Revenue Disaggregation of Revenue - Principal Product Groups (Details) - Successor [Member] - USD ($) $ in Millions	1 Months Ended	3 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2018
Disaggregation of Revenue [Line Items]
Net Sales	$ 1,735	$ 5,294	$ 20,538
Agriculture [Member]
Disaggregation of Revenue [Line Items]
Net Sales		994	7,395
Packaging & Specialty Plastics [Member]
Disaggregation of Revenue [Line Items]
Net Sales		389	1,224
Electronics & Imaging [Member]
Disaggregation of Revenue [Line Items]
Net Sales		518	1,598
Nutrition & Health [Member]
Disaggregation of Revenue [Line Items]
Net Sales		1,000	3,081
Industrial Biosciences [Member]
Disaggregation of Revenue [Line Items]
Net Sales		407	1,242
Transportation & Advanced Polymers [Member]
Disaggregation of Revenue [Line Items]
Net Sales		1,111	3,374
Safety & Construction [Member]
Disaggregation of Revenue [Line Items]
Net Sales		873	2,617
Other [Member]
Disaggregation of Revenue [Line Items]
Net Sales		$ 2	$ 7