Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Comprehensive Income [Abstract]
Net earnings including noncontrolling interests	$ 1,815	$ 1,602	$ 1,288
Other Comprehensive Income (Loss), Before tax
Foreign currency translation adjustment, before tax	(581)	692	(467)
Pension and other postretirement benefit liabilities adjustment, before tax	156	298	(1)
Deferred gain (loss) on hedging avtivities, before tax	57	12	33
Unrealized gain (loss) on investments, before tax	(4)	(1)	3
Other Comprehensive Income (Loss), Tax
Foreign currency translation adjustment, tax effect	(28)	59	(10)
Pension and other postretirement benefit liabilities adjustment, tax effect	(55)	(98)	3
Deferred gain (loss) on hedging activities, tax effect	(13)	(1)	(12)
Unrealized gain (loss) on investments, tax effect	(1)	2	(2)
Other Comprehensive Income (Loss), Net of Tax
Foreign currency translation adjustment, net of tax	(609)	751	(477)
Pension and other postretirement benefit liabilities adjustment, net of tax	101	200	2
Deferred gain (loss) on hedging activities, net of tax	44	11	21
Unrealized gain (loss) on investments, net of tax	(5)	1	1
Other comprehensive income (loss)	(469)	963	(453)
Comprehensive income (loss)	1,346	2,565	835
Less: Comprehensive income (loss) attributable to noncontrolling interests	5	9	8
Comprehensive income (loss) attributable to controlling interests	$ 1,341	$ 2,556	$ 827