Summary of significant accounting policies - Strategic Investments (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Accounting Policies [Abstract]
Balance of strategic investments	$ 8.5		$ 5.4
Changes in carrying value of strategic investments	$ 0.0	$ 0.0

Cost of the investment.

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+ Details