Goodwill and impairment review of goodwill (Tables)

12 Months Ended

Dec. 31, 2019

Intangible Assets [Abstract]

Disclosure of reconciliation of goodwill

			$ million
	2019		2018
Cost
At 1 January	12,815		12,163
Exchange adjustments	79		(210	)
Acquisitions and other additionsa	26		1,046
Deletions	(55	)	(184	)
At 31 December	12,865		12,815
Impairment losses
At 1 January	611		612
Exchange adjustments	—		—
Impairment losses for the year	386		—
Deletions	—		(1	)
At 31 December	997		611
Net book amount at 31 December	11,868		12,204
Net book amount at 1 January	12,204		11,551

^a 2018 principally relates to the purchase of an additional 16.5% share in the Clair field in the North Sea. See Note 3 - Other significant transactions for further information.

Impairment review of goodwill

Goodwill at 31 December	2019	2018
Upstream	7,958	8,346
Downstream	3,904	3,802
Other businesses and corporate	6	56
	11,868	12,204

Schedule of goodwill

						$ million
			2019			2018
	Lubricants	Other	Total	Lubricants	Other	Total
Goodwill	2,779	1,125	3,904	2,692	1,110	3,802

	2019	2018
Goodwill	7,958	8,346
Excess of recoverable amount over carrying amount	93,250	53,391