Derivative Instruments (Net Cash Received (Paid) Related to Derivatives) (Schedule) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Operating activities	$ (51.7)	$ (215.5)
Investing activities	(61.7)	(28.7)
Financing activities	23.1	72.6
Total	$ (90.3)	$ (171.6)