Goodwill and intangible assets - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Intangible Asset, Goodwill and Other [Abstract]
Amortization of intangible assets	$ 22.1	$ 26.4	$ 66.8	$ 71.8

Amount of amortization expense for finite-lived intangible asset. Excludes goodwill and capitalized cost for software to be sold, leased, or marketed.

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+ Details