Financial Instruments (Realized Gains and Losses) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Proceeds from sales	$ 34.2	$ 29.9	$ 61.8	$ 65.1
Realized gross gains on sales	0.1	0.1	0.3	0.2
Realized gross losses on sales	$ 1.0	$ 0.7	$ 1.7	$ 1.5