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Changes in Stockholders' Equity (Schedule of Comprehensive Income (Loss) attributable to Noncontrolling Interests) (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Stockholders' Equity Note [Abstract]    
Net (loss) income $ (14.8) $ 0.6
Other comprehensive income (loss):    
Foreign currency translation adjustments 0.8 (0.4)
Total comprehensive (loss) income $ (14.0) $ 0.2