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Accounts and Notes Receivable Allowance Rollforward (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Receivables [Abstract]
Accounts Receivable, Allowance for Credit Loss, Beginning Balance	$ 208	$ 174
Net provision for credit losses	48	124
Write-offs charged against allowance		(6)
Recoveries collected	(51)	(78)
Other deductions against allowance	11	(7)
Accounts Receivable, Allowance for Credit Loss, Ending Balance	$ 216	$ 207

X

- Definition

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

+ References

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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
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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
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-Section 50
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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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