v3.20.4

Identified Intangible Assets - Summary of Changes in Identified Intangible Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Cost			$ 9,249	$ 9,384	$ 9,183
Accumulated amortization/impairment	$ (5,764)	$ (4,716)
Book value	3,620	3,620	$ 2,242	$ 3,620	$ 4,467
Indefinite-lived Intangible Assets [Roll Forward]
Beginning balance, Book value	3,620	4,467
Changes in book value:
Acquisitions/additions	63	683
Transfer to assets held for sale	0	(1)
Amortization	(1,398)	(1,529)
Impairment	(43)
Translation differences	0
Total changes	(1,378)	(847)
Ending balance, Book value	$ 2,242	$ 3,620

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- Definition

Changes In Net Book Value [Abstract]

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Finite-Lived Intangible Assets, Transfers

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- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount of foreign currency translation gain (loss) which increases (decreases) assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount of increase (decrease) in carrying value of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition.

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The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of a finite-lived intangible asset to fair value.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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