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Segment Information and Major Customers
 3 Months Ended
Oct. 24, 2020
Segment Reporting [Abstract]  
Segment Information and Major Customers Segment Information and Major Customers
(a)Revenue and Gross Margin by Segment
We conduct business globally and are primarily managed on a geographic basis consisting of three segments: the Americas, EMEA, and APJC. Our management makes financial decisions and allocates resources based on the information it receives from our internal management system. Sales are attributed to a segment based on the ordering location of the customer. We do not allocate research and development, sales and marketing, or general and administrative expenses to our segments in this internal management system because management does not include the information in our measurement of the performance of the operating segments. In addition, we do not allocate amortization and impairment of acquisition-related intangible assets, share-based compensation expense, significant litigation settlements and other contingencies, charges related to asset impairments and restructurings, and certain other charges to the gross margin for each segment because management does not include this information in our measurement of the performance of the operating segments.
Summarized financial information by segment for the first quarter of fiscal 2021 and 2020, based on our internal management system and as utilized by our Chief Operating Decision Maker (“CODM”), is as follows (in millions):
Three Months Ended
October 24,
2020		October 26,
2019
Revenue:
Americas$7,198 $7,977 
EMEA2,964 3,283 
APJC1,767 1,899 
Total$11,929 $13,159 
Gross margin:
Americas$4,847 $5,316 
EMEA1,894 2,166 
APJC1,113 1,194 
Segment total7,853 8,676 
Unallocated corporate items(272)(212)
Total$7,581 $8,464 
Amounts may not sum and percentages may not recalculate due to rounding.
Revenue in the United States was $6.5 billion and $7.1 billion for the first quarter of fiscal 2021 and 2020, respectively.
(b)Revenue for Groups of Similar Products and Services
We design, manufacture, and sell Internet Protocol (IP)-based networking and other products related to the communications and IT industry and provide services associated with these products and their use.
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 
Amounts may not sum due to rounding. We have made certain reclassifications to the product revenue amounts for prior period to conform to the current year presentation.