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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, 2023 | Sep. 30, 2022
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Deferred Tax Assets: |  |
Accrued compensation and benefits | $ 212 | $ 172
Accrued litigation obligation | 365 | 331
Client incentives | 630 | 442
Net operating loss carryforwards | 232 | 117
Comprehensive loss | 72 | 21
Federal benefit of state taxes | 125 | 133
Other | 66 | 71
Valuation allowance | (149) | (120)
Deferred tax assets | 1,553 | 1,167
Deferred Tax Liabilities: |  |
Property, equipment and technology, net | (350) | (450)
Intangible assets | (6,063) | (5,788)
Unrealized gains on equity securities | (103) | (124)
Foreign taxes | (25) | (50)
Deferred tax liabilities | (6,541) | (6,412)
Net deferred tax liabilities | $ (4,988) | $ (5,245)

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