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	$ 1,767.9	$ 944.4	$ 971.8
Other comprehensive income, net of tax:
Foreign currency translation adjustments	30.5	(57.1)	138.5
Total other comprehensive income/(loss), net of tax	30.5	(57.1)	138.5
Comprehensive income	$ 1,798.4	$ 887.3	$ 1,110.3