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Income Taxes - Summary of Income Taxes (Detail) - USD ($)
$ in Millions

6 Months Ended

Jun. 30, 2020

Jun. 30, 2019

Disclosure Of Income Taxes [line items]

$ (807)

Deferred tax (expense)/income

315

Income tax expense

$ (492)

$ (1,565)

^[1]

As Restated [Member]

Disclosure Of Income Taxes [line items]

(1,735)

Deferred tax (expense)/income

170

Income tax expense

$ (1,565)

[1]	The unaudited condensed consolidated interim income statement for the six-month period ended 30 June 2019 has been restated to reflect the classification of the Australian operations as discontinued operations.

The aggregate amount included in the determination of profit (loss) for the period in respect of current tax and deferred tax. [Refer: Current tax expense (income); Deferred tax expense (income)]

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