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Other Financial Information (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]      
Income taxes paid (collected), net $ 96.5 $ 26.9 $ 17.4
Interest paid, net of amounts capitalized $ 49.1 $ 56.6 $ 50.4