Earnings per Share (EPS) and Common Stock - Additional Information (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||||
|---|---|---|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
Oct. 01, 2024 |
Sep. 30, 2024 |
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| Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] | ||||||
| Anti-dilutive shares | 400,000 | 200,000 | 0 | 100,000 | ||
| Common stock, shares authorized | 500,000,000 | 500,000,000 | 500,000,000 | |||
| Stock repurchased during period (in shares) | 400,000 | 0 | 1,300,000 | 0 | ||
| Stock repurchased during period, value | $ 75 | $ 225 | ||||
| Maximum [Member] | ||||||
| Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] | ||||||
| Common stock, shares authorized | 500,000,000 | 500,000,000 | ||||
| Stock authorized to repurchase | $ 2,000 | |||||
| X | ||||||||||
- Definition Amount authorized for purchase of share under share repurchase plan. Includes, but is not limited to, repurchase of stock and unit of ownership. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The maximum number of common shares permitted to be issued by an entity's charter and bylaws. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Details
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