Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Statement of Comprehensive Income [Abstract]
Net earnings/(loss)	$ (234)	$ 1,110	$ 985	$ 2,446
Currency translation adjustments	(16)	44	7	(44)
Unrealized (loss)/gain on certain investments, net of tax of $1, ($3), $0, and ($2)	1	3	(1)	4
Unrealized (loss)/gain on derivative instruments [Abstract]
Unrealized gain/(loss) arising during period, net of tax of ($23), $37, $9, and ($14)	(17)	25	41	(66)
Reclassification adjustment for losses included in net earnings, net of tax of ($24), ($16), ($12), and ($10)	20	16	43	28
Total unrealized gain/(loss) on derivative instruments, net of tax	3	41	84	(38)
Defined benefit pension plans & other postretirement benefits [Abstract]
Amortization of prior service (benefit)/cost included in net periodic pension cost, net of tax of $15, ($11), $8, and ($6)	(13)	9	(27)	19
Net actuarial (loss)/gain arising during the period, net of tax of $215, ($17), $34, and ($17)	(59)	31	(387)	31
Amortization of actuarial losses included in net periodic pension cost, net of tax of ($145), ($282), ($73) and ($145)	130	264	261	508
Settlements and curtailments included in net income/(loss), net of tax of ($7), ($2), ($1), and ($2)	3	3	14	3
Pension and postretirement cost/(benefit) related to our equity method investments, net of tax of ($1),$0, $3 and $0	(6)		2
Total defined benefit pension plans and other postretirement benefits, net of tax	55	307	(137)	561
Other comprehensive (loss)/income, net of tax	43	395	(47)	483
Comprehensive loss related to noncontrolling interests	(1)			(1)
Comprehensive income/(loss), net of tax	$ (192)	$ 1,505	$ 938	$ 2,928