Condensed Consolidated Statements of Comprehensive Income (Parenthetical) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax Effect [Abstract]
Unrealized loss arising during period, tax	$ 36	$ 18	$ 51	$ 7
Reclassification adjustment for (gain)/loss included in net earnings, tax	4	(5)	3	(5)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Tax, Portion Attributable to Parent [Abstract]
Amortization of prior service cost included in net periodic pension cost, tax	(2)	(3)	(3)	(6)
Net actuarial loss arising during the period, tax	0	(15)	(16)	(24)
Amortization of actuarial losses included in net periodic pension cost, tax	(216)	(187)	(431)	(375)
Settlements and curtailments included in net income, tax	0	(1)	(5)	(3)
Pension and post retirement benefits related to our equity method investments, tax	$ 0	$ 2	$ (1)	$ 6