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Revenue (Tables)
 3 Months Ended
Oct. 24, 2020
Revenue from Contract with Customer [Abstract]  
Disaggregation of Revenue The following table presents this disaggregation of revenue (in millions):
Three Months Ended
October 24,
2020		October 26,
2019
Revenue:
Infrastructure Platforms$6,341 $7,553 
Applications1,380 1,499 
Security861 816 
Other Products5 11 
Total Product8,587 9,878 
Services3,342 3,281 
Total$11,929 $13,159 
The following table presents revenue for groups of similar products and services (in millions):
Three Months Ended
October 24,
2020		October 26,
2019
Revenue:
Infrastructure Platforms$6,341 $7,553 
Applications1,380 1,499 
Security861 816 
Other Products5 11 
Total Product8,587 9,878 
Services3,342 3,281 
Total$11,929 $13,159 
Schedule of Gross Contract Assets by Internal Risk Ratings
Gross contract assets by our internal risk ratings are summarized as follows (in millions):
October 24,
2020
1 to 4$442 
5 to 6737 
7 and Higher119 
Total$1,298