Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement of Comprehensive Income [Abstract]
Net earnings including noncontrolling interests	$ 396	$ 340
Other Comprehensive Income (Loss), before Tax
Foreign currency translation adjustment, before tax	211	21
Pension and other postretirement benefit liabilities adjustment, before tax	2	12
Deferred gain (loss) on hedging activities, before tax	(25)	3
Unrealized gain (loss) on investments, before tax	(2)	(6)
Other Comprehensive Income (Loss), Tax
Foreign currency translation adjustment, tax effect	(3)	3
Pension and other postretirement benefit liabilities adjustment, tax effect	(3)	(6)
Deferred gain (loss) on hedging activities, tax effect	6	(3)
Unrealized gain (loss) on investments, tax effect	0	0
Other Comprehensive Income (Loss), Net of Tax
Foreign currency translation adjustment, net of tax	208	24
Pension and other postretirement benefit liabilities adjustment, net of tax	(1)	6
Deferred gain (loss) on hedging activities, net of tax	(19)	0
Unrealized gain (loss) on investments, net of tax	(2)	(6)
Other comprehensive income (loss)	186	24
Comprehensive income (loss) including noncontrolling interests	582	364
Less: Comprehensive income (loss) attributable to noncontrolling interests	3	1
Comprehensive income (loss) attributable to controlling interests	$ 579	$ 363