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Revenue Recognition - Disaggregated revenues (Details) - USD ($) $ in Millions | 3 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021
Revenue Recognition |  |
Total revenue | $ 3,382.4 | $ 3,266.7
Cost reimbursable |  |
Revenue Recognition |  |
Total revenue | 1,514.9 | 1,307.6
Guaranteed maximum price |  |
Revenue Recognition |  |
Total revenue | 1,088.2 | 1,067.7
Fixed price |  |
Revenue Recognition |  |
Total revenue | 779.3 | 891.4
Americas |  |
Revenue Recognition |  |
Total revenue | 2,579.6 | 2,464.2
Europe, Middle East, India, Africa |  |
Revenue Recognition |  |
Total revenue | 448.0 | 440.9
Asia-Australia-Pacific |  |
Revenue Recognition |  |
Total revenue | $ 354.8 | $ 361.6

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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. + References No definition available. + Details
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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. + References No definition available. + Details
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- Details
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- Details
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- Details
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- Details
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