Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Statement of Comprehensive Income [Abstract]
Net earnings including noncontrolling interests	$ 566	$ 275	$ 962	$ 615
Other Comprehensive Income (Loss), before Tax
Foreign currency translation adjustment, before tax	(402)	362	(191)	383
Pension and other postretirement benefit liabilities adjustment, before tax	13	7	15	19
Deferred gain (loss) on hedging activities, before tax	(64)	35	(89)	38
Unrealized gain (loss) on investments, before tax	(2)	1	(4)	(5)
Other Comprehensive Income (Loss), Tax
Foreign currency translation adjustment, tax effect	(19)	33	(22)	36
Pension and other postretirement benefit liabilities adjustment, tax effect	(1)	(2)	(4)	(8)
Deferred gain (loss) on hedging activities, tax effect	15	(2)	21	(5)
Unrealized gain (loss) on investments, tax effect	0	0	0	0
Other Comprehensive Income (Loss), Net of Tax
Foreign currency translation adjustment, net of tax	(421)	395	(213)	419
Pension and other postretirement benefit liabilities adjustment, net of tax	12	5	11	11
Deferred gain (loss) on hedging activities, net of tax	(49)	33	(68)	33
Unrealized gain (loss) on investments, net of tax	(2)	1	(4)	(5)
Other comprehensive income (loss)	(460)	434	(274)	458
Comprehensive income (loss) including noncontrolling interests	106	709	688	1,073
Less: Comprehensive income (loss) attributable to noncontrolling interests	0	0	3	1
Comprehensive income (loss) attributable to controlling interests	$ 106	$ 709	$ 685	$ 1,072