Pension Savings And Other Postretirement Benefit Plans (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended							3 Months Ended			9 Months Ended	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012 Foreign Pension Plans, Defined Benefit	Sep. 30, 2011 Foreign Pension Plans, Defined Benefit	Sep. 30, 2012 Foreign Pension Plans, Defined Benefit	Sep. 30, 2011 Foreign Pension Plans, Defined Benefit	Sep. 30, 2012 U.S.	Sep. 30, 2011 U.S.	Sep. 30, 2012 U.S.	Sep. 30, 2011 U.S.	Sep. 30, 2012 Other Postretirement Benefit Plans, Defined Benefit	Aug. 31, 2012 United States Postretirement Benefit Plans of US Entity, Defined Benefit	Dec. 31, 2011 United States Postretirement Benefit Plans of US Entity, Defined Benefit	Aug. 31, 2012 Foreign Postretirement Benefit Plans, Defined Benefit	Dec. 31, 2011 Foreign Postretirement Benefit Plans, Defined Benefit	Sep. 30, 2012 Annuity Purhcase to settle u.k. pension plan obligations Foreign Pension Plans, Defined Benefit	Aug. 31, 2012 U.S. Other Postretirement Benefit Plans, Change in Benefit Obligation Other Postretirement Benefit Plans, Defined Benefit	Aug. 31, 2012 Canadian Other Postretirement Benefit Plans, Change in Benefit Obligation Other Postretirement Benefit Plans, Defined Benefit	Sep. 30, 2012 Prior Service Cost Other Postretirement Benefit Plans, Defined Benefit	Dec. 31, 2011 Prior Service Cost Other Postretirement Benefit Plans, Defined Benefit
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost- benefits earned during the period					$ 8	$ 8	$ 23	$ 24	$ 10	$ 10	$ 30	$ 31
Interest cost on projected benefit obligation					36	37	106	113	65	71	196	212
Expected return on plan assets					(28)	(33)	(87)	(99)	(75)	(76)	(225)	(229)
Amortization of prior service cost					0	1	1	2	5	5	17	17
Amortization of net losses					11	10	34	29	45	33	134	100
Net periodic pension cost					27	23	77	69	50	43	152	131
Curtailments/settlements/termination benefits	0	4	0	15	11	0	11	0	0	4	0	15
Total defined benefit pension cost					38	23	88	69	50	47	152	146
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements										4		15						9
Pension Savings and Other Postretirement Benefit Plans (Textuals) [Abstract]
Expected Current Year Contributions To Funded Pension Plans, Minimum			550
Expected Current Year Contributions To Funded Pension Plans, Maximum			600
Contributions to pension plans					28		109		225		354
Contributions to defined savings plans	22	24	72	75
Postretirement benefit cost (credit)	0	2	3	7
Defined Benefit Plan, Benefit Obligation																			56	18
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate														3.00%	4.00%	4.00%	4.25%
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year																					40	37
Defined Benefit Plan Expected Future Benefit Payments Years One through Ten, Other Postretirement Plans Net of Medicare Part D Reimbursement, Minimum													5
Defined Benefit Plan Expected Benefit Payments Years One through Ten, Other Postretirement Plans, Net of Medicare Part D Reimbursement, Maximum													$ 10