Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Statement of Comprehensive Income [Abstract]
Net earnings including noncontrolling interests	$ 253	$ 748	$ 1,129	$ 1,548
Other Comprehensive Income (Loss), before Tax
Foreign currency translation adjustment, before tax	(175)	(462)	(700)	(462)
Pension and other postretirement benefit liabilities adjustment, before tax	35	14	73	24
Deferred gain (loss) on hedging activities, before tax	(46)	59	(64)	32
Unrealized gain (loss) on investments, before tax	20	10	43	3
Other Comprehensive Income (Loss), Tax
Foreign currency translation adjustment, tax effect	3	7	29	8
Pension and other postretirement benefit liabilities adjustment, tax effect	(8)	(4)	(27)	(7)
Deferred gain (loss) on hedging activities, tax effect	13	(23)	25	(13)
Unrealized gain (loss) on investments, tax effect	1	0	(1)	3
Other Comprehensive Income (Loss), Net of Tax
Foreign currency translation adjustment, net of tax	(172)	(455)	(671)	(454)
Pension and other postretirement benefit liabilities adjustment, net of tax	27	10	46	17
Deferred gain (loss) on hedging activities, net of tax	(33)	36	(39)	19
Unrealized gain (loss) on investments, net of tax	21	10	42	6
Other comprehensive income (loss)	(157)	(399)	(622)	(412)
Comprehensive income (loss) including noncontrolling interests	96	349	507	1,136
Less: Comprehensive income (loss) attributable to noncontrolling interests	1	1	(3)	1
Comprehensive income (loss) attributable to controlling interests	$ 95	$ 348	$ 510	$ 1,135