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Accounts and Notes Receivable Allowance Rollforward (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Receivables [Abstract]
A/R trade and notes receivable - trade, allowance	$ 208	$ 174
Additions charged to expense	154
Write-offs charged against allowance	(8)
Recoveries collected	(101)
Other deductions against allowance	$ (11)

X

- Definition

Amount of allowance for credit loss on accounts receivable, classified as current.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(4)
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-Section 45
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X

- Definition

Amount of increase (decrease) in allowance for credit loss on accounts receivable.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
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-Section 50
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X

- Definition

Amount of direct write-downs of accounts receivable charged against the allowance.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 13
-Subparagraph (d)
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- Definition

Amount of increase in allowance for credit loss on financing receivable from recovery.

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- Definition

Amount of expense (reversal of expense) for expected credit loss on accounts receivable.

+ References

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