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Basis of Presentation and Significant Accounting Policies - Additional Information (Detail) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Jun. 30, 2020 USD ($) segment	Dec. 31, 2019 USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of reportable segments (in segments) | segment			5
Asset impairment charges		$ 1,500
Reserve for doubtful accounts	$ 37		$ 37	$ 29
Sale of accounts receivable	$ 300	$ 300
Increase in sale of accounts receivable			$ 100

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Amount of decrease from sale of accounts receivable.

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-Name Accounting Standards Codification
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-Section 50
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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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