Credit Losses (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Accounts and notes receivable	$ 6,522	$ 8,510
Allowance for accounts and notes receivable	$ 37	$ 41
Accounts and notes receivable, percent outstanding less than 60 days	99.00%

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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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant