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Income taxes - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Dec. 31, 2023
Income Tax Disclosure [Abstract] |  |  |  |
Estimated annual effective tax rate percent (as a percent) | 0.90% | 159.40% |  |
Unrecognized tax benefits that would impact effective tax rate | $ 44.6 |  | $ 44.6 | $ 52.6
Release of uncertain tax position reserves |  |  | 11.1 |
Interest and penalties related to an IRS audit |  |  | 4.7 |
Unrecognized tax benefits, accrued interest and penalties | $ 0.1 |  | $ 0.1 | $ 4.6

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- Definition The sum of the amounts of estimated penalties and interest recognized in the period arising from income tax examinations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 15 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-15 + Details
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- Definition Amount of increase (decrease) in unrecognized tax benefits attributable to uncertain tax positions taken in tax returns. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 15A -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-15A + Details
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