Earnings (Loss) Per Share - Computation of Basic and Diluted Earnings (Loss) per Share (Details) - USD ($) $ / shares in Units, $ in Millions |
3 Months Ended | 9 Months Ended | ||||
|---|---|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|||
| Numerator | ||||||
| Numerator for basic and diluted EPS - Income (loss) from continuing operations, net of tax | $ 41 | $ (719) | $ 42 | $ (855) | ||
| Denominator | ||||||
| Denominator for basic EPS - Weighted-average common shares outstanding | 46 | 46 | 46 | 47 | ||
| Share based awards convertible to common shares | [1] | 0 | 0 | 0 | 0 | |
| Denominator for diluted EPS - Adjusted weighted-average shares and assumed conversions | 46 | 46 | 46 | 47 | ||
| EPS from continuing operations | ||||||
| Basic | $ 0.89 | $ (15.7) | $ 0.91 | $ (18.39) | ||
| Diluted | [1] | $ 0.89 | $ (15.7) | $ 0.91 | $ (18.39) | |
| ||||||
| X | ||||||||||
- Definition Denominator. No definition available.
|
| X | ||||||||||
- Definition Earnings Per Share from Continuing Operations [Abstract] No definition available.
|
| X | ||||||||||
- Definition Numerator. No definition available.
|
| X | ||||||||||
- Definition Amount after tax of income (loss) from continuing operations attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition The amount of net income (loss) from continuing operations per each share of common stock or unit outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition The amount of net income (loss) derived from continuing operations during the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|