Changes in Stockholders' Equity (Schedule of Comprehensive Income for Noncontrolling Interest) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest [Abstract]
Net income (loss)	$ 0.8	$ (1.3)	$ (7.3)	$ (1.1)
Other comprehensive (loss) income:
Foreign currency translation adjustments	(2.2)	(0.7)	(5.4)	1.5
Total comprehensive (loss) income	$ (1.4)	$ (2.0)	$ (12.7)	$ 0.4