Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net earnings	$ 1.7	$ 53.5
Other comprehensive loss:
Foreign currency translation adjustments	(84.9)	(30.6)
Translation adjustments on derivative instruments, net of income taxes of $5.4 and $5.1, respectively	10.7	17.4
Translation adjustments of long-term intercompany loans	1.5	11.0
Defined benefit pension plans and retiree health care plan, net of income taxes of $7.7 and $0.1, respectively	1.3	0.2
Pension settlement related to a U.S. plan, net of income taxes of $(3.9)	6.6
Total other comprehensive loss	(64.8)	(2.0)
Comprehensive (loss) income	$ (63.1)	$ 51.5