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Asset Impairments (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2021	Jun. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Concentration Risk [Line Items]
Asset impairments	$ 105	$ 189	$ 119	$ 161
Revenue Benchmark | Geographic Concentration Risk | CHINA
Concentration Risk [Line Items]
Concentration risk (as a percent)					2.00%

X

- Definition

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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