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.

The Walmart U.S. segment includes the Company's mass merchant concept in the U.S. operating under the "Walmart" or "Wal-Mart" brands, as well as eCommerce. The Walmart International segment consists of the Company's operations outside of the U.S., including eCommerce. The Sam's Club segment includes the warehouse membership clubs in the U.S., as well as samsclub.com. 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.

Information for the Company's segments, as well as for Corporate and support, including the reconciliation to income before income taxes, is provided in the following table:



(Amounts in millions)	Walmart U.S.		Walmart International		Sam's Club		Corporate and support			Consolidated
Fiscal Year Ended January 31, 2018
Net sales	$	318,477	$	118,068	$	59,216	$	—		$	495,761
Operating income (loss)	17,869		5,352		982		(3,766		)	20,437
Interest, net										(2,178		)
Loss on extinguishment of debt										(3,136		)
Income before income taxes										$	15,123
Total assets	$	104,347	$	81,549	$	13,418	$	5,208		$	204,522
Depreciation and amortization	3,655		2,601		466		3,807			10,529
Capital expenditures	5,680		2,607		626		1,138			10,051

Fiscal Year Ended January 31, 2017
Net sales	$	307,833	$	116,119	$	57,365	$	—		$	481,317
Operating income (loss)	17,745		5,758		1,671		(2,410		)	22,764
Interest, net										(2,267		)
Income before income taxes										$	20,497
Total assets	$	104,262	$	74,508	$	14,125	$	5,930		$	198,825
Depreciation and amortization	3,298		2,629		487		3,666			10,080
Capital expenditures	6,090		2,697		639		1,193			10,619

Fiscal Year Ended January 31, 2016
Net sales	$	298,378	$	123,408	$	56,828	$	—		$	478,614
Operating income (loss)	19,087		5,346		1,820		(2,148		)	24,105
Interest, net										(2,467		)
Income before income taxes										$	21,638
Total assets	$	103,109	$	73,720	$	13,998	$	8,754		$	199,581
Depreciation and amortization	2,800		2,549		472		3,633			9,454
Capital expenditures	6,728		2,930		695		1,124			11,477

Total revenues, consisting of net sales and membership and other income, and long-lived assets, consisting primarily of property and equipment, net, aggregated by the Company's U.S. and non-U.S. operations for fiscal 2018, 2017 and 2016, are as follows:



	Fiscal Years Ended January 31,
(Amounts in millions)	2018		2017		2016
Revenues
U.S. operations	$	380,580	$	367,784	$	357,559
Non-U.S. operations	119,763		118,089		124,571
Total revenues	$	500,343	$	485,873	$	482,130

Long-lived assets
U.S. operations	$	81,478	$	82,746	$	82,475
Non-U.S. operations	33,340		31,432		34,041
Total long-lived assets	$	114,818	$	114,178	$	116,516

No individual country outside of the U.S. had total revenues or long-lived assets that were material to the consolidated totals. Additionally, the Company did not generate material total revenues from any single customer.