Earnings per ordinary share (Tables)

12 Months Ended

Dec. 31, 2019

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Summary of Earnings Per Ordinary Share

Continuing and total operations	2019			2018 Restated			2017 Restated
Basic earnings per ordinary share
Profit available for equity holders ($m)		385			349			534
Basic weighted average number of ordinary shares (millions)		183			190			193
Basic earnings per ordinary share (cents)		210.4			183.7			276.7
Diluted earnings per ordinary share
Profit available for equity holders ($m)		385			349			534
Diluted weighted average number of ordinary shares (millions)		184			192			194
Diluted earnings per ordinary share (cents)		209.2			181.8			275.3
Adjusted earnings per ordinary share
Profit available for equity holders ($m)		385			349			534
Adjusting items:
System Fund revenues and expenses ($m)		49			146			34
Interest attributable to the System Fund ($m)		(18	)		(19	)		(13	)
Tax attributable to the System Fund ($m)		—			—			3
Operating exceptional items ($m) (note 6)		186			104			(4	)
Change in fair value of contingent purchase consideration ($m) (note 25)a		(27	)		4			—
Tax on exceptional items ($m) (note 6)		(20	)		(22	)		2
Exceptional tax ($m) (note 6)		—			(5	)		(87	)
Adjusted earnings ($m)		555			557			469
Basic weighted average number of ordinary shares (millions)		183			190			193
Adjusted earnings per ordinary share (cents)		303.3			293.2			243.0
Adjusted diluted earnings per ordinary share
Adjusted earnings ($m)		555			557			469
Diluted weighted average number of ordinary shares (millions)		184			192			194
Adjusted diluted earnings per ordinary share (cents)		301.6			290.1			241.8

a Adjusted earnings per ordinary share for 2018 has been restated to exclude the change in fair value of contingent purchase consideration.

	2019 millions		2018 millions		2017 millions
Diluted weighted average number of ordinary shares is calculated as:
Basic weighted average number of ordinary shares		183		190		193
Dilutive potential ordinary shares		1		2		1
		184		192		194