Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Net earnings including noncontrolling interests	$ 1,379	$ 1,815	$ 1,602
Other Comprehensive Income (Loss), Before tax
Foreign currency translation adjustment, before tax	(176)	(581)	692
Pension and other postretirement benefit liabilities adjustment, before tax	(98)	156	298
Deferred gain (loss) on hedging avtivities, before tax	(91)	57	12
Unrealized gain (loss) on investments, before tax	13	(4)	(1)
Other Comprehensive Income (Loss), Tax
Foreign currency translation adjustment, tax effect	(12)	(28)	59
Pension and other postretirement benefit liabilities adjustment, tax effect	50	(55)	(98)
Deferred gain (loss) on hedging activities, tax effect	18	(13)	(1)
Unrealized gain (loss) on investments, tax effect	(1)	(1)	2
Other Comprehensive Income (Loss), Net of Tax
Foreign currency translation adjustment, net of tax	(188)	(609)	751
Pension and other postretirement benefit liabilities adjustment, net of tax	(48)	101	200
Deferred gain (loss) on hedging activities, net of tax	(73)	44	11
Unrealized gain (loss) on investments, net of tax	12	(5)	1
Other comprehensive income (loss)	(297)	(469)	963
Comprehensive income (loss)	1,082	1,346	2,565
Less: Comprehensive income (loss) attributable to noncontrolling interests	2	5	9
Comprehensive income (loss) attributable to controlling interests	$ 1,080	$ 1,341	$ 2,556