Goodwill (Tables)

12 Months Ended

Dec. 31, 2018

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Reconciliation of Goodwill

Million US dollar	31 December 2018			31 December 2017
Acquisition cost
Balance at end of previous year		140 980			135 897
Effect of movements in foreign exchange		(7 541	)		4 684
Disposals through the sale of subsidiaries		(652	)		—
Acquisitions through business combinations		107			398
Hyperinflation monetary adjustments		435			—
Reclassified as held for sale		(13	)		—
Balance at end of the period		133 316			140 980
Impairment losses
Balance at end of previous year		(40	)		(34	)
Impairment losses		—			(6	)
Disposals through the sale of subsidiaries		35			—
Balance at end of the period		(5	)		(40	)
Carrying amount
at 31 December 2017		140 940			140 940
at 31 December 2018		133 311			—

Summary of Carrying Amount of Goodwill Allocated to Different Cash-generating Units

The carrying amount of goodwill was allocated to the different cash-generating units as follows:

Million US dollar Cash-generating unit	2018		2017
United States		33 288		33 277
Colombia		18 802		20 425
South Africa		15 896		18 551
Peru		14 513		15 074
Mexico		12 614		12 580
Rest of Africa		7 716		8 326
Australia		6 348		6 922
Brazil		4 715		5 523
South Korea		3 949		4 119
Ecuador		3 925		3 925
China		2 758		2 914
Honduras & El Salvador		2 284		2 335
Canada		1 891		2 056
Other countries		4 613		4 913
Total carrying amount of goodwill		133 311		140 940

Summary of Weighted Average Cost of Capital

The WACC applied in US dollar nominal terms were as follows:

Cash-generating unit	2018			2017
United States		7	%		6	%
Colombia		7	%		7	%
South Africa		8	%		8	%
Peru		7	%		7	%
Mexico		8	%		9	%
Rest of Africa		11	%		10	%
Australia		7	%		6	%
South Korea		7	%		6	%
Ecuador		11	%		11	%