Property, plant and equipment

12 Months Ended

Dec. 31, 2018

Property, plant and equipment [abstract]

Property, plant and equipment

Property, plant and equipment

															$ million
	Land and land improvements		Buildings		Oil and gas propertiesa		Plant, machinery and equipment		Fittings, fixtures and office equipment		Transportationb		Oil depots, storage tanks and service stations		Total
Cost
At 1 January 2018	3,474		1,573		226,054		46,662		2,853		10,774		8,748		300,138
Exchange adjustments	(168	)	(58	)	—		(892	)	(73	)	(43	)	(501	)	(1,735	)
Additions	233		40		9,712		2,323		204		(112	)	736		13,136
Acquisitions	163		4		10,882		9		1		2		36		11,097
Remeasurements	—		—		17		—		—		—		—		17
Transfers from intangible assets	—		—		901		—		—		—		—		901
Deletions	(140	)	(45	)	(14,699	)	(1,810	)	(238	)	(128	)	(146	)	(17,206	)
At 31 December 2018	3,562		1,514		232,867		46,292		2,747		10,493		8,873		306,348
Depreciation
At 1 January 2018	683		818		133,326		20,996		2,136		7,523		5,185		170,667
Exchange adjustments	(25	)	(24	)	—		(460	)	(52	)	(27	)	(279	)	(867	)
Charge for the year	92		52		12,342		1,820		189		252		384		15,131
Impairment losses	2		—		86		253		—		178		2		521
Impairment reversals	—		—		(564	)	(1	)	—		(17	)	—		(582	)
Deletions	(126	)	(139	)	(11,333	)	(1,733	)	(232	)	(75	)	(145	)	(13,783	)
At 31 December 2018	626		707		133,857		20,875		2,041		7,834		5,147		171,087
Net book amount at 31  December 2018	2,936		807		99,010		25,417		706		2,659		3,726		135,261
Cost
At 1 January 2017	3,066		2,235		215,564		43,725		2,670		14,000		7,623		288,883
Exchange adjustments	264		42		—		1,251		91		28		772		2,448
Additions	264		94		12,366		1,890		240		347		575		15,776
Acquisitions	—		—		—		41		—		228		1		270
Transfers from intangible assets	—		—		451		—		—		—		—		451
Deletions	(120	)	(798	)	(2,327	)	(245	)	(148	)	(3,829	)	(223	)	(7,690	)
At 31 December 2017	3,474		1,573		226,054		46,662		2,853		10,774		8,748		300,138
Depreciation
At 1 January 2017	584		1,062		122,428		18,686		2,022		9,823		4,521		159,126
Exchange adjustments	33		27		—		647		67		19		466		1,259
Charge for the year	90		94		12,385		1,764		185		381		350		15,249
Impairment losses	3		35		624		35		—		479		17		1,193
Impairment reversals	—		—		(135	)	—		—		(72	)	—		(207	)
Deletions	(27	)	(400	)	(1,976	)	(136	)	(138	)	(3,107	)	(169	)	(5,953	)
At 31 December 2017	683		818		133,326		20,996		2,136		7,523		5,185		170,667
Net book amount at 31  December 2017	2,791		755		92,728		25,666		717		3,251		3,563		129,471
Assets held under finance leases at net book amount included above
At 31 December 2018	—		2		12		207		—		295		6		522
At 31 December 2017	—		2		16		238		—		233		7		496
Assets under construction included above
At 31 December 2018															22,522
At 31 December 2017															23,789

^a For information on significant estimates and judgements made in relation to the estimation of oil and natural reserves see Property, plant and equipment within Note 1.

^b  Includes adjustments to decommissioning provisions see Note 1 for further information.