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Revenue (Tables)
 12 Months Ended
Jul. 29, 2023
Revenue from Contract with Customer [Abstract]  
Disaggregation of Revenue
The following table presents this disaggregation of revenue (in millions):
Years EndedJuly 29, 2023July 30, 2022July 31, 2021
Product revenue:
Secure, Agile Networks$29,105 $23,831 $22,725 
Internet for the Future5,306 5,276 4,511 
Collaboration4,052 4,472 4,727 
End-to-End Security3,859 3,699 3,382 
Optimized Application Experiences811 729 654 
Other Products9 11 15 
Total Product43,142 38,018 36,014 
Services13,856 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 EndedJuly 29, 2023July 30, 2022July 31, 2021
Revenue:
Secure, Agile Networks$29,105 $23,831 $22,725 
Internet for the Future5,306 5,276 4,511 
Collaboration4,052 4,472 4,727 
End-to-End Security3,859 3,699 3,382 
Optimized Application Experiences811 729 654 
Other Products9 11 15 
Total Product43,142 38,018 36,014 
Services13,856 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, 2023July 30, 2022July 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, 2023July 30, 2022
1 to 4$672 $414 
5 to 6954 814 
7 and Higher60 158 
Total$1,686 $1,386