Commitments and Contingencies (Tables)

12 Months Ended

Sep. 30, 2021

Commitments And Contingencies Disclosure [Abstract]

Schedule of Components of Purchase Commitments

For these purchase commitments, the amounts included in the table below are based on market prices as of September 30, 2021 which may differ from actual market prices at the time of purchase.

	Payments Due by Fiscal Year
	2022		2023		2024		2025		2026		Thereafter		Total
	(In millions)
Reinforcement Materials	$	205	$	156	$	155	$	155	$	155	$	1,550	$	2,376
Performance Chemicals		53		30		31		30		32		236	$	412
Purification Solutions		2		—		—		—		—		—		2
Total	$	260	$	186	$	186	$	185	$	187	$	1,786	$	2,790