Other Current Assets - Schedule of other current assets (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Other Assets [Abstract]
Unbilled receivables	$ 118.6	$ 93.6
Income and other taxes receivable (note 12)	93.3	34.5
Prepaid expenses	39.7	35.1
Deposits with vendors	28.3	26.1
Interest rate cross-currency swap agreements (note 17)	1.9	10.7
Lease receivable	3.9	7.6
Other assets	24.3	28.9
Other current assets	$ 310.0	$ 236.5

Carrying value of amounts transferred to third parties for security purposes that are expected to be returned or applied towards payment within one year or during the operating cycle, if shorter.

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Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled within one year or normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.

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Carrying amount due within one year of the balance sheet date (or one operating cycle, if longer) from tax authorities as of the balance sheet date representing refunds of overpayments or recoveries based on agreed-upon resolutions of disputes.

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Amount, before allowance for credit loss, of net investment in sales-type and direct financing leases, classified as current.

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Amount of current assets classified as other.

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Amount of other miscellaneous assets expected to be realized or consumed within one year or operating cycle, if longer.

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Amount of asset related to consideration paid in advance for costs that provide economic benefits within a future period of one year or the normal operating cycle, if longer.

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Unbilled amounts due for services rendered or to be rendered, actions taken or to be taken, or a promise to refrain from taking certain actions in accordance with the terms of a legally binding agreement between the entity and, at a minimum, one other party. An example would be amounts associated with contracts or programs where the recognized revenue for performance thereunder exceeds the amounts billed under the terms thereof as of the date of the balance sheet.

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