Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Statement of Comprehensive Income [Abstract]
Net earnings	$ 137.7	$ 129.2	$ 329.1	$ 316.3
Other comprehensive income (loss):
Foreign currency translation adjustments	46.0	11.8	180.1	33.7
Translation adjustments on net investment hedge, net of income taxes of $(9.3), $(3.2), $(31.0) and $(8.8), respectively	(16.5)	(5.5)	(55.2)	(15.7)
Translation adjustments of long-term intercompany loans	3.3	(11.2)	5.6	(54.3)
Unrealized gain on investments, net of income taxes of $0.2, $0.2, $0.8 and $0.3, respectively	0.9	0.6	3.9	1.1
Defined benefit pension plans and retiree health care plan, net of income taxes of $0.1, $(1.0), $0.3 and $(1.3), respectively	0.4	(3.1)	1.1	(3.5)
Total other comprehensive income (loss)	34.1	(7.4)	135.5	(38.7)
Comprehensive income	$ 171.8	$ 121.8	$ 464.6	$ 277.6