Acquisitions - (Narrative) (Details) $ in Millions		12 Months Ended
Jan. 21, 2020 USD ($)	Dec. 31, 2017 USD ($) Business
Business Acquisition [Line Items]
Consideration transferred		$ 89
Number of businesses acquired (in businesses) \| Business		1
Change in noncontrolling interests		$ 63
Adjustments to additional paid in capital, other		1
Decrease in other long-term liabilities		25
Gain on settlement of liabilities		$ 10
Matricel \| Subsequent Event
Business Acquisition [Line Items]
Consideration transferred	$ 43

Decrease in Other Long-Term Liabilities

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Amount of other increase (decrease) in additional paid in capital (APIC).

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

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In a business combination in which the amount of net identifiable assets acquired and liabilities assumed exceeds the aggregate consideration transferred or to be transferred (as defined), this element represents the amount of gain recognized by the entity.

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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Decrease in noncontrolling interest (for example, but not limited to, redeeming or purchasing the interests of noncontrolling shareholders, issuance of shares (interests) by the non-wholly owned subsidiary to the parent entity for other than cash, and a buyback of shares (interest) by the non-wholly owned subsidiary from the noncontrolling interests).

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The number of businesses acquired by the entity during the period.

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