Consolidated Balance Sheets (USD $) In Millions	Jun. 30, 2011	Sep. 30, 2010
Current assets:
Cash and cash equivalents	$ 344	$ 387
Accounts and notes receivable, net of reserve for doubtful accounts of $5 and $4	697	576
Inventories:
Raw materials	133	121
Work in process	9	38
Finished goods	249	178
Other	43	36
Total inventories	434	373
Prepaid expenses and other current assets	73	72
Deferred income taxes	32	30
Total current assets	1,580	1,438
Property, plant and equipment	3,141	2,943
Accumulated depreciation and amortization	(2,111)	(1,968)
Net property, plant and equipment	1,030	975
Goodwill	41	39
Equity affiliates	58	61
Intangible assets, net of accumulated amortization of $13 and $12	4	4
Assets held for rent	46	40
Deferred income taxes	255	245
Other assets	88	84
Total assets	3,102	2,886
Current liabilities:
Notes payable to banks	61	29
Accounts payable and accrued liabilities	429	447
Income taxes payable	20	34
Deferred income taxes	6	6
Current portion of long-term debt	26	23
Total current liabilities	542	539
Long-term debt	578	600
Deferred income taxes	6	6
Other liabilities	341	324
Commitments and contingencies (Note E)
Preferred stock:
Authorized: 2,000,000 shares of $1 par value Issued and Outstanding : None and none
Common stock:
Authorized: 200,000,000 shares of $1 par value, Issued: 65,439,772 and 65,429,916 shares, Outstanding: 65,406,101 and 65,370,220 shares	65	65
Less cost of 33,671 and 59,696 shares of common treasury stock	(1)	(2)
Additional paid-in capital	60	46
Retained earnings	1,276	1,125
Deferred employee benefits	(16)	(20)
Accumulated other comprehensive income	126	88
Total Cabot Corporation stockholders' equity	1,510	1,302
Noncontrolling interests	125	115
Total stockholders' equity	1,635	1,417
Total liabilities and stockholders' equity	$ 3,102	$ 2,886