Derivative Instruments - Schedule of Derivative Financial Instruments (Details) $ in Millions	Mar. 31, 2025 USD ($) derivative Rate	Dec. 31, 2024 USD ($)
Derivative [Line Items]
Notional Amount	$ 5,629.4	$ 4,854.8
Fair Value - asset (liability)	(82.1)	(34.4)
Designated as hedging instrument
Derivative [Line Items]
Notional Amount	3,466.8	3,129.5
Fair Value - asset (liability)	(78.3)	(46.2)
Not designated as hedging instrument
Derivative [Line Items]
Notional Amount	2,162.6	1,725.3
Fair Value - asset (liability)	$ (3.8)	11.8
Interest rate swaps \| Designated as hedging instrument
Derivative [Line Items]
Number of Instruments \| derivative	10
Notional Amount	$ 2,180.0	2,180.0
Weighted Average Strike Rate	3.40%
Fair Value - asset (liability)	$ 15.0	24.3
Interest rate swaptions \| Designated as hedging instrument
Derivative [Line Items]
Number of Instruments \| derivative	3
Notional Amount	$ 250.0	0.0
Fair Value - asset (liability)	$ (0.3)	0.0
Interest Rate Swaption, Purchased \| Designated as hedging instrument
Derivative [Line Items]
Fixed strike rate	3.962%
Interest Rate Swaption, Sold \| Designated as hedging instrument
Derivative [Line Items]
Fixed strike rate	3.662%
Cross-currency swaps \| Designated as hedging instrument \| Fair value hedge
Derivative [Line Items]
Number of Instruments \| derivative	3
Notional Amount	$ 320.0	320.0
Fair Value - asset (liability)	$ (47.1)	(42.2)
Cross-currency swaps \| Designated as hedging instrument \| Net Investment Hedging
Derivative [Line Items]
Number of Instruments \| derivative	3
Notional Amount	$ 280.0	280.0
Fair Value - asset (liability)	$ (42.0)	(37.6)
Currency Swap, USD \| Designated as hedging instrument \| Fair value hedge
Derivative [Line Items]
Weighted Average Strike Rate	5.625%
Currency Swap, USD \| Designated as hedging instrument \| Net Investment Hedging
Derivative [Line Items]
Weighted Average Strike Rate	5.625%
Currency Swap, EUR \| Designated as hedging instrument \| Fair value hedge
Derivative [Line Items]
Weighted Average Strike Rate	4.681%
Currency Swap, EUR \| Designated as hedging instrument \| Net Investment Hedging
Derivative [Line Items]
Weighted Average Strike Rate	4.716%
Foreign currency forwards \| Designated as hedging instrument
Derivative [Line Items]
Number of Instruments \| derivative	34
Notional Amount	$ 436.8	349.5
Fair Value - asset (liability)	$ (3.9)	9.3
Weighted average forward exchange rate \| Rate	128.00%
Currency exchange swaps \| Not designated as hedging instrument
Derivative [Line Items]
Number of Instruments \| derivative	5
Notional Amount	$ 2,162.6	1,725.3
Fair Value - asset (liability)	$ (3.8)	$ 11.8
EUR currency exchange swap \| Not designated as hedging instrument
Derivative [Line Items]
Weighted average forward exchange rate \| Rate	84.00%
GBP currency exchange swap \| Not designated as hedging instrument
Derivative [Line Items]
Weighted average forward exchange rate \| Rate	129.00%

Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments.

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The number of derivative instruments of a particular group held by the entity.

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Fixed interest rate that will be received or paid upon exercise of the interest rate swaption contract.

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