Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Net earnings including noncontrolling interests	$ 234	$ 396
Other Comprehensive Income (Loss), before Tax
Foreign currency translation adjustment, before tax	(79)	211
Pension and other postretirement benefit liabilities adjustment, before tax	7	2
Unrealized gain (loss) on investments, before tax	(2)	(2)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax	12	6
Other Comprehensive Income (Loss), Tax
Foreign currency translation adjustment, tax effect	(10)	(3)
Pension and other postretirement benefit liabilities adjustment, tax effect	13	(3)
Unrealized gain (loss) on investments, tax effect	0	0
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax	(65)	(19)
Other Comprehensive Income (Loss), Net of Tax
Foreign currency translation adjustment, net of tax	(89)	208
Pension and other postretirement benefit liabilities adjustment, net of tax	20	(1)
Unrealized gain (loss) on investments, net of tax	(2)	(2)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax	(77)	(25)
Other comprehensive income (loss)	(136)	186
Comprehensive income (loss) including noncontrolling interests	98	582
Less: Comprehensive income (loss) attributable to noncontrolling interests	1	3
Comprehensive income (loss) attributable to controlling interests	$ 97	$ 579