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CAPITAL STOCK (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of classes of share capital [line items]
Dividends recognised as distributions to owners of parent	$ 547	$ 218
Dividends paid, classified as financing activities	547	548
Dividends reinvested	$ 0	0
Common shares
Disclosure of classes of share capital [line items]
Par value per share (in dollars per share)	$ 0
Capital stock
Disclosure of classes of share capital [line items]
Dividends reinvested	$ 4	$ 20

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- Definition

Dividends reinvested by owners

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- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

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- Definition

The cash outflow for dividends paid by the entity, classified as financing activities.

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- Definition

The amount of dividends recognised as distributions to owners of the parent. [Refer: Parent [member]]

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- Definition

The nominal value per share.

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