Net revenues - Schedule of Net Revenues Disaggregated by Customer (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Segment Reporting [Line Items]
Net revenues	$ 1,343,438	$ 1,254,418	$ 2,639,510	$ 2,469,344
Advanced Technology Solutions
Segment Reporting [Line Items]
Net revenues	363,323	292,655	708,552	570,282
Core Business Services
Segment Reporting [Line Items]
Net revenues	$ 980,115	$ 961,763	$ 1,930,958	$ 1,899,062

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.

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+ Details

- 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.

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+ Details