CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Comprehensive Income [Abstract]
Net earnings	$ 556.7	$ 545.4	$ 443.7
Other comprehensive (loss) income:
Foreign currency translation	(135.5)	201.4	(79.9)
Translation adjustments on net investment hedge, net of income taxes of $10.2, $(34.3) and $8.4, respectively	35.2	(64.7)	14.8
Translation adjustments on long-term intercompany loans	(8.4)	4.9	(58.2)
Unrealized (loss) gain on investments, net of income taxes of $0.0, $(0.8) and $0.4, respectively	0.0	(3.3)	1.6
Defined benefit pension plans and retiree health care plan, net of income taxes of $4.6, $(0.1) and $(5.8), respectively	12.4	(0.4)	(18.4)
Total other comprehensive (loss) income	(96.3)	137.9	(140.1)
Comprehensive income	$ 460.4	$ 683.3	$ 303.6