Revenue

6 Months Ended

Jun. 30, 2021

Revenue from Contract with Customer [Abstract]

Revenue

NOTE 3 - REVENUE

Revenue from customers is recognized when obligations under the terms of a contract with our customers are satisfied, which generally occurs with the delivery of oil, natural gas liquids (NGL), gas, chemicals or services, such as transportation. As of June 30, 2021, trade receivables, net, of $3.3 billion represented rights to payment, for which Occidental has satisfied its obligations under a contract and its right to payment is conditioned only on the passage of time.

The following table presents a reconciliation of revenue from customers to total net sales for the three and six months ended June 30, 2021 and 2020:

	Three months ended June 30,				Six months ended June 30,
millions	2021		2020		2021		2020
Revenue from customers	$	6,102	$	3,308	$	11,286	$	8,558
All other revenues (a)	(144)		(380)		(35)		983
Net sales	$	5,958	$	2,928	$	11,251	$	9,541

(a) Includes net marketing derivatives, natural gas collars, oil collars and calls and chemical exchange contracts.

DISAGGREGATION OF REVENUE FROM CONTRACTS WITH CUSTOMERS

The table below presents Occidental's revenue from customers by segment, product and geographical area. The oil and gas segment typically sells its oil, NGL and gas at the lease or concession area. Chemical and midstream and marketing segment revenues are shown by geographic area based on the location of the sale.

millions	United States		International		Eliminations		Total
Three months ended June 30, 2021
Oil and gas
Oil	$	3,028	$	683	$	—	$	3,711
NGL	472		78		—		550
Gas	311		76		—		387
Other	23		1		—		24
Segment total	$	3,834	$	838	$	—	$	4,672
Chemical	$	1,128	$	59	$	—	$	1,187
Midstream and marketing	$	322	$	152	$	—	$	474
Eliminations	$	—	$	—	$	(231)	$	(231)
Consolidated	$	5,284	$	1,049	$	(231)	$	6,102

millions	United States		International		Eliminations		Total
Three months ended June 30, 2020
Oil and gas
Oil	$	1,166	$	455	$	—	$	1,621
NGL	127		40		—		167
Gas	138		86		—		224
Other	20		1		—		21
Segment total	$	1,451	$	582	$	—	$	2,033
Chemical	$	793	$	46	$	—	$	839
Midstream and marketing	$	375	$	223	$	—	$	598
Eliminations	$	—	$	—	$	(162)	$	(162)
Consolidated	$	2,619	$	851	$	(162)	$	3,308

millions	United States		International		Eliminations		Total
Six months ended June 30, 2021
Oil and gas
Oil	$	5,492	$	1,232	$	—	$	6,724
NGL	856		130		—		986
Gas	564		140		—		704
Other	(8)		1		—		(7)
Segment total	$	6,904	$	1,503	$	—	$	8,407
Chemical	$	2,165	$	109	$	—	$	2,274
Midstream and marketing	$	819	$	283	$	—	$	1,102
Eliminations	$	—	$	—	$	(497)	$	(497)
Consolidated	$	9,888	$	1,895	$	(497)	$	11,286

millions	United States		International		Eliminations		Total
Six months ended June 30, 2020
Oil and gas
Oil	$	3,921	$	1,244	$	—	$	5,165
NGL	340		105		—		445
Gas	321		171		—		492
Other	31		1		—		32
Segment total	$	4,613	$	1,521	$	—	$	6,134
Chemical	$	1,703	$	97	$	—	$	1,800
Midstream and marketing	$	742	$	243	$	—	$	985
Eliminations	$	—	$	—	$	(361)	$	(361)
Consolidated	$	7,058	$	1,861	$	(361)	$	8,558