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v3.23.2

Equity - Narrative (Detail) - USD ($) shares in Thousands, $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |
Non-cash stock-based compensation expense | $ 7 |  | $ 42 | $ 35
Share-based compensation liability |  | $ 5 |  | 5
Share-Based Payment Arrangement, Tranche Two |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |
Share-based compensation liability | 15 |  | 15 |
Restricted Stock Units (RSUs) |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |
Non-cash stock-based compensation expense |  |  | 12 |
Restricted Stock Units (RSUs) | Restructuring Plan |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |
Non-cash stock-based compensation expense |  |  | 2 |
Performance Share Units (PSUs) |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |
Non-cash stock-based compensation expense | 1 |  | 2 |
Additional Paid-in Capital |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |
Non-cash stock-based compensation expense |  |  | 27 | $ 30
Additional Paid-in Capital | Share-Based Payment Arrangement, Tranche Two |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |
Share-based compensation liability | 5 |  | 5 |
Additional Paid-in Capital | Restricted Stock Units (RSUs) |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |
Non-cash stock-based compensation expense | $ 2 |  | $ 12 |
Common Stock | Class A Common Stock |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |
Shares issued under the Plan (in shares) |  |  | 869 |
Shares issued under Omnibus Incentive Plan (in shares) | 17 | 1 | 273 | 187

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