Other Financial Information (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Cash income taxes paid (collected), net of refunds	$ (0.5)	$ 0.7
Interest paid, net of amounts capitalized	$ 14.7	$ 16.2