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Revenue (Tables) | 3 Months Ended
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Oct. 29, 2022
Revenue from Contract with Customer [Abstract] |
Disaggregation of Revenue | The following table presents this disaggregation of revenue (in millions):
| Three Months Ended
| October 29, 2022 |  | October 30, 2021
Product revenue: |  |  |
Secure, Agile Networks | $ | 6,684 |  |  | $ | 5,968 |
Internet for the Future | 1,310 |  |  | 1,373 |
Collaboration | 1,086 |  |  | 1,109 |
End-to-End Security | 971 |  |  | 895 |
Optimized Application Experiences | 193 |  |  | 181 |
Other Products | 2 |  |  | 3 |
Total Product | 10,245 |  |  | 9,529 |
Services | 3,387 |  |  | 3,371 |
Total | $ | 13,632 |  |  | $ | 12,900 |
The following table presents revenue for groups of similar products and services (in millions):
| Three Months Ended
| October 29, 2022 |  | October 30, 2021
Revenue: |  |  |
Secure, Agile Networks | $ | 6,684 |  |  | $ | 5,968 |
Internet for the Future | 1,310 |  |  | 1,373 |
Collaboration | 1,086 |  |  | 1,109 |
End-to-End Security | 971 |  |  | 895 |
Optimized Application Experiences | 193 |  |  | 181 |
Other Products | 2 |  |  | 3 |
Total Product | 10,245 |  |  | 9,529 |
Services | 3,387 |  |  | 3,371 |
Total | $ | 13,632 |  |  | $ | 12,900 |
Allowance for Credit Loss for Accounts Receivable | The allowances for credit loss for our accounts receivable are summarized as follows (in millions):
| Three Months Ended
| October 29, 2022 |  | October 30, 2021
Allowance for credit loss at beginning of period | $ | 83 |  |  | $ | 109 |
Provisions (benefits) | 11 |  |  | 19 |
Recoveries (write-offs), net | (6) |  |  | (14) |
Allowance for credit loss at end of period | $ | 88 |  |  | $ | 114 |
Schedule of Gross Contract Assets by Internal Risk Ratings | Gross contract assets by our internal risk ratings are summarized as follows (in millions):
| October 29, 2022 |  | July 30, 2022
1 to 4 | $ | 356 |  |  | $ | 414 |
5 to 6 | 898 |  |  | 814 |
7 and Higher | 87 |  |  | 158 |
Total | $ | 1,341 |  |  | $ | 1,386 |

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- Definition Tabular disclosure of allowance for credit loss on accounts receivable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 + Details
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