Postretirement Benefits (Details) (USD $)	1 Months Ended	3 Months Ended
	Feb. 28, 2012	Mar. 31, 2012	Mar. 31, 2011
Weighted-average assumptions used to determine net cost:
Contributions to U.S. and non-U.S. pension plans		$ 174,000,000	$ 131,000,000
Expected full year contributions to U.S. and non-U.S. pension plans during the year		1,000,000,000
Amount of employer contribution required in current year		570,000,000
U.S. Pension Benefits
Components of net periodic benefit cost
Service cost		46,000,000	39,000,000
Interest cost		154,000,000	162,000,000
Expected return on plan assets		(203,000,000)	(199,000,000)
Amortization of:
Prior service cost (credit)		5,000,000	5,000,000
Net actuarial loss (gain)		124,000,000	113,000,000
Net periodic benefit cost, excluding curtailments, settlements and special termination benefits		126,000,000	120,000,000
Total cost included in operating profit		126,000,000	120,000,000
Weighted-average assumptions used to determine net cost:
Discount rate (as a percent)		4.30%	5.10%
Expected return on plan assets (as a percent)		8.00%	8.50%
Rate of compensation increase (as a percent)		4.50%	4.50%
Non-U.S. Pension Benefits
Defined Benefit Plan Disclosure
Other postretirement benefits, curtailment gain recognized and special termination benefit expense recognized	10,000,000	10,000,000
Components of net periodic benefit cost
Service cost		28,000,000	27,000,000
Interest cost		45,000,000	43,000,000
Expected return on plan assets		(54,000,000)	(50,000,000)
Amortization of:
Prior service cost (credit)			1,000,000
Net actuarial loss (gain)		24,000,000	18,000,000
Net periodic benefit cost, excluding curtailments, settlements and special termination benefits		43,000,000	39,000,000
Curtailments, settlements and special termination benefits	10,000,000	10,000,000
Total cost included in operating profit		53,000,000	39,000,000
Weighted-average assumptions used to determine net cost:
Discount rate (as a percent)		4.30%	4.60%
Expected return on plan assets (as a percent)		7.10%	7.10%
Rate of compensation increase (as a percent)		3.90%	4.20%
Other Postretirement Benefits
Defined Benefit Plan Disclosure
Loss of a third party receivable for other postretirement benefits	21,000,000
Other postretirement benefits, curtailment gain recognized and special termination benefit expense recognized	(37,000,000)	(40,000,000)
Components of net periodic benefit cost
Service cost		24,000,000	21,000,000
Interest cost		55,000,000	63,000,000
Expected return on plan assets		(16,000,000)	(18,000,000)
Amortization of:
Transition obligation (asset)		1,000,000	1,000,000
Prior service cost (credit)		(17,000,000)	(14,000,000)
Net actuarial loss (gain)		25,000,000	27,000,000
Net periodic benefit cost, excluding curtailments, settlements and special termination benefits		72,000,000	80,000,000
Curtailments, settlements and special termination benefits	(37,000,000)	(40,000,000)
Total cost included in operating profit		$ 32,000,000	$ 80,000,000
Weighted-average assumptions used to determine net cost:
Discount rate (as a percent)		4.30%	5.00%
Expected return on plan assets (as a percent)		8.00%	8.50%
Rate of compensation increase (as a percent)		4.40%	4.40%