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Acquisitions - Western Polymer (Details) - USD ($) $ in Millions		12 Months Ended
	Mar. 01, 2019	Dec. 31, 2020	Dec. 31, 2019
Acquisitions
Payment for acquisition, net of cash acquired		$ 236	$ 42
Cash acquired from acquisition		$ 14	$ 4
Western Polymer
Acquisitions
Payment for acquisition, net of cash acquired	$ 42
Cash acquired from acquisition	4
Goodwill and intangible assets	13
Tangible assets, net	$ 29

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- Definition

Amount of intangible assets and goodwill acquired at the acquisition date.

+ References

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- Definition

The amount of property, plant, and equipment recognized as of the acquisition date.

+ References

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- Definition

The cash inflow associated with the acquisition of business during the period (for example, cash that was held by the acquired business).

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