Consolidated Statements Of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Comprehensive Income [Abstract]
Net earnings	$ 2,650.9	$ 2,492.1	$ 2,553.7
Other comprehensive income (loss), net of income taxes:
Foreign currency translation adjustments	(632.2)	976.1	(517.3)
Pension and postretirement plan benefit adjustments	(12.7)	71.0	(58.2)
Unrealized loss on available-for-sale securities	(0.8)	(19.6)	(114.8)
Total other comprehensive income (loss), net of income taxes	(645.7)	1,027.5	(690.3)
Comprehensive income	$ 2,005.2	$ 3,519.6	$ 1,863.4