Derivatives - Classification and fair value of derivatives (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Derivative [Line Items]
Derivative liabilities at fair value	$ 3.2	$ 1.0
Derivatives not designated as hedging instruments | Foreign currency swaps
Derivative [Line Items]
Notional Value	40.0
Derivatives not designated as hedging instruments | Foreign currency swaps | Other assets
Derivative [Line Items]
Derivative assets at fair value	0.0
Derivatives not designated as hedging instruments | Foreign currency swaps | Accounts payable, accrued expenses and other liabilities
Derivative [Line Items]
Derivative liabilities at fair value	1.7
Derivatives not designated as hedging instruments | Foreign currency forwards
Derivative [Line Items]
Notional Value	83.6
Derivatives not designated as hedging instruments | Foreign currency forwards | Other assets
Derivative [Line Items]
Derivative assets at fair value	0.0
Derivatives not designated as hedging instruments | Foreign currency forwards | Accounts payable, accrued expenses and other liabilities
Derivative [Line Items]
Derivative liabilities at fair value	1.3
Derivatives not designated as hedging instruments | Foreign currency futures contracts
Derivative [Line Items]
Notional Value	133.9
Derivatives not designated as hedging instruments | Foreign currency futures contracts | Other assets
Derivative [Line Items]
Derivative assets at fair value	0.2
Derivatives not designated as hedging instruments | Foreign currency futures contracts | Accounts payable, accrued expenses and other liabilities
Derivative [Line Items]
Derivative liabilities at fair value	0.0
Derivatives not designated as hedging instruments | Weather derivatives
Derivative [Line Items]
Notional Value	6.2
Derivatives not designated as hedging instruments | Weather derivatives | Other assets
Derivative [Line Items]
Derivative assets at fair value	0.0
Derivatives not designated as hedging instruments | Weather derivatives | Accounts payable, accrued expenses and other liabilities
Derivative [Line Items]
Derivative liabilities at fair value	0.8
Derivatives not designated as hedging instruments | Equity warrants
Derivative [Line Items]
Notional Value	0.1
Derivatives not designated as hedging instruments | Equity warrants | Other assets
Derivative [Line Items]
Derivative assets at fair value	0.1
Derivatives not designated as hedging instruments | Equity warrants | Accounts payable, accrued expenses and other liabilities
Derivative [Line Items]
Derivative liabilities at fair value	0.0
Derivatives not designated as hedging instruments | Interest rate cap
Derivative [Line Items]
Notional Value	250.0
Derivatives not designated as hedging instruments | Interest rate cap | Other assets
Derivative [Line Items]
Derivative assets at fair value	0.0
Derivatives not designated as hedging instruments | Interest rate cap | Accounts payable, accrued expenses and other liabilities
Derivative [Line Items]
Derivative liabilities at fair value	$ 0.0