Accumulated Other Comprehensive Loss (By Component) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Accumulated other comprehensive income (loss), net of tax, beginning of period	$ (171.3)	$ (167.2)
Other comprehensive income (loss) before reclassifications	(6.0)	(23.6)
Amounts reclassified from accumulated other comprehensive loss to net earnings (loss)	1.8	0.0
Other comprehensive loss, net of tax	(4.2)	(23.6)
Accumulated other comprehensive income (loss), net of tax, end of period	(175.5)	(190.8)
Translation Adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Accumulated other comprehensive income (loss), net of tax, beginning of period	(130.8)	(131.0)
Other comprehensive income (loss) before reclassifications	(6.0)	(15.3)
Amounts reclassified from accumulated other comprehensive loss to net earnings (loss)	0.0	0.0
Other comprehensive loss, net of tax	(6.0)	(15.3)
Accumulated other comprehensive income (loss), net of tax, end of period	(136.8)	(146.3)
Interest Rate Swap Adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Accumulated other comprehensive income (loss), net of tax, beginning of period	(12.3)	(4.7)
Other comprehensive income (loss) before reclassifications	0.0	(8.3)
Amounts reclassified from accumulated other comprehensive loss to net earnings (loss)	1.8	0.0
Other comprehensive loss, net of tax	1.8	(8.3)
Accumulated other comprehensive income (loss), net of tax, end of period	(10.5)	(13.0)
Pension Benefit Plan Adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Accumulated other comprehensive income (loss), net of tax, beginning of period	(28.2)	(31.5)
Other comprehensive income (loss) before reclassifications	0.0	0.0
Amounts reclassified from accumulated other comprehensive loss to net earnings (loss)	0.0	0.0
Other comprehensive loss, net of tax	0.0	0.0
Accumulated other comprehensive income (loss), net of tax, end of period	$ (28.2)	$ (31.5)