NET SALES

The following tables show disaggregated net sales from contracts with customers by major source:



	Three Months Ended March 31, 2019
			Europe, Middle East
(In millions)	Americas		and Africa		Asia Pacific		Total
Tire unit sales	$	1,493	$	1,143	$	453	$	3,089
Other tire and related sales	137		72		32		241
Retail services and service related sales	132		4		15		151
Chemical	109		—		—		109
Other	5		2		1		8
Net Sales by reportable segment	$	1,876	$	1,221	$	501	$	3,598



	Three Months Ended March 31, 2018
			Europe, Middle East
(In millions)	Americas		and Africa		Asia Pacific		Total
Tire unit sales	$	1,506	$	1,209	$	518	$	3,233
Other tire and related sales	135		105		30		270
Retail services and service related sales	137		15		22		174
Chemical	148		—		—		148
Other	3		1		1		5
Net Sales by reportable segment	$	1,929	$	1,330	$	571	$	3,830

Tire unit sales consist of consumer, commercial, farm and off-the-road tire sales, including the sale of new Company-branded tires through Company-owned retail channels. Other tire and related sales consist of aviation, race, motorcycle and all-terrain vehicle tire sales, retread sales and other tire related sales. Sales of tires in this category are not included in reported tire unit information. Retail services and service related sales consist of automotive services performed for customers through our Company-owned retail channels, and includes service related products. Chemical sales relate to the sale of synthetic rubber and other chemicals to third-parties, and exclude intercompany sales. Other sales include items such as franchise fees and ancillary tire parts, such as tire rims, tire valves and valve stems.

When we receive consideration from a customer prior to transferring goods or services under the terms of a sales contract, we record deferred revenue, which represents a contract liability. Deferred revenue included in Other Current Liabilities in the Consolidated Balance Sheets totaled $37 million and $39 million at March 31, 2019 and December 31, 2018, respectively. Deferred revenue included in Other Long Term Liabilities in the Consolidated Balance Sheets totaled $35 million and $39 million at March 31, 2019 and December 31, 2018, respectively. We recognize deferred revenue after we have transferred control of the goods or services to the customer and all revenue recognition criteria are met.

The following table presents the balance of deferred revenue related to contracts with customers, and changes during the three months ended March 31, 2019:




(In millions)
Balance at December 31, 2018	$	78
Revenue deferred during period	34
Revenue recognized during period	(40		)
Impact of foreign currency translation	—
Balance at March 31, 2019	$	72