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Property, Net Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Impairment of Long-Lived Assets Held-for-use	$ 4	$ 9	$ 1
Asset Impairment Charges	34	9	1
Fair Value, Measurements, Nonrecurring | Cost of Sales
Property, Plant and Equipment [Line Items]
Impairment of Long-Lived Assets Held-for-use	$ 4	$ 9	$ 1

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.

+ References

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-Publisher FASB
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-SubTopic 10
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- Definition

The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

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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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