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Revenue (Tables)
 12 Months Ended
Jul. 27, 2024
Revenue from Contract with Customer [Abstract]  
Disaggregation of Revenue
The following table presents this disaggregation of revenue (in millions):
Years EndedJuly 27, 2024July 29, 2023July 30, 2022
Product revenue:
Networking$29,229 $34,570 $29,265 
Security5,075 3,859 3,699 
Collaboration4,113 4,052 4,472 
Observability837 661 581 
Total Product39,253 43,142 38,018 
Services14,550 13,856 13,539 
Total$53,803 $56,998 $51,557 
Our subscription revenue is recorded in product and services revenue in our Consolidated Statements of Operations as follows (in millions):
Years EndedJuly 27, 2024July 29, 2023July 30, 2022
Product$14,078 $11,931 $10,030 
Services13,302 12,709 12,363 
Total$27,380 $24,640 $22,393 
The following table presents revenue for groups of similar products and services (in millions):
Years EndedJuly 27, 2024July 29, 2023July 30, 2022
Revenue:
Networking$29,229 $34,570 $29,265 
Security5,075 3,859 3,699 
Collaboration4,113 4,052 4,472 
Observability837 661 581 
Total Product39,253 43,142 38,018 
Services14,550 13,856 13,539 
Total$53,803 $56,998 $51,557 
Allowance for Credit Loss for Accounts Receivable
The allowances for credit loss for our accounts receivable are summarized as follows (in millions):
July 27, 2024July 29, 2023July 30, 2022
Allowance for credit loss at beginning of fiscal year$85 $83 $109 
Provisions (benefits)36 39 64 
Recoveries (write-offs), net(34)(37)(81)
Foreign exchange and other— — (9)
Allowance for credit loss at end of fiscal year$87 $85 $83 
Schedule of Gross Contract Assets by Internal Risk Ratings
Gross contract assets by our internal risk ratings are summarized as follows (in millions):
July 27, 2024July 29, 2023
1 to 4$1,266 $672 
5 to 61,456 954 
7 and Higher72 60 
Total$2,794 $1,686