Segment Information (Details) - Revenues by Segment - USD ($) $ in Millions		3 Months Ended		6 Months Ended	9 Months Ended
	Jul. 01, 2019	Sep. 30, 2019	Sep. 30, 2018	Jun. 30, 2019	Sep. 30, 2018
Segment Reporting Information [Line Items]
Net sales	$ 0	$ 836	$ 952	$ 1,778	$ 2,893
Epoxy, Phenolic and Coating Resins
Segment Reporting Information [Line Items]
Net sales	0	469	521	1,003	1,625
Forest Products Resins
Segment Reporting Information [Line Items]
Net sales	0	367	431	775	1,268
North America
Segment Reporting Information [Line Items]
Net sales	0	454	519	944	1,551
North America | Epoxy, Phenolic and Coating Resins
Segment Reporting Information [Line Items]
Net sales	0	206	225	425	695
North America | Forest Products Resins
Segment Reporting Information [Line Items]
Net sales	0	248	294	519	856
Europe
Segment Reporting Information [Line Items]
Net sales	0	226	264	521	864
Europe | Epoxy, Phenolic and Coating Resins
Segment Reporting Information [Line Items]
Net sales	0	184	215	431	709
Europe | Forest Products Resins
Segment Reporting Information [Line Items]
Net sales	0	42	49	90	155
Asia Pacific
Segment Reporting Information [Line Items]
Net sales	0	109	115	210	319
Asia Pacific | Epoxy, Phenolic and Coating Resins
Segment Reporting Information [Line Items]
Net sales	0	79	80	147	218
Asia Pacific | Forest Products Resins
Segment Reporting Information [Line Items]
Net sales	0	30	35	63	101
Latin America
Segment Reporting Information [Line Items]
Net sales	0	47	54	103	159
Latin America | Epoxy, Phenolic and Coating Resins
Segment Reporting Information [Line Items]
Net sales	0	0	1	0	3
Latin America | Forest Products Resins
Segment Reporting Information [Line Items]
Net sales	$ 0	$ 47	$ 53	$ 103	$ 156