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Derivative Instruments - Summary of Derivative Financial Instruments (Details) € in Millions, $ in Millions	Dec. 31, 2023 property	Dec. 31, 2023 derivative	Dec. 31, 2023 USD ($)	Dec. 31, 2023	Dec. 31, 2023 Rate	Dec. 31, 2022 USD ($)	Oct. 31, 2022 USD ($) derivative	Oct. 31, 2022 EUR (€) derivative
Derivative [Line Items]
Notional amount			$ 5,202.9			$ 3,463.2
Fair Value - asset (liability)			(98.5)			17.7
Designated as hedging instrument
Derivative [Line Items]
Notional amount			3,392.3			755.5
Fair Value - asset (liability)			(107.4)			(11.6)
Not designated as hedging instrument
Derivative [Line Items]
Notional amount			1,810.6			2,707.7
Fair Value - asset (liability)			8.9			29.3
Interest rate swaps \| Designated as hedging instrument
Derivative [Line Items]
Number of swaps executed \| derivative		9
Notional amount			1,630.0			250.0
Weighted Average Strike Rate				4.26%
Fair Value - asset (liability)			0.3			5.6
Interest rate swaps \| Designated as hedging instrument \| Cash flow hedge
Derivative [Line Items]
Number of swaps executed \| property	3
Interest rate swaptions \| Designated as hedging instrument
Derivative [Line Items]
Number of swaps executed \| derivative		6
Notional amount			1,000.0			0.0
Fair Value - asset (liability)			2.6			0.0
Interest rate swaptions \| Designated as hedging instrument \| Fair value hedge
Derivative [Line Items]
Weighted Average Strike Rate				5.625%
Interest rate swaptions \| Designated as hedging instrument \| Net Investment Hedging
Derivative [Line Items]
Weighted Average Strike Rate				5.625%
Cross-currency swaps \| Designated as hedging instrument \| Fair value hedge
Derivative [Line Items]
Number of swaps executed \| derivative		3
Notional amount			320.0			320.0
Weighted Average Strike Rate				4.681%
Fair Value - asset (liability)			(59.8)			(33.3)
Cross-currency swaps \| Designated as hedging instrument \| Net Investment Hedging
Derivative [Line Items]
Number of swaps executed \| derivative		3
Notional amount			280.0			0.0
Weighted Average Strike Rate				4.716%
Fair Value - asset (liability)			(53.2)			0.0
Cross-currency swaps \| Designated as hedging instrument \| Cash flow hedge
Derivative [Line Items]
Number of swaps executed \| derivative							6	6
Notional amount							$ 600.0	€ 612.0
Cross-currency swaps \| Not designated as hedging instrument
Derivative [Line Items]
Number of swaps executed	3	0
Notional amount			0.0			280.0
Fair Value - asset (liability)			0.0			(29.5)
Cross-currency swaps \| Not designated as hedging instrument \| Net Investment Hedging
Derivative [Line Items]
Notional amount			280.0
Foreign currency forwards \| Designated as hedging instrument
Derivative [Line Items]
Number of swaps executed \| derivative		22
Notional amount			162.3			185.5
Fair Value - asset (liability)			2.7			16.1
Weighted average forward exchange rate \| Rate					1.30%
Currency exchange swaps \| Not designated as hedging instrument
Derivative [Line Items]
Number of swaps executed \| derivative		4
Notional amount			1,810.6			2,427.7
Fair Value - asset (liability)			$ 8.9			$ 58.8
GBP currency exchange swap \| Not designated as hedging instrument
Derivative [Line Items]
Weighted average forward exchange rate \| Rate					1.27%
EUR currency exchange swap \| Not designated as hedging instrument
Derivative [Line Items]
Weighted average forward exchange rate \| Rate					0.86%
Interest Rate Swaption, Purchased \| Designated as hedging instrument
Derivative [Line Items]
Fixed strike rate				3.75%
Interest Rate Swaption, Sold \| Designated as hedging instrument
Derivative [Line Items]
Fixed strike rate				4.25%