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Segment Information and Major Customers
 6 Months Ended
Jan. 23, 2021
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 second quarter and first six months 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 EndedSix Months Ended
January 23,
2021		January 25,
2020		January 23, 2021January 25, 2020
Revenue:
Americas$6,969 $7,013 $14,168 $14,990 
EMEA3,207 3,134 6,171 6,417 
APJC1,784 1,859 3,551 3,758 
Total$11,960 $12,005 $23,889 $25,164 
Gross margin:
Americas$4,705 $4,692 $9,552 $10,008 
EMEA2,145 2,062 4,038 4,229 
APJC1,155 1,219 2,268 2,413 
Segment total8,005 7,974 15,858 16,650 
Unallocated corporate items(221)(210)(493)(422)
Total$7,784 $7,764 $15,365 $16,228 
Amounts may not sum and percentages may not recalculate due to rounding.
Revenue in the United States was $6.2 billion for each of the second quarters of fiscal 2021 and 2020 and $12.7 billion and $13.3 billion for the first six months 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 EndedSix Months Ended
January 23,
2021		January 25,
2020		January 23,
2021		January 25,
2020
Revenue:
Infrastructure Platforms$6,391 $6,567 $12,732 $14,120 
Applications1,354 1,349 2,734 2,847 
Security822 749 1,684 1,565 
Other Products4 7 9 17 
Total Product8,572 8,671 17,159 18,549 
Services3,388 3,334 6,730 6,615 
Total$11,960 $12,005 $23,889 $25,164 
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.