Earnings per ordinary share (Tables)

12 Months Ended

Dec. 31, 2017

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Summary of Earnings Per Ordinary Share

Continuing and total operations	2017			2016			2015
Basic earnings per ordinary share
Profit available for equity holders ($m)		592			414			1,222
Basic weighted average number of ordinary shares (millions)		193			212			235
Basic earnings per ordinary share (cents)		306.7			195.3			520.0
Diluted earnings per ordinary share
Profit available for equity holders ($m)		592			414			1,222
Diluted weighted average number of ordinary shares (millions)		194			214			238
Diluted earnings per ordinary share (cents)		305.2			193.5			513.4
Adjusted earnings per ordinary share
Profit available for equity holders ($m)		592			414			1,222
Adjusting items (note 5):
Exceptional items before tax ($m)		(4	)		29			(819	)
Tax on exceptional items ($m)		2			(12	)		8
Exceptional tax ($m)		(118	)		—			—
Adjusted earnings ($m)		472			431			411
Basic weighted average number of ordinary shares (millions)		193			212			235
Adjusted earnings per ordinary share (cents)		244.6			203.3			174.9
Adjusted diluted earnings per ordinary share
Adjusted earnings ($m)		472			431			411
Diluted weighted average number of ordinary shares (millions)		194			214			238
Adjusted diluted earnings per ordinary share (cents)		243.3			201.4			172.7
	2017 millions			2016 millions			2015 millions
Diluted weighted average number of ordinary shares is calculated as:
Basic weighted average number of ordinary shares		193			212			235
Dilutive potential ordinary shares		1			2			3
		194			214			238