Derivatives (Details) - Foreign Currency Forward £ in Millions, $ in Millions	Mar. 31, 2024 GBP (£)	Mar. 31, 2024 USD ($)	Dec. 31, 2023 GBP (£)	Dec. 31, 2023 USD ($)
Derivative [Line Items]
Derivative asset, notional amount \| £	£ 56.8		£ 28.8
Derivative assets \| $		$ 0.9		$ 1.6
Derivative liability, notional amount \| £	£ 26.8		£ 55.5
Derivative liabilities \| $		$ 1.3		$ 0.3

Nominal or face amount used to calculate payments on the derivative asset.

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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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Fair value, after the effects of master netting arrangements, of a financial liability or 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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- Definition

Nominal or face amount used to calculate payments on the derivative liability.

+ References

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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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