Stockholders' Equity Reconciliation of Common Stock Share Activity (Details) - shares		8 Months Ended	12 Months Ended	16 Months Ended
		Aug. 31, 2017	Dec. 31, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2015
Class of Stock [Line Items]
Treasury Stock Shares, End of Period				0
Predecessor [Member]
Class of Stock [Line Items]
Common Stock, Shares, Outstanding		868,338,000	950,044,000			958,388,000
Shares Issued During Period		5,335,000	4,808,000
Shares Repurchased and Retired During Period			(13,152,000)
Shares Retired During the Period		(87,041,000)
Treasury Stock Shares, Beginning of Period		(87,041,000)	(87,041,000)	0
Treasury Stock Shares Repurchased During Period			(13,152,000)
Treasury Stock Shares Retired During Period		87,041,000	13,152,000
Treasury Stock Shares, End of Period		0	(87,041,000)
Successor [Member]
Class of Stock [Line Items]
Common Stock, Shares, Outstanding	[1]	100		100	100
Shares Issued During Period				0
Treasury Stock Shares, Beginning of Period				0
Treasury Stock Shares, End of Period		0

[1] ll of the company's issued and outstanding common stock is held by the DowDuPont Inc