Tax Effect of Temporary Differences that Give Rise to Significant Portions of Deferred Tax Assets and Liabilities (Detail) (USD $) In Millions	Sep. 30, 2011	Sep. 30, 2010
Deferred Tax Assets
Accrued compensation and benefits	$ 96	$ 115
Comprehensive income	104	78
Investments in joint ventures	15	12
Accrued litigation obligation	128	210
Client incentives	184	179
Net operating loss carryforward	38	83
Tax credits	26	25
Federal benefit of state taxes	300	287
Federal benefit of foreign taxes	7	7
Other	76	57
Deferred tax assets	974	1,053
Deferred Tax Liabilities
Property, equipment and technology, net	(266)	(186)
Intangible assets	(4,374)	(4,396)
Foreign taxes	(40)	(21)
Other	(10)	(8)
Deferred tax liabilities	(4,690)	(4,611)
Net deferred tax liabilities	$ (3,716)	$ (3,558)