Segments
 3 Months Ended
Apr. 30, 2019
Segment Reporting Information, Profit (Loss) [Abstract]  
Segments
Segments and Disaggregated Revenue
Segments
The Company is engaged in the operation of retail, wholesale and other units, as well as eCommerce websites, located throughout the U.S., Africa, Argentina, Canada, Central America, Chile, China, India, Japan, Mexico, and the United Kingdom, as well as Brazil until the sale of the majority stake discussed in Note 8. 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 merchant 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.
Net sales by segment are as follows:
 
 
Three Months Ended April 30,
(Amounts in millions)
 
2019

2018
Net sales:
 
 
 
 
Walmart U.S.
 
$
80,344

 
$
77,748

Walmart International
 
28,775

 
30,260

Sam's Club
 
13,830

 
13,622

Net sales
 
$
122,949

 
$
121,630


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)
 
2019
 
2018
Operating income (loss):
 
 
 
 
Walmart U.S.
 
$
4,142

 
$
3,927

Walmart International
 
738

 
1,265

Sam's Club
 
451

 
325

Corporate and support
 
(386
)
 
(363
)
Operating income
 
4,945

 
5,154

Interest, net
 
625

 
487

Other (gains) and losses
 
(837
)
 
1,845

Income before income taxes
 
$
5,157

 
$
2,822


Disaggregated Revenues
In the following tables, segment net sales are disaggregated by either merchandise category or market. In addition, net sales related to eCommerce are provided for each segment, which include omni-channel sales, where a customer initiates an order online 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 category
 
2019
 
2018
Grocery
 
$
45,404

 
$
43,860

General merchandise
 
24,607

 
24,174

Health and wellness
 
9,518

 
9,128

Other categories
 
815

 
586

Total
 
$
80,344

 
$
77,748


Of Walmart U.S.'s total net sales, approximately $4.3 billion and $3.2 billion related to eCommerce for the three months ended April 30, 2019 and 2018, respectively.
(Amounts in millions)
 
Three Months Ended April 30,
Walmart International net sales by market
 
2019
 
2018
Mexico and Central America
 
$
7,837

 
$
7,684

United Kingdom
 
7,077

 
7,515

Canada
 
4,122

 
4,254

China
 
3,063

 
3,205

Other
 
6,676

 
7,602

Total
 
$
28,775

 
$
30,260


Of International's total net sales, approximately $2.5 billion and $1.0 billion related to eCommerce for the three months ended April 30, 2019 and 2018, respectively.
(Amounts in millions)
 
Three Months Ended April 30,
Sam’s Club net sales by merchandise category
 
2019
 
2018
Grocery and consumables
 
$
8,373

 
$
8,012

Fuel, tobacco and other categories
 
2,777

 
2,919

Home and apparel
 
1,178

 
1,202

Health and wellness
 
827

 
801

Technology, office and entertainment
 
675

 
688

Total
 
$
13,830

 
$
13,622


Of Sam's Club's total net sales, approximately $0.7 billion and $0.6 billion related to eCommerce for the three months ended April 30, 2019 and 2018, respectively.