Derivative Financial Instruments - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | ||
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Sep. 30, 2013
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Sep. 30, 2012
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Sep. 30, 2011
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Derivative [Line Items] | |||
Cash flow hedges in an asset position | $ 23 | ||
Cash flow hedges in a liability position | 13 | ||
Reduction in earnings from excluded forward points and ineffectiveness | 14 | 16 | 20 |
Expected amount of accumulated other comprehensive income (loss) expected to be reclassified | 29 | ||
Foreign exchange derivative instruments | Cash Flow Hedging
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Derivative [Line Items] | |||
The aggregate notional amount of the Company's foreign currency forward contracts outstanding | 1,100 | 690 | |
Prepaid Expense and Other Assets Current
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Derivative [Line Items] | |||
Collateral posted with counterparties | 4 | ||
Accrued Liabilities
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Derivative [Line Items] | |||
Collateral received with counterparties | $ 14 |