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Related Party Transactions (Details) $ in Millions	Jun. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)
Related Party Transactions
Other liabilities	$ 529.7	$ 466.3
Common stock, voting rights, percent	0.05
Related Party
Related Party Transactions
Other liabilities	$ 53.9	53.9
Related Party | Private Equity Investment Partnerships of Affiliate
Related Party Transactions
Other liabilities	$ 17.6	$ 18.5

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