Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Statement of Comprehensive Income [Abstract]
Net earnings including noncontrolling interests	$ 195	$ 344	$ 810	$ 862
Other Comprehensive Income (Loss), before Tax
Foreign currency translation adjustment, before tax	245	(41)	628	(57)
Pension and other postretirement benefit liabilities adjustment, before tax	174	11	193	27
Deferred gain (loss) on hedging activities, before tax	(26)	1	12	(10)
Unrealized gain (loss) on investments, before tax	6	(28)	1	(16)
Other Comprehensive Income (Loss), Tax
Foreign currency translation adjustment, tax effect	(40)	5	(4)	18
Pension and other postretirement benefit liabilities adjustment, tax effect	(66)	(4)	(74)	(7)
Deferred gain (loss) on hedging activities, tax effect	6	3	1	3
Unrealized gain (loss) on investments, tax effect	0	1	0	(2)
Other Comprehensive Income (Loss), Net of Tax
Foreign currency translation adjustment, net of tax	205	(36)	624	(39)
Pension and other postretirement benefit liabilities adjustment, net of tax	108	7	119	20
Deferred gain (loss) on hedging activities, net of tax	(20)	4	13	(7)
Unrealized gain (loss) on investments, net of tax	6	(27)	1	(18)
Other comprehensive income (loss)	299	(52)	757	(44)
Comprehensive income (loss) including noncontrolling interests	494	292	1,567	818
Less: Comprehensive income (loss) attributable to noncontrolling interests	4	3	5	7
Comprehensive income (loss) attributable to controlling interests	$ 490	$ 289	$ 1,562	$ 811