Accumulated Other Comprehensive Loss Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Foreign currency translation adjustments
Beginning Balance	$ (293.8)	$ (530.3)
Comprehensive income (loss) before reclassifications	61.7	49.0
Income taxes associated with comprehensive income (loss) before reclassifications	3.3	0.0
Reclassification from accumulated other comprehensive income (loss)	0.0	0.0
Income taxes reclassified into net earnings	0.0	0.0
Ending Balance	(228.8)	(481.3)
Hedge instruments
Beginning Balance	(1.3)	5.0
Comprehensive income (loss) before reclassifications	(5.5)	0.5
Income taxes associated with comprehensive income (loss) before reclassifications	1.3	(0.2)
Reclassification from accumulated other comprehensive income (loss)	1.2	(2.1)
Income taxes reclassified into net earnings	(0.3)	0.6
Ending Balance	(4.6)	3.8
Defined benefit postretirement plans
Beginning Balance	(197.6)	(198.1)
Comprehensive income (loss) before reclassifications	(4.3)	(2.3)
Income taxes associated with comprehensive income (loss) before reclassifications	1.1	1.0
Reclassification from accumulated other comprehensive income (loss)	1.9	2.1
Income taxes reclassified into net earnings	(0.7)	(0.7)
Ending Balance	(199.6)	(198.0)
Other
Beginning Balance	2.7	1.3
Comprehensive income (loss) before reclassifications	0.0	0.0
Income taxes associated with comprehensive income (loss) before reclassifications	0.0	0.0
Reclassification from accumulated other comprehensive income (loss)	0.0	0.0
Income taxes reclassified into net earnings	0.0	0.0
Ending Balance	2.7	1.3
Total
Beginning Balance	(490.0)	(722.1)
Comprehensive income (loss) before reclassifications	51.9	47.2
Income taxes associated with comprehensive income (loss) before reclassifications	5.7	0.8
Reclassification from accumulated other comprehensive income (loss)	3.1	0.0
Income taxes reclassified into net earnings	(1.0)	(0.1)
Ending Balance	$ (490.0)	$ (722.1)	$ (430.3)	$ (674.2)