Accumulated Other Comprehensive Loss (By Component) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Accumulated other comprehensive income (loss), net of tax, beginning of period			$ (152.2)	$ (127.3)
Other comprehensive income (loss) before reclassifications			(6.1)	(6.1)
Amounts reclassified from accumulated other comprehensive loss to net earnings (loss)			0.0	0.0
Other comprehensive loss, net of tax	$ (3.0)	$ (14.6)	(6.1)	(6.1)
Accumulated other comprehensive income (loss), net of tax, end of period	(158.3)	(133.4)	(158.3)	(133.4)
Translation Adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Accumulated other comprehensive income (loss), net of tax, beginning of period			(130.0)	(117.0)
Other comprehensive income (loss) before reclassifications			1.8	(10.0)
Amounts reclassified from accumulated other comprehensive loss to net earnings (loss)			0.0	0.0
Other comprehensive loss, net of tax			1.8	(10.0)
Accumulated other comprehensive income (loss), net of tax, end of period	(128.2)	(127.0)	(128.2)	(127.0)
Interest Rate Swap Adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Accumulated other comprehensive income (loss), net of tax, beginning of period			3.3	1.6
Other comprehensive income (loss) before reclassifications			(7.9)	3.9
Amounts reclassified from accumulated other comprehensive loss to net earnings (loss)			0.0	0.0
Other comprehensive loss, net of tax			(7.9)	3.9
Accumulated other comprehensive income (loss), net of tax, end of period	(4.6)	5.5	(4.6)	5.5
Pension Benefit Plan Adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Accumulated other comprehensive income (loss), net of tax, beginning of period			(25.5)	(11.9)
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	$ (25.5)	$ (11.9)	$ (25.5)	$ (11.9)