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Income taxes - Differences between income tax expense (benefit) in Puerto Rico - subnote (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
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Mar. 31, 2024 | Jun. 30, 2024
Reconciliation of Statutory Federal Tax Rate [Line Items] |  |
Income tax credits and adjustments | $ 22.9 | $ 22.9
Prior period correction adjustment |  |
Reconciliation of Statutory Federal Tax Rate [Line Items] |  |
Income tax credits and adjustments | $ 16.5 | $ 16.5

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- Definition Reconciliation of Statutory Federal Tax Rate [Line Items] + References No definition available. + Details
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- Definition A credit or adjustment for government or taxing authority authorized decrease in taxes owed as a result of meeting certain tax policy conditions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-28 + Details
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