Discontinued Operations - Reconciliation of Consolidated Income (Loss) From Discontinued Operations (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Income(loss) from discontinued operations attributable to Composites/Marl facility disposal group
Pretax income of discontinued operations	$ 1,068	$ 25	$ 68
Income from discontinued operations	746	47	47
Performance Adhesives [Member]
Income(loss) from discontinued operations attributable to Composites/Marl facility disposal group
Sales	171	372	310
Cost of sales	(122)	(256)	(202)
Selling, general and administrative expense	(12)	(25)	(24)
Research and development expense	(4)	(8)	(8)
Intangible amortization expense	0	(1)	(1)
Pretax operating income of discontinued operations	33	82	75
Other net periodic benefit income (loss)	0	1	(1)
Pretax income of discontinued operations	33	83	74
Benefit (expense) related to income (loss) from discontinued operations	8	(19)	(10)
Income from discontinued operations	$ 41	$ 64	64
Composites/Marl facility [Member]
Income(loss) from discontinued operations attributable to Composites/Marl facility disposal group
Sales			51
Cost of sales			(35)
Selling, general and administrative expense			(9)
Equity and other income			2
Pretax income of discontinued operations			9
Benefit (expense) related to income (loss) from discontinued operations			(5)
Income from discontinued operations			$ 4