ 199 | $ 226
Computer software | 899 | 870
Furniture and fixtures | 96 | 93
Leasehold improvements | 350 | 298
Land | 79 | 79
Buildings | 375 | 372
Capital in progress | 122 | 90
Total property plant and equipment, gross | 2,120 | 2,028
Less accumulated depreciation and amortization | (1,340) | (1,294)
Total property and equipment, net | $ 780 | $ 734
Minimum |  |
Property, Plant and Equipment [Line Items] |  |
Life in years | 2 years |
Maximum |  |
Property, Plant and Equipment [Line Items] |  |
Life in years | 30 years |
Equipment | Minimum |  |
Property, Plant and Equipment [Line Items] |  |
Life in years | 3 years |
Equipment | Maximum |  |
Property, Plant and Equipment [Line Items] |  |
Life in years | 5 years |
Computer software | Minimum |  |
Property, Plant and Equipment [Line Items] |  |
Life in years | 2 years |
Computer software | Maximum |  |
Property, Plant and Equipment [Line Items] |  |
Life in years | 6 years |
Furniture and fixtures |  |
Property, Plant and Equipment [Line Items] |  |
Life in years | 5 years |
Leasehold improvements | Minimum |  |
Property, Plant and Equipment [Line Items] |  |
Life in years | 2 years |
Leasehold improvements | Maximum |  |
Property, Plant and Equipment [Line Items] |  |
Life in years | 16 years |
Buildings | Minimum |  |
Property, Plant and Equipment [Line Items] |  |
Life in years | 5 years |
Buildings | Maximum |  |
Property, Plant and Equipment [Line Items] |  |
Life in years | 30 years |

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- Definition Amount before accumulated depreciation of building structures held for productive use including addition, improvement, or renovation to the structure, including, but not limited to, interior masonry, interior flooring, electrical, and plumbing. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 4 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=124098289&loc=d3e6812-107765 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
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