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Supplemental Financial Information - Components of Accounts Receivable (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Accounts Receivable, after Allowance for Credit Loss, Current [Abstract]
Accounts Receivable, before Allowance for Credit Loss, Current	$ 1,097		$ 983
Accounts Receivable, Allowance for Credit Loss, Current	(26)		(24)
Accounts Receivable, after Allowance for Credit Loss, Current, Total	1,071		959
Accounts Receivable, Allowance for Credit Loss, Writeoff	2	$ 12
Trade Accounts Receivable [Member]
Accounts Receivable, after Allowance for Credit Loss, Current [Abstract]
Accounts Receivable, before Allowance for Credit Loss, Current	1,049		939
Other Receivables [Member]
Accounts Receivable, after Allowance for Credit Loss, Current [Abstract]
Accounts Receivable, before Allowance for Credit Loss, Current	$ 48		$ 44

X

- Definition

Amount, before allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

+ References

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-Publisher FASB
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Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

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

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