Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Cash Flows from Operating Activities:
Net income (loss)	$ (80)	$ 70
Adjustments to reconcile net income (loss) to cash provided by operating activities:
Depreciation and amortization	39	39
Purification Solutions assets held for sale impairment charge	197
Deferred tax provision (benefit)	(36)	(2)
Employee benefit plan settlement		6
Equity in earnings of affiliated companies	(1)	0
Non-cash compensation	6	4
Other non-cash (income) expense	5	5
Changes in assets and liabilities:
Accounts and notes receivable	(57)	(76)
Inventories	(95)	(37)
Prepaid expenses and other assets	(27)	(10)
Accounts payable and accrued liabilities	9	14
Income taxes payable	3	7
Other liabilities	(12)	1
Cash provided (used) by operating activities	(49)	21
Cash Flows from Investing Activities:
Additions to property, plant and equipment	(30)	(29)
Other	1
Cash provided (used) by investing activities	(29)	(29)
Cash Flows from Financing Activities:
Proceeds from issuance (repayments) of commercial paper, net	156
Proceeds from long-term debt		50
Repayments of long-term debt	(5)	(66)
Purchases of common stock	(19)	(2)
Proceeds from sales of common stock		1
Cash dividends paid to noncontrolling interests	(8)	(1)
Cash dividends paid to common stockholders	(21)	(20)
Cash provided (used) by financing activities	103	(38)
Effects of exchange rate changes on cash	(15)	42
Increase (decrease) in cash, cash equivalents and restricted cash	10	(4)
Cash, cash equivalents and restricted cash at beginning of period	170	151
Cash, cash equivalents and restricted cash at end of period	$ 180	$ 147