Revenue Recognition - Effect of Changes in Contract Estimates (Details) - USD ($) $ / shares in Units, $ in Thousands |
12 Months Ended | ||
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Sep. 30, 2023 |
Sep. 30, 2022 |
Sep. 30, 2021 |
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| Disaggregation of Revenue [Line Items] | |||
| Benefit to/(reduction of) revenue recognized due to changes in contract estimates | $ 4,904,728 | $ 4,631,018 | $ 4,254,485 |
| Benefit to/(reduction of) diluted earnings per share recognized due to changes in contract estimates (in dollars per share) | $ 2.63 | $ 3.29 | $ 4.67 |
| Change in contract estimates | |||
| Disaggregation of Revenue [Line Items] | |||
| Benefit to/(reduction of) revenue recognized due to changes in contract estimates | $ (13,346) | $ (2,500) | |
| Benefit to/(reduction of) diluted earnings per share recognized due to changes in contract estimates (in dollars per share) | $ (0.16) | $ (0.03) | |
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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 The amount of net income (loss) for 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
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- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Details
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