Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement of Comprehensive Income [Abstract]
Net earnings including noncontrolling interests	$ 408	$ 536	$ 880	$ 1,498
Other Comprehensive Income (Loss), before Tax
Foreign currency translation adjustment, before tax	(251)	(178)	(236)	(369)
Pension and other postretirement benefit liabilities adjustment, before tax	7	8	10	23
Deferred gain (loss) on hedging activities, before tax	(2)	77	(65)	(12)
Unrealized gain (loss) on investments, before tax	7	(7)	12	(11)
Other Comprehensive Income (Loss), Tax
Foreign currency translation adjustment, tax effect	(35)	(1)	(38)	(23)
Pension and other postretirement benefit liabilities adjustment, tax effect	0	(3)	15	(7)
Deferred gain (loss) on hedging activities, tax effect	8	(17)	13	4
Unrealized gain (loss) on investments, tax effect	0	0	(1)	0
Other Comprehensive Income (Loss), Net of Tax
Foreign currency translation adjustment, net of tax	(286)	(179)	(274)	(392)
Pension and other postretirement benefit liabilities adjustment, net of tax	7	5	25	16
Deferred gain (loss) on hedging activities, net of tax	6	60	(52)	(8)
Unrealized gain (loss) on investments, net of tax	7	(7)	11	(11)
Other comprehensive income (loss)	(266)	(121)	(290)	(395)
Comprehensive income (loss) including noncontrolling interests	142	415	590	1,103
Less: Comprehensive income (loss) attributable to noncontrolling interests	0	0	4	3
Comprehensive income (loss) attributable to controlling interests	$ 142	$ 415	$ 586	$ 1,100