Supplemental Information (Details) - USD ($) $ in Millions	6 Months Ended
Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Supplemental Information [Abstract]
Gross receivables aged less than one year	$ 3,982		$ 4,390
Gross receivables aged greater than one year	302		249
Receivables, net of reserves	3,994		4,322
Allowances for expected credit losses	416		306
Provisions for expected credit losses	95	$ 111
Inventories
Raw materials and supplies	387		396
Work in process	359		331
Finished goods	969		970
Total inventories	$ 1,715		$ 1,697

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