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Segments and Disaggregated Revenue
 3 Months Ended
Apr. 30, 2021
Segment Reporting Information, Profit (Loss) [Abstract]  
Segments and Disaggregated Revenue Segments and Disaggregated Revenue
Segments
The Company is engaged in the operation of retail, wholesale, eCommerce websites and other units located throughout the U.S., Africa, Canada, Central America, Chile, China, India and Mexico. The Company's operations are conducted in three reportable segments: Walmart U.S., Walmart International and Sam's Club. The Company defines its segments as those operations whose results the chief operating decision maker ("CODM") regularly reviews to analyze performance and allocate resources. The Company sells similar individual products and services in each of its segments. It is impractical to segregate and identify revenues for each of these individual products and services.
The Walmart U.S. segment includes the Company's mass merchandising concept in the U.S., as well as eCommerce and omni-channel initiatives. The Walmart International segment consists of the Company's operations outside of the U.S., as well as eCommerce and omni-channel initiatives. The Sam's Club segment includes the warehouse membership clubs in the U.S., as well as samsclub.com and omni-channel initiatives. Corporate and support consists of corporate overhead and other items not allocated to any of the Company's segments.
The Company measures the results of its segments using, among other measures, each segment's net sales and operating income, which includes certain corporate overhead allocations. From time to time, the Company revises the measurement of each segment's operating income and other measures, including any corporate overhead allocations, as determined by the information regularly reviewed by its CODM. When the measurement of a segment changes, previous period amounts and balances are reclassified to be comparable to the current period's presentation.
Net sales by segment are as follows:
 Three Months Ended April 30,
(Amounts in millions)
20212020
Net sales:
Walmart U.S.$93,167 $88,743 
Walmart International27,300 29,766 
Sam's Club16,692 15,163 
Net sales$137,159 $133,672 
Operating income by segment, as well as operating loss for corporate and support, interest, net and other gains and losses are as follows:
 Three Months Ended April 30,
(Amounts in millions)
20212020
Operating income (loss):
Walmart U.S.$5,455 $4,302 
Walmart International1,194 806 
Sam's Club575 494 
Corporate and support(315)(378)
Operating income6,909 5,224 
Interest, net536 549 
Other (gains) and losses2,529 (721)
Income before income taxes$3,844 $5,396 
Disaggregated Revenues
In the following tables, segment net sales are disaggregated by either merchandise category or by market. From time to time, the Company revises the assignment of net sales of a particular item to a merchandise category. When the assignment changes, previous period amounts are reclassified to be comparable to the current period's presentation.
In addition, net sales related to eCommerce are provided for each segment, which include omni-channel sales, where a customer initiates an order digitally and the order is fulfilled through a store or club.
(Amounts in millions)Three Months Ended April 30,
Walmart U.S. net sales by merchandise category20212020
Grocery$51,391 $52,921 
General merchandise30,607 25,466 
Health and wellness9,970 9,600 
Other categories1,199 756 
Total$93,167 $88,743 
Of Walmart U.S.'s total net sales, approximately $11.3 billion and $8.3 billion related to eCommerce for the three months ended April 30, 2021 and 2020, respectively.
(Amounts in millions)Three Months Ended April 30,
Walmart International net sales by market20212020
Mexico and Central America$8,330 $8,496 
United Kingdom3,811 7,132 
Canada4,848 4,286 
China3,773 3,368 
Other6,538 6,484 
Total$27,300 $29,766 
Of Walmart International's total net sales, approximately $4.3 billion and $2.9 billion related to eCommerce for the three months ended April 30, 2021 and 2020, respectively.
(Amounts in millions)Three Months Ended April 30,
Sam’s Club net sales by merchandise category20212020
Grocery and consumables$10,669 $10,361 
Fuel, tobacco and other categories2,299 2,013 
Home and apparel2,082 1,280 
Health and wellness941 901 
Technology, office and entertainment701 608 
Total$16,692 $15,163 
Of Sam's Club's total net sales, approximately $1.5 billion and $1.0 billion related to eCommerce for the three months ended April 30, 2021 and 2020, respectively.