Divestitures and Other Transactions Divestitures and Other Transactions - Divested Ag Business Depreciation and Capital Expenditures (Details) - Divested Ag Business [Member] - USD ($) $ in Millions	1 Months Ended	2 Months Ended	8 Months Ended
	Sep. 30, 2017	Aug. 31, 2017	Aug. 31, 2017
Successor [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Depreciation, Discontinued Operations	$ 0
Capital Expenditures, Discontinued Operations	$ 4
Predecessor [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Depreciation, Discontinued Operations		$ 5	$ 21
Capital Expenditures, Discontinued Operations		$ 0	$ 8