Expected Reduction of Revenue for Volume and Support Incentive Agreements (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
Sep. 30, 2013
Commitments and Contingencies Disclosure [Abstract]
Client incentives, 2014	$ 2,450
Client incentives, 2015	2,206
Client incentives, 2016	1,802
Client incentives, 2017	1,429
Client incentives, 2018	987
Client incentives, Thereafter	1,447
Client incentives	$ 10,321

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Expected Reduction Of Volume And Support Incentives

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Expected Reduction Of Volume And Support Incentives Thereafter

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Expected Reduction Of Volume And Support Incentives Year Five

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Expected Reduction Of Volume And Support Incentives Year One

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