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Segments and Disaggregated Revenue (Notes)
 9 Months Ended
Oct. 31, 2020
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, Argentina, Canada, Central America, Chile, China, India, Japan, Mexico, and the United Kingdom. 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, 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. Beginning with the first quarter in fiscal 2021, the Company revised its definition of eCommerce net sales to include certain pharmacy transactions and, accordingly, revised prior period amounts to maintain comparability.
Net sales by segment are as follows:
 Three Months Ended October 31,Nine Months Ended October 31,
(Amounts in millions)
2020201920202019
Net sales:
Walmart U.S.$88,353 $83,189 $270,378 $248,733 
Walmart International29,554 29,167 86,487 87,081 
Sam's Club15,845 14,625 47,383 43,504 
Net sales$133,752 $126,981 $404,248 $379,318 
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 October 31,Nine Months Ended October 31,
(Amounts in millions)
2020201920202019
Operating income (loss):
Walmart U.S.$4,589 $4,176 $13,948 $12,977 
Walmart International1,078 634 2,696 2,265 
Sam's Club431 327 1,517 1,258 
Corporate and support(320)(419)(1,100)(1,254)
Operating income5,778 4,718 17,061 15,246 
Interest, net516 589 1,700 1,799 
Other (gains) and losses(1,853)(244)(5,796)(996)
Income before income taxes$7,115 $4,373 $21,157 $14,443 
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 October 31,Nine Months Ended October 31,
Walmart U.S. net sales by merchandise category2020201920202019
Grocery$50,683 $48,117 $155,149 $142,511 
General merchandise26,927 24,964 84,075 76,602 
Health and wellness9,806 9,225 28,560 27,113 
Other categories937 883 2,594 2,507 
Total$88,353 $83,189 $270,378 $248,733 
Of Walmart U.S.'s total net sales, approximately $10.3 billion and $5.7 billion related to eCommerce for the three months ended October 31, 2020 and 2019, respectively. Approximately $29.1 billion and $15.8 billion related to eCommerce for the nine months ended October 31, 2020 and 2019, respectively.
(Amounts in millions)Three Months Ended October 31,Nine Months Ended October 31,
Walmart International net sales by market2020201920202019
Mexico and Central America$7,429 $7,913 $23,133 $23,765 
United Kingdom7,249 6,961 21,079 21,355 
Canada4,969 4,608 14,383 13,366 
China2,787 2,718 8,735 8,209 
Other7,120 6,967 19,157 20,386 
Total$29,554 $29,167 $86,487 $87,081 
Of Walmart International's total net sales, approximately $4.3 billion and $2.9 billion related to eCommerce for the three months ended October 31, 2020 and 2019, respectively. Approximately $10.5 billion and $7.9 billion related to eCommerce for the nine months ended October 31, 2020 and 2019, respectively.
(Amounts in millions)Three Months Ended October 31,Nine Months Ended October 31,
Sam’s Club net sales by merchandise category2020201920202019
Grocery and consumables$10,450 $8,900 $31,526 $26,151 
Fuel, tobacco and other categories1,942 2,646 6,023 8,127 
Home and apparel1,693 1,532 4,926 4,725 
Health and wellness1,017 858 2,849 2,527 
Technology, office and entertainment743 689 2,059 1,974 
Total$15,845 $14,625 $47,383 $43,504 
Of Sam's Club's total net sales, approximately $1.3 billion and $0.9 billion related to eCommerce for the three months ended October 31, 2020 and 2019, respectively. Approximately $3.7 billion and $2.6 billion related to eCommerce for the nine months ended October 31, 2020 and 2019, respectively.