Derivative Instruments and Hedging Activities (Textuals) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Jul. 20, 2020	Sep. 29, 2019	Dec. 31, 2018
Derivative Instruments and Hedging Activities (Textuals)
Interest expense	$ 195.3	$ 292.7	$ 202.9
Notional Amount of Derivatives Early Terminated				$ 625.0
Payment for Termination of Interest Rate Derivative Instruments	6.2
Interest Rate Swap
Derivative Instruments and Hedging Activities (Textuals)
Notional amount of pay-fixed receive-variable interest rate swaps					$ 500.0	$ 250.0
Interest expense	$ 8.4	$ 14.3	$ 3.4