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Revenue (Tables) | 12 Months Ended
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Jul. 29, 2023
Revenue from Contract with Customer [Abstract] |
Disaggregation of Revenue | The following table presents this disaggregation of revenue (in millions):
Years Ended | July 29, 2023 |  | July 30, 2022 |  | July 31, 2021
Product revenue: |  |  |  |  |
Secure, Agile Networks | $ | 29,105 |  |  | $ | 23,831 |  |  | $ | 22,725 |
Internet for the Future | 5,306 |  |  | 5,276 |  |  | 4,511 |
Collaboration | 4,052 |  |  | 4,472 |  |  | 4,727 |
End-to-End Security | 3,859 |  |  | 3,699 |  |  | 3,382 |
Optimized Application Experiences | 811 |  |  | 729 |  |  | 654 |
Other Products | 9 |  |  | 11 |  |  | 15 |
Total Product | 43,142 |  |  | 38,018 |  |  | 36,014 |
Services | 13,856 |  |  | 13,539 |  |  | 13,804 |
Total | $ | 56,998 |  |  | $ | 51,557 |  |  | $ | 49,818 |
The following table presents revenue for groups of similar products and services (in millions):
Years Ended | July 29, 2023 |  | July 30, 2022 |  | July 31, 2021
Revenue: |  |  |  |  |
Secure, Agile Networks | $ | 29,105 |  |  | $ | 23,831 |  |  | $ | 22,725 |
Internet for the Future | 5,306 |  |  | 5,276 |  |  | 4,511 |
Collaboration | 4,052 |  |  | 4,472 |  |  | 4,727 |
End-to-End Security | 3,859 |  |  | 3,699 |  |  | 3,382 |
Optimized Application Experiences | 811 |  |  | 729 |  |  | 654 |
Other Products | 9 |  |  | 11 |  |  | 15 |
Total Product | 43,142 |  |  | 38,018 |  |  | 36,014 |
Services | 13,856 |  |  | 13,539 |  |  | 13,804 |
Total | $ | 56,998 |  |  | $ | 51,557 |  |  | $ | 49,818 |
Allowance for Credit Loss for Accounts Receivable | The allowances for credit loss for our accounts receivable are summarized as follows (in millions):
|  | July 29, 2023 |  | July 30, 2022 |  | July 31, 2021
Allowance for credit loss at beginning of fiscal year |  | $ | 83 |  |  | $ | 109 |  |  | $ | 143 |
Provisions (benefits) |  | 39 |  |  | 64 |  |  | 21 |
Recoveries (write-offs), net |  | (37) |  |  | (81) |  |  | (29) |
Foreign exchange and other |  | — |  |  | (9) |  |  | (26) |
Allowance for credit loss at end of fiscal year |  | $ | 85 |  |  | $ | 83 |  |  | $ | 109 |
Schedule of Gross Contract Assets by Internal Risk Ratings | Gross contract assets by our internal risk ratings are summarized as follows (in millions):
| July 29, 2023 |  | July 30, 2022
1 to 4 | $ | 672 |  |  | $ | 414 |
5 to 6 | 954 |  |  | 814 |
7 and Higher | 60 |  |  | 158 |
Total | $ | 1,686 |  |  | $ | 1,386 |

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