Segment Information (Details) - Revenues by Segment - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Segment Reporting Information [Line Items]
Net sales	$ 995	$ 912	$ 1,941	$ 1,782
Epoxy, Phenolic and Coating Resins
Segment Reporting Information [Line Items]
Net sales	564	517	1,104	1,009
Forest Products Resins
Segment Reporting Information [Line Items]
Net sales	431	395	837	773
North America
Segment Reporting Information [Line Items]
Net sales	531	475	1,032	927
North America | Epoxy, Phenolic and Coating Resins
Segment Reporting Information [Line Items]
Net sales	237	207	470	408
North America | Forest Products Resins
Segment Reporting Information [Line Items]
Net sales	294	268	562	519
Europe
Segment Reporting Information [Line Items]
Net sales	301	271	600	541
Europe | Epoxy, Phenolic and Coating Resins
Segment Reporting Information [Line Items]
Net sales	249	223	494	445
Europe | Forest Products Resins
Segment Reporting Information [Line Items]
Net sales	52	48	106	96
Asia Pacific
Segment Reporting Information [Line Items]
Net sales	112	119	204	217
Asia Pacific | Epoxy, Phenolic and Coating Resins
Segment Reporting Information [Line Items]
Net sales	77	85	138	152
Asia Pacific | Forest Products Resins
Segment Reporting Information [Line Items]
Net sales	35	34	66	65
Latin America
Segment Reporting Information [Line Items]
Net sales	51	47	105	97
Latin America | Epoxy, Phenolic and Coating Resins
Segment Reporting Information [Line Items]
Net sales	1	2	2	4
Latin America | Forest Products Resins
Segment Reporting Information [Line Items]
Net sales	$ 50	$ 45	$ 103	$ 93