Other Non-Current Assets (Detail) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Prepaid Expenses and Other Assets [Abstract]
Non-current income tax receivable—(See Note 19—Income Taxes)	$ 253
Pension asset--(See Note 10--Pension, Postretirement and Other Benefits)	192	23
Other investments - (See Note 4-Fair Value Measurements and Investments)	30	86
Long-term prepaid expenses and other	46	42
Total	$ 521	$ 151