Other Financial Information (Narrative) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Cash income taxes paid (collected), net of refunds	$ 15.5	$ 6.5
Interest paid, net of amounts capitalized	$ 25.4	$ 25.5