Consolidated Statements of Comprehensive (Loss) Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net earnings	$ 62.0	$ 1.7
Other comprehensive income (loss):
Foreign currency translation adjustments	(96.5)	(84.9)
Translation adjustments on derivative instruments, net of income taxes of $14.4 and $5.4, respectively	49.6	10.7
Translation adjustments of long-term intercompany loans	5.6	1.5
Defined benefit pension plans and retiree health care plan, net of income taxes of $0.3 and $7.7, respectively	0.8	1.3
Pension settlement related to a U.S. plan, net of income taxes of $(3.9) for 2020		6.6
Total other comprehensive loss	(40.5)	(64.8)
Comprehensive income (loss)	$ 21.5	$ (63.1)