Consolidated Statements Of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement of Comprehensive Income [Abstract]
Net earnings	$ 2,492.1	$ 2,553.7	$ 3,357.4
Other comprehensive income (loss), net of income taxes:
Foreign currency translation adjustments	976.1	(517.3)	(975.6)
Pension and postretirement plan benefit adjustments	71.0	(58.2)	80.5
Unrealized (loss) gain on available-for-sale securities	(19.6)	(114.8)	17.6
Total other comprehensive income (loss), net of income taxes	1,027.5	(690.3)	(877.5)
Comprehensive income	$ 3,519.6	$ 1,863.4	$ 2,479.9