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Derivative instruments and hedging activities - Cash Flow Hedging on AOCI (Details) - Interest rate swaps - USD ($)
$ in Millions
9 Months Ended 12 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Dec. 31, 2021
Derivative Instruments and Hedging Activities Disclosures [Line Items]      
Amount of Loss Reclassified from Accumulated OCL into Income (Loss) $ 9.3   $ (6.1)
Cash Flow Hedging | Interest expense      
Derivative Instruments and Hedging Activities Disclosures [Line Items]      
Amount of Loss Reclassified from Accumulated OCL into Income (Loss) $ (1.9) $ (4.3)