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Income Taxes - Tax Effect of Temporary Differences that Give Rise to Significant Portions of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Millions | Sep. 30, 2024 | Sep. 30, 2023
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Deferred Tax Assets: |  |
Accrued compensation and benefits | $ 221 | $ 212
Accrued litigation | 374 | 365
Client incentives | 855 | 630
Net operating loss carryforwards | 206 | 232
Comprehensive loss | 79 | 72
Federal benefit of state taxes | 16 | 125
Other | 102 | 66
Valuation allowance | (212) | (149)
Deferred tax assets | 1,641 | 1,553
Deferred Tax Liabilities: |  |
Property, equipment and technology, net | (295) | (350)
Intangible assets | (6,404) | (6,063)
Unrealized gains on equity securities | (81) | (103)
Foreign taxes | (22) | (25)
Deferred tax liabilities | (6,802) | (6,541)
Net deferred tax liabilities | $ (5,161) | $ (4,988)

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