Pensions and other postretirement benefit plans - Narrative (Details) $ in Millions	6 Months Ended
Jun. 30, 2026 USD ($)
Pension benefits
Defined Benefit Plan Disclosure
Contribution to the defined benefit plans	$ 0.6
Postretirement benefits
Defined Benefit Plan Disclosure
Contribution to the defined benefit plans	$ 1.9

Amount of contribution received by defined benefit plan from employer which increases plan assets.

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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