Other Current Liabilities (Details 1) (USD $) In Millions, unless otherwise specified	6 Months Ended
Mar. 31, 2012	Mar. 31, 2011	Sep. 30, 2011
Total product warranties - beginning of period	$ 46	$ 54
Accruals for product warranties	10	12
Payments	(7)	(11)
Change in estimates and other	(5)	(2)
Total product warranties - end of period	44	53
Less: Non-current product warranties (see Note 16)	(29)	(25)	(29)
Product warranties - current	$ 17	$ 28	$ 19

Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers.

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