Divestitures - FS Effect (Details) - 2019 Divestitures Plan - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Disposal group, disposed of by sale, not discontinued operations
Liabilities held for sale
Operating revenue		$ 37		$ 73
Disposal group, held-for-sale
Assets held for sale
Trade receivables	$ 34		$ 34		$ 81
Inventories	24		24		28
Net plant and equipment	16		16		48
Goodwill and intangible assets	142		142		166
Other	5		5		28
Total assets held for sale	221		221		351
Liabilities held for sale
Accounts payable	9		9		21
Accrued expenses	10		10		17
Other	21		21		33
Total liabilities held for sale	40		40		$ 71
Operating revenue	$ 40	$ 51	$ 90	$ 102