Properties, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2017

Property, Plant and Equipment [Abstract]

Properties, Plant and Equipment

	At December 31												Year ended December 31
	Gross Investment at Cost						Net Investment						Additions at Cost2						Depreciation Expense3
	2017		2016		2015		2017		2016		2015		2017		2016		2015		2017		2016		2015
Upstream
United States	$	84,602	$	83,929	$	93,848	$	38,722	$	39,710	$	43,125	$	4,995	$	4,432	$	6,586	$	5,527	$	6,576	$	8,545
International	224,211		214,557		208,395		123,191		125,502		127,459		7,934		12,084		19,993		12,096		11,247		10,803
Total Upstream	308,813		298,486		302,243		161,913		165,212		170,584		12,929		16,516		26,579		17,623		17,823		19,348
Downstream
United States	23,598		22,795		23,202		10,346		10,196		10,807		907		528		696		753		956		878
International	7,094		9,350		9,177		3,074		4,094		4,090		306		375		365		282		332		355
Total Downstream	30,692		32,145		32,379		13,420		14,290		14,897		1,213		903		1,061		1,035		1,288		1,233
All Other
United States	4,798		5,263		5,500		2,341		2,635		2,859		218		198		357		677		328		439
International	182		183		155		38		49		56		4		6		5		14		18		17
Total All Other	4,980		5,446		5,655		2,379		2,684		2,915		222		204		362		691		346		456
Total United States	112,998		111,987		122,550		51,409		52,541		56,791		6,120		5,158		7,639		6,957		7,860		9,862
Total International	231,487		224,090		217,727		126,303		129,645		131,605		8,244		12,465		20,363		12,392		11,597		11,175
Total	$	344,485	$	336,077	$	340,277	$	177,712	$	182,186	$	188,396	$	14,364	$	17,623	$	28,002	$	19,349	$	19,457	$	21,037

¹  Other than the United States, Australia and Nigeria, no other country accounted for 10 percent or more of the company’s net properties, plant and equipment (PP&E) in 2017. Australia had PP&E of $55,514, $53,962 and $49,205 in 2017, 2016, and 2015, respectively. Nigeria had PP&E of $17,076, $17,922 and $18,773 for 2017, 2016 and 2015, respectively.

²  Net of dry hole expense related to prior years’ expenditures of $42, $175 and $1,573 in 2017, 2016 and 2015, respectively.

³  Depreciation expense includes accretion expense of $668, $749 and $715 in 2017, 2016 and 2015, respectively, and impairments of $1,021, $3,186 and $4,066 in 2017, 2016 and 2015, respectively.