Segment Information (Details) - Revenues by Segment - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Segment Reporting Information [Line Items]
Net sales	$ 892	$ 995	$ 1,778	$ 1,941
Epoxy, Phenolic and Coating Resins
Segment Reporting Information [Line Items]
Net sales	512	564	1,003	1,104
Forest Products Resins
Segment Reporting Information [Line Items]
Net sales	380	431	775	837
North America
Segment Reporting Information [Line Items]
Net sales	475	531	944	1,032
North America | Epoxy, Phenolic and Coating Resins
Segment Reporting Information [Line Items]
Net sales	216	237	425	470
North America | Forest Products Resins
Segment Reporting Information [Line Items]
Net sales	259	294	519	562
Europe
Segment Reporting Information [Line Items]
Net sales	255	301	521	600
Europe | Epoxy, Phenolic and Coating Resins
Segment Reporting Information [Line Items]
Net sales	212	249	431	494
Europe | Forest Products Resins
Segment Reporting Information [Line Items]
Net sales	43	52	90	106
Asia Pacific
Segment Reporting Information [Line Items]
Net sales	114	112	210	204
Asia Pacific | Epoxy, Phenolic and Coating Resins
Segment Reporting Information [Line Items]
Net sales	84	77	147	138
Asia Pacific | Forest Products Resins
Segment Reporting Information [Line Items]
Net sales	30	35	63	66
Latin America
Segment Reporting Information [Line Items]
Net sales	48	51	103	105
Latin America | Epoxy, Phenolic and Coating Resins
Segment Reporting Information [Line Items]
Net sales	0	1	0	2
Latin America | Forest Products Resins
Segment Reporting Information [Line Items]
Net sales	$ 48	$ 50	$ 103	$ 103