Consolidated Statements of Comprehensive Income (Parenthetical) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Statement of Comprehensive Income [Abstract]
Unrealized loss on certain investments, tax		$ 0	$ 1
Unrealized (loss)/gain on derivative instruments:
Unrealized gain/(loss) arising during period, tax	42	(13)	7
Reclassification adjustment for loss included in net earnings, tax	9	3	9
Defined benefit pension plans & other postretirement benefits:
Prior service cost arising during the period, tax	41	9	(195)
Amortization of prior service cost included in net periodic pension cost, tax	(6)	(10)	(54)
Net actuarial loss arising during the period, tax	(3,437)	1,382	2,297
Amortization of actuarial losses included in net periodic pension cost, tax	(849)	(752)	(523)
Settlements and curtailments included in net income, tax	(33)	(9)	(25)
Pension and post retirement benefits related to our equity method investments, tax	$ (13)	$ (74)	$ 38