Revenue Disaggregation of Revenue - Principal Product Groups (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Disaggregation of Revenue [Line Items]
Net Sales	$ 6,288	$ 6,699
Agriculture [Member]
Disaggregation of Revenue [Line Items]
Net Sales	2,108	2,343
Packaging & Specialty Plastics [Member]
Disaggregation of Revenue [Line Items]
Net Sales	363	419
Electronics & Imaging [Member]
Disaggregation of Revenue [Line Items]
Net Sales	455	527
Nutrition & Health [Member]
Disaggregation of Revenue [Line Items]
Net Sales	1,014	1,024
Industrial Biosciences [Member]
Disaggregation of Revenue [Line Items]
Net Sales	376	406
Transportation & Advanced Polymers [Member]
Disaggregation of Revenue [Line Items]
Net Sales	1,071	1,121
Safety & Construction [Member]
Disaggregation of Revenue [Line Items]
Net Sales	899	855
Other [Member]
Disaggregation of Revenue [Line Items]
Net Sales	$ 2	$ 4