Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Net earnings	$ 738.9	$ 2,913.8	$ 1,044.5
Other comprehensive income (loss), net of income taxes:
Foreign currency translation adjustments	50.5	(127.3)	136.6
Pension adjustments	(20.2)	3.6	1.6
Total other comprehensive income (loss), net of income taxes	30.3	(123.7)	138.2
Comprehensive income	$ 769.2	$ 2,790.1	$ 1,182.7