Revenue Disaggregation of Revenue (Details) - USD ($) $ in Millions	1 Months Ended	2 Months Ended	3 Months Ended							4 Months Ended	8 Months Ended	12 Months Ended
	Sep. 30, 2017	Aug. 31, 2017	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2017	Aug. 31, 2017	Dec. 31, 2018	Dec. 31, 2016
Successor [Member]
Disaggregation of Revenue [Line Items]
Net Sales	$ 1,735		$ 5,741	$ 5,294	$ 8,545	$ 6,699	$ 5,318			$ 7,053		$ 26,279
Successor [Member] | Agriculture [Member]
Disaggregation of Revenue [Line Items]
Net Sales										1,596		8,995
Successor [Member] | Packaging & Specialty Plastics [Member]
Disaggregation of Revenue [Line Items]
Net Sales										544		1,579
Successor [Member] | Electronics & Imaging [Member]
Disaggregation of Revenue [Line Items]
Net Sales										743		2,097
Successor [Member] | Nutrition & Health [Member]
Disaggregation of Revenue [Line Items]
Net Sales										1,165		4,054
Successor [Member] | Industrial Biosciences [Member]
Disaggregation of Revenue [Line Items]
Net Sales										573		1,653
Successor [Member] | Transportation & Advanced Polymers [Member]
Disaggregation of Revenue [Line Items]
Net Sales										1,355		4,418
Successor [Member] | Safety & Construction [Member]
Disaggregation of Revenue [Line Items]
Net Sales										1,074		3,473
Successor [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Net Sales										$ 3		$ 10
Predecessor [Member]
Disaggregation of Revenue [Line Items]
Net Sales		$ 2,991						$ 6,971	$ 7,319		$ 17,281		$ 23,209
Predecessor [Member] | Agriculture [Member]
Disaggregation of Revenue [Line Items]
Net Sales											6,894		8,131
Predecessor [Member] | Packaging & Specialty Plastics [Member]
Disaggregation of Revenue [Line Items]
Net Sales											1,072		1,651
Predecessor [Member] | Electronics & Imaging [Member]
Disaggregation of Revenue [Line Items]
Net Sales											1,422		1,960
Predecessor [Member] | Nutrition & Health [Member]
Disaggregation of Revenue [Line Items]
Net Sales											2,129		3,268
Predecessor [Member] | Industrial Biosciences [Member]
Disaggregation of Revenue [Line Items]
Net Sales											1,022		1,500
Predecessor [Member] | Transportation & Advanced Polymers [Member]
Disaggregation of Revenue [Line Items]
Net Sales											2,608		3,599
Predecessor [Member] | Safety & Construction [Member]
Disaggregation of Revenue [Line Items]
Net Sales											2,134		3,099
Predecessor [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Net Sales											$ 0		$ 1