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INTANGIBLE ASSETS - Reconciliation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Reconciliation of changes in intangible assets other than goodwill
Cost at beginning of the year	$ 3,936
Cost at end of year	2,948	$ 3,936
Cost
Reconciliation of changes in intangible assets other than goodwill
Cost at beginning of the year	4,479	4,631
Additions, net of disposals	35	21
Foreign currency translation	(987)	(173)
Cost at end of year	$ 3,527	$ 4,479

X

- Definition

The amount of additions to intangible assets other than goodwill, other than those acquired through business combinations. [Refer: Business combinations [member]; Intangible assets other than goodwill]

+ References

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- Definition

The increase (decrease) in intangible assets other than goodwill resulting from net exchange differences arising on the translation of the financial statements from the functional currency into a different presentation currency, including the translation of a foreign operation into the presentation currency of the reporting entity. [Refer: Intangible assets other than goodwill]

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- Definition

The amount of identifiable non-monetary assets without physical substance. This amount does not include goodwill. [Refer: Goodwill]

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