Earnings Per Share (Narrative) (Details) - shares shares in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Earnings Per Share [Abstract]
Weighted average shares excluded from denominator for diluted earnings per share because the stock options were anti-dilutive	0.9	0.2
Restricted stock units issued under stock incentive plan	1.2	0.5
Restricted stock units excluded from the denominator for diluted earnings per share	0.2	0.2