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Revenue (Tables) | 12 Months Ended
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Jul. 30, 2022
Revenue from Contract with Customer [Abstract] |
Disaggregation of Revenue | The following table presents this disaggregation of revenue (in millions):
Years Ended | July 30, 2022 |  | July 31, 2021 |  | July 25, 2020
Product revenue: |  |  |  |  |
Secure, Agile Networks | $ | 23,829 |  |  | $ | 22,722 |  |  | $ | 23,265 |
Internet for the Future | 5,278 |  |  | 4,514 |  |  | 4,180 |
Collaboration | 4,472 |  |  | 4,727 |  |  | 4,823 |
End-to-End Security | 3,699 |  |  | 3,382 |  |  | 3,158 |
Optimized Application Experiences | 729 |  |  | 654 |  |  | 524 |
Other Products | 11 |  |  | 15 |  |  | 28 |
Total Product | 38,018 |  |  | 36,014 |  |  | 35,978 |
Services | 13,539 |  |  | 13,804 |  |  | 13,323 |
Total | $ | 51,557 |  |  | $ | 49,818 |  |  | $ | 49,301 |
The following table presents revenue for groups of similar products and services (in millions):
Years Ended | July 30, 2022 |  | July 31, 2021 |  | July 25, 2020
Revenue: |  |  |  |  |
Secure, Agile Networks | $ | 23,829 |  |  | $ | 22,722 |  |  | $ | 23,265 |
Internet for the Future | 5,278 |  |  | 4,514 |  |  | 4,180 |
Collaboration | 4,472 |  |  | 4,727 |  |  | 4,823 |
End-to-End Security | 3,699 |  |  | 3,382 |  |  | 3,158 |
Optimized Application Experiences | 729 |  |  | 654 |  |  | 524 |
Other Products | 11 |  |  | 15 |  |  | 28 |
Total Product | 38,018 |  |  | 36,014 |  |  | 35,978 |
Services | 13,539 |  |  | 13,804 |  |  | 13,323 |
Total | $ | 51,557 |  |  | $ | 49,818 |  |  | $ | 49,301 |
Allowance for Credit Loss for Accounts Receivable | The allowances for credit loss for our accounts receivable are summarized as follows (in millions):
|  | July 30, 2022 |  | July 31, 2021 |  | July 25, 2020
Allowance for credit loss at beginning of fiscal year |  | $ | 109 |  |  | $ | 143 |  |  | $ | 136 |
Provisions (benefits) |  | 64 |  |  | 21 |  |  | 55 |
Recoveries (write-offs), net |  | (81) |  |  | (29) |  |  | (48) |
Foreign exchange and other |  | (9) |  |  | (26) |  |  | — |
Allowance for credit loss at end of fiscal year |  | $ | 83 |  |  | $ | 109 |  |  | $ | 143 |
Schedule of Gross Contract Assets by Internal Risk Ratings | Gross contract assets by our internal risk ratings are summarized as follows (in millions):
| July 30, 2022 |  | July 31, 2021
1 to 4 | $ | 414 |  |  | $ | 521 |
5 to 6 | 814 |  |  | 770 |
7 and Higher | 158 |  |  | 166 |
Total | $ | 1,386 |  |  | $ | 1,457 |

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