Divestitures and Other Transactions Divestitures and Other Transactions - Divested Ag Business Results of Operations (Details) - USD ($) $ in Millions		4 Months Ended	8 Months Ended	12 Months Ended
		Dec. 31, 2017	Aug. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Successor [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
(Loss) Income from discontinued operations after income taxes		$ (77)
Successor [Member] | Divested Ag Business [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Including Discontinued Operation, Transaction Costs		44
Net Sales, Discontinued Operations	[1]	199
Cost of Goods Sold, Discontinued Operations	[1]	194
Research and Development Expense, Discontinued Operations	[1]	30
Selling, General and Administrative, Discontinued Operations	[1],[2]	102
Restructuring and Asset Related Charges - Net, Discontinued Operations	[1]	(1)
Sundry Income (Expense) - Net, Discontinued Operations	[1]	(1)
(Loss) Income from Discontinued Operation, before Income Taxes	[1]	(127)
(Benefit from) Provision for Income Taxes, Discontinued Operation	[1]	(50)
(Loss) Income from discontinued operations after income taxes	[1]	$ (77)
Predecessor [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
(Loss) Income from discontinued operations after income taxes			$ 119	$ 443	$ 512
Predecessor [Member] | Divested Ag Business [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net Sales, Discontinued Operations			1,068	1,385	1,473
Cost of Goods Sold, Discontinued Operations			412	514	521
Other Operating Charges, Discontinued Operations			17	19	25
Research and Development Expense, Discontinued Operations			95	139	163
Selling, General and Administrative, Discontinued Operations			146	176	187
Restructuring and Asset Related Charges - Net, Discontinued Operations			0	(4)	15
Sundry Income (Expense) - Net, Discontinued Operations			7	1	7
(Loss) Income from Discontinued Operation, before Income Taxes			405	542	569
(Benefit from) Provision for Income Taxes, Discontinued Operation			79	103	121
(Loss) Income from discontinued operations after income taxes			$ 326	$ 439	$ 448

[1] Includes results of operations for the period September 1 through October 31, 2017, as the Divested Ag Business was disposed of on November 1, 2017.

[2] Successor period includes $44 million of transaction costs associated with the disposal of the Divested Ag Business.