Financial Instruments (Realized Gains and Losses) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Proceeds from sales	$ 132.9	$ 174.7	$ 264.8
Realized gross gains on sales	0.4	2.8	4.5
Realized gross losses on sales	$ 9.7	$ 1.7	$ 8.2