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, Brazil, 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 entity wide.

The Walmart U.S. segment includes the Company's mass merchant concept in the U.S., as well as eCommerce. The Walmart International segment consists of the Company's operations outside of the U.S., as well as eCommerce. The Sam's Club segment includes the warehouse membership clubs in the U.S., as well as eCommerce. 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. In fiscal 2019, the Company revised certain of its corporate overhead allocations to the operating segments and, accordingly, revised prior period amounts for comparability.

Net sales by segment are as follows:



	Three Months Ended April 30,
(Amounts in millions)	2018		2017
Net sales:
Walmart U.S.	$	77,748	$	75,436
Walmart International	30,260		27,097
Sam's Club	13,622		13,993
Net sales	$	121,630	$	116,526

Operating income by segment, as well as operating loss for corporate and support, interest, net, and unrealized (gains) and losses are as follows:



	Three Months Ended April 30,
(Amounts in millions)	2018			2017
Operating income (loss):
Walmart U.S.	$	3,927		$	4,052
Walmart International	1,265			1,139
Sam's Club	325			399
Corporate and support	(363		)	(353		)
Operating income	5,154			5,237
Interest, net	487			563
Unrealized (gains) and losses	1,845			—
Income before income taxes	$	2,822		$	4,674

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, 2018
Walmart U.S. net sales by merchandise category	Three Months Ended April 30, 2018
Grocery	$	43,860
General merchandise	24,174
Health and wellness	9,128
Other categories	586
Total	$	77,748

Of Walmart U.S.'s total net sales, approximately $3.2 billion relates to eCommerce for the three months ended April 30, 2018.



(Amounts in millions)	Three Months Ended April 30, 2018
Walmart International net sales by market	Three Months Ended April 30, 2018
Mexico and Central America	$	7,684
United Kingdom	7,515
Canada	4,254
China	3,205
Other	7,602
Total	$	30,260

Of International's total net sales, approximately $1.0 billion relates to eCommerce for the three months ended April 30, 2018.



(Amounts in millions)	Three Months Ended April 30, 2018
Sam’s Club net sales by merchandise category	Three Months Ended April 30, 2018
Grocery and consumables	$	8,012
Fuel, tobacco and other categories	2,919
Home and apparel	1,202
Health and wellness	801
Technology, office and entertainment	688
Total	$	13,622

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