Supplemental balance sheet and cash flow information (trade accounts receivable, allowance for credit losses) (Details) - USD ($) $ in Millions |
3 Months Ended | ||||
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Mar. 31, 2026 |
Mar. 31, 2025 |
Dec. 31, 2025 |
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| Trade accounts receivable | |||||
| Trade accounts receivable - gross | [1] | $ 186.7 | $ 196.3 | ||
| Allowance for credit losses | (8.6) | (8.7) | |||
| Trade accounts receivable - net | 178.1 | 187.6 | |||
| Unbilled receivables | 56.2 | $ 53.5 | |||
| Changes in allowance for credit losses | |||||
| Balance, beginning of year | 8.7 | $ 9.1 | |||
| Bad debt expense | 2.0 | 1.8 | |||
| Write-offs and other | (2.1) | (1.8) | |||
| Balance, end of period | $ 8.6 | $ 9.1 | |||
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- Definition Amount, before allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- References No definition available.
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- Definition Amount of allowance for credit loss on accounts receivable. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of allowance for credit loss on accounts receivable, classified as current. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
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- Definition Amount of direct write-downs of accounts receivable charged against the allowance. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of expense (reversal of expense) for expected credit loss on accounts receivable. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount received for services rendered and products shipped, but not yet billed, for non-contractual agreements due within one year or the normal operating cycle, if longer. No definition available.
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