Receivables, Allowance for Credit Losses and Credit Quality of Receivables - Components of Accounts and Notes Receivable, Net (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Current:
Receivables	$ 477	$ 514
Allowance for credit losses	(62)	(76)
Current receivables, net	415	438
Long-term:
Receivables	20	24
Allowance for credit losses	(2)	(5)
Long-term receivables, net	18	19
Financing Receivable, after Allowance for Credit Loss, Total	$ 433	$ 457

Amount, after allowance for credit loss, of accounts and financing receivables, classified as current. Includes, but is not limited to, notes and loan receivable.

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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.

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

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Amount, before allowance for credit loss, of financing receivable.

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Amount, after allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement.

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