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Tax Effect of Temporary Differences that Give Rise to Significant Portions of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Millions | Sep. 30, 2017 | Sep. 30, 2016
--- | --- | ---
Deferred Tax Assets |  |
Accrued compensation and benefits | $ 194 | $ 277
Comprehensive loss | 29 | 106
Accrued litigation obligation | 373 | 373
Client incentives | 272 | 266
Net operating loss carryforwards | 45 | 32
Federal benefit of state taxes | 236 | 195
Federal benefit of foreign taxes | 0 | 1,214
Other | 193 | 280
Valuation allowance | 35 | 31
Deferred tax assets | 1,307 | 2,712
Deferred Tax Liabilities |  |
Property, equipment and technology, net | (391) | (278)
Intangible assets | (6,756) | (7,013)
Foreign taxes | (59) | (106)
Other | 0 | (101)
Deferred tax liabilities | (7,206) | (7,498)
Net deferred tax liabilities | $ (5,899) | $ (4,786)

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- Definition Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b),(c) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
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