Postretirement Benefits (Details) (USD $)	1 Months Ended	3 Months Ended		9 Months Ended		1 Months Ended	3 Months Ended		9 Months Ended		1 Months Ended	3 Months Ended		9 Months Ended		1 Months Ended	3 Months Ended		9 Months Ended
	Feb. 29, 2012	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Aug. 31, 2012 U.S. Pension Benefits	Sep. 30, 2012 U.S. Pension Benefits	Sep. 30, 2011 U.S. Pension Benefits	Sep. 30, 2012 U.S. Pension Benefits	Sep. 30, 2011 U.S. Pension Benefits	Feb. 29, 2012 Non-U.S. Pension Benefits	Sep. 30, 2012 Non-U.S. Pension Benefits	Sep. 30, 2011 Non-U.S. Pension Benefits	Sep. 30, 2012 Non-U.S. Pension Benefits	Sep. 30, 2011 Non-U.S. Pension Benefits	Feb. 29, 2012 Other Postretirement Benefits	Sep. 30, 2012 Other Postretirement Benefits	Sep. 30, 2011 Other Postretirement Benefits	Sep. 30, 2012 Other Postretirement Benefits	Sep. 30, 2011 Other Postretirement Benefits
Defined Benefit Plan Disclosure
Defined Benefit Plan Loss on Third Party Receivable																$ 21,000,000
Components of net periodic benefit cost
Service cost							46,000,000	41,000,000	138,000,000	118,000,000		26,000,000	28,000,000	82,000,000	83,000,000		23,000,000	21,000,000	69,000,000	62,000,000
Interest cost							152,000,000	164,000,000	460,000,000	488,000,000		44,000,000	45,000,000	135,000,000	132,000,000		55,000,000	64,000,000	166,000,000	190,000,000
Expected return on plan assets							(204,000,000)	(200,000,000)	(610,000,000)	(598,000,000)		(53,000,000)	(50,000,000)	(160,000,000)	(150,000,000)		(15,000,000)	(18,000,000)	(47,000,000)	(53,000,000)
Amortization of:
Transition obligation / (asset)							0	0	0	0		0	0	0	0		1,000,000	1,000,000	2,000,000	2,000,000
Prior service cost / (credit)							5,000,000	5,000,000	15,000,000	15,000,000		1,000,000	1,000,000	1,000,000	2,000,000		(18,000,000)	(14,000,000)	(51,000,000)	(41,000,000)
Net actuarial loss / (gain)							126,000,000	112,000,000	374,000,000	338,000,000		24,000,000	18,000,000	72,000,000	54,000,000		25,000,000	27,000,000	75,000,000	81,000,000
Net periodic benefit cost, excluding curtailments, settlements and special termination benefits							125,000,000	122,000,000	377,000,000	361,000,000		42,000,000	42,000,000	130,000,000	121,000,000		71,000,000	81,000,000	214,000,000	241,000,000
Curtailments, settlements and special termination benefits						7,000,000	7,000,000	0	7,000,000	0	10,000,000	6,000,000	0	28,000,000	9,000,000	(37,000,000)	0	0	(40,000,000)	0
Defined Benefit Plan, net gain due to facility closure	6,000,000
Defined Benefit Plan, Effect of Plan Amendment on Accumulated Benefit Obligation						243,000,000
Defined Benefit Plan Effect Of Plan Remeasurement On Accumulated Other Comprehensive Income After Tax						153,000,000
Total cost included in operating profit							132,000,000	122,000,000	384,000,000	361,000,000		48,000,000	42,000,000	158,000,000	130,000,000		71,000,000	81,000,000	174,000,000	241,000,000
Weighted-average assumptions used to determine net cost:
Discount rate (as a percent)									4.30%	5.10%				4.30%	4.60%				4.30%	5.00%
Expected return on plan assets (as a percent)									8.00%	8.50%				7.10%	7.10%				8.00%	8.50%
Rate of compensation increase (as a percent)									4.50%	4.50%				3.90%	4.20%				4.40%	4.40%
Pension Contributions [Abstract]
Contributions to pension plans		195,000,000	105,000,000	488,000,000	340,000,000
Expected full year contributions pension plans during the year		1,000,000,000		1,000,000,000
Amount of employer contribution required in current year		$ 625,000,000		$ 625,000,000