Consolidated Statements of Cash Flows - USD ($) $ in Millions		12 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2016
Cash Flows from Operating Activities:
Net income (loss)		$ (74)	$ 273	$ 162
Adjustments to reconcile net income (loss) to cash provided by operating activities:
Depreciation and amortization		149	155	161
Long-lived assets impairment charge (Note F)		162		23
Goodwill impairment charge	[1]	92
Deferred tax provision (benefit)		91	(31)	(36)
Gain on sale of land		(39)
Gain on sale of investments		(10)
Equity in net income of affiliated companies		(2)	(7)	(3)
Non-cash compensation		22	16	17
Other non-cash (income) expense		16	(3)	5
Changes in assets and liabilities:
Accounts and notes receivable		(127)	(64)	25
Inventories		(105)	(61)	54
Prepaid expenses and other current assets		(27)	(14)	1
Accounts payable and accrued liabilities		122	91	(27)
Income taxes payable		7	(2)	(4)
Other liabilities		12	(16)	5
Cash dividends received from equity affiliates		9	11	9
Cash provided by operating activities		298	348	392
Cash Flows from Investing Activities:
Additions to property, plant and equipment		(229)	(147)	(112)
Proceeds from the sale of land		39		16
Change in assets held for rent		(3)	(6)	(8)
Cash paid for acquisition of business, net of cash acquired of $1, $— and $—		(64)
Proceeds from sales of investments		11
Other			4
Cash used in investing activities		(246)	(149)	(104)
Cash Flows from Financing Activities:
Borrowings under financing arrangements			1
Repayments under financing arrangements		(4)	(3)	(3)
Increase in short-term borrowings, net		(4)	2
Proceeds (repayments) from issuance of commercial paper, net		249		(12)
Proceeds from long-term debt, net of issuance costs		90		248
Repayments of long-term debt		(251)	(2)	(301)
Purchases of common stock		(142)	(61)	(45)
Proceeds from sales of common stock		22	21	10
Cash dividends paid to noncontrolling interests		(21)	(14)	(16)
Cash dividends paid to common stockholders		(80)	(77)	(65)
Cash used in financing activities		(141)	(133)	(184)
Effects of exchange rate changes on cash		(16)	14	19
Increase (decrease) in cash and cash equivalents		(105)	80	123
Cash and cash equivalents at beginning of year		280	200	77
Cash and cash equivalents at end of year		175	280	200
Income taxes paid		84	69	66
Interest paid		$ 47	$ 48	$ 51

[1] Refer to Note F for details on the Purification Solutions goodwill impairment test and the resulting impairment charge recorded in the second fiscal quarter of 2018. Based on the Company’s most recent annual goodwill impairment test performed as of May 31, 2018, the fair values of the Reinforcement Materials, Fumed Metal Oxides, and Specialty Compounds reporting units were substantially in excess of their carrying values.