Earnings (Loss) per Ordinary Share - Dilutive Shares (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of earnings per share [Abstract]
Ordinary shares	411,412,947	409,265,471	407,519,542
Fully vested options and currently exercisable	5,709,208	6,174,606	5,065,500
Weighted average number of shares	417,122,155	415,440,077	412,585,042
Dilutive potential of share options	257,250	0	2,121,358
Fully diluted number of ordinary shares	417,379,405	415,440,077	414,706,400
Profit (loss) attributable to equity shareholders	$ 133	$ (191)	$ 63

Disclosure of earnings per share [Abstract]

No definition available.

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- Definition

Number of Share Options Outstanding and Exercisable in Share-based Payment Arrangement

+ References

No definition available.

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- Definition

The weighted average number of ordinary shares outstanding plus the weighted average number of ordinary shares that would be issued on the conversion of all the dilutive potential ordinary shares into ordinary shares. [Refer: Ordinary shares [member]; Weighted average [member]]

+ References

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- Definition

The number of dilutive potential ordinary shares that relate to the assumed exercise of the entity's share options.

+ References

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- Definition

The number of shares issued by the entity.

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- Definition

The profit (loss) attributable to ordinary equity holders of the parent equity. [Refer: Profit (loss)]

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- Definition

The number of ordinary shares outstanding at the beginning of the period, adjusted by the number of ordinary shares bought back or issued during the period multiplied by a time-weighting factor.

+ References

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