Pension, Other Postretirement Benefits and Savings Plans (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Pension Savings and Other Postretirement Benefit Plans (Textuals) [Abstract]
Contributions to defined savings plans	$ 98	$ 93	$ 84
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Curtailments/settlements	15	0	0
Current liabilities	(5,929)	(5,307)
DefinedBenefitPlanEstimatedFutureEmployerContributionsInNextFiscalYearMinimum	550
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year Maximum	600
Purchase Of Annuities To Settle Canadian Pension Plan Obligations [Member]
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Curtailments/settlements		15
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member]
Pension Savings and Other Postretirement Benefit Plans (Textuals) [Abstract]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	4.62%	5.45%	6.50%
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Total benefits cost (credit)	(12)	(1)	(10)
Foreign Postretirement Benefit Plans, Defined Benefit [Member]
Pension Savings and Other Postretirement Benefit Plans (Textuals) [Abstract]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	6.52%	6.79%	7.71%
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Total benefits cost (credit)	21	18	14
United States Pension Plans of US Entity, Defined Benefit [Member]
Pension Savings and Other Postretirement Benefit Plans (Textuals) [Abstract]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	5.20%	5.75%	6.50%
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	41	39	34
Interest cost	283	296	314
Expected return on plan assets	(306)	(280)	(235)
Amortization of prior service cost (credit)	23	31	33
Amortization of net losses	134	133	154
Net periodic cost	175	219	300
Curtailments/settlements	15	33	0
Termination benefits	0	43	0
Total benefits cost (credit)	190	295	300
Prior service cost from plan amendments	0	0	21
Increase (decrease) in net actuarial losses	735	143	(85)
Amortization of prior service (cost) credit in net periodic cost	(23)	(31)	(33)
Amortization of net losses in net periodc cost	(134)	(133)	(154)
Immediate recognition of prior service cost and unrecognized gains and losses due to curtailments, settlements and divestitures	(15)	(40)	0
Total recognized in other comprehensive (income) loss before tax and minority	563	(61)	(251)
Total recognized in total benefits cost and other comprehensive (income) loss before tax and minority	753	234	49
Noncurrent assets	0	0
Current liabilities	(10)	(35)
Noncurrent liabilities	(2,442)	(1,892)
Net amount recognized	(2,452)	(1,927)
Foreign Pension Plans, Defined Benefit [Member]
Pension Savings and Other Postretirement Benefit Plans (Textuals) [Abstract]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	5.54%	5.68%	6.31%
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	32	25	26
Interest cost	150	145	142
Expected return on plan assets	(131)	(126)	(115)
Amortization of prior service cost (credit)	2	2	2
Amortization of net losses	38	35	32
Net periodic cost	91	81	87
Curtailments/settlements	1	15	17
Termination benefits	1	0	1
Total benefits cost (credit)	93	96	105
Prior service cost from plan amendments	0	1	2
Increase (decrease) in net actuarial losses	45	(12)	367
Amortization of prior service (cost) credit in net periodic cost	(2)	(2)	(1)
Amortization of net losses in net periodc cost	(38)	(35)	(30)
Immediate recognition of prior service cost and unrecognized gains and losses due to curtailments, settlements and divestitures	(4)	(16)	(55)
Total recognized in other comprehensive (income) loss before tax and minority	1	(64)	283
Total recognized in total benefits cost and other comprehensive (income) loss before tax and minority	94	32	388
Noncurrent assets	33	35
Current liabilities	(21)	(20)
Noncurrent liabilities	(657)	(637)
Net amount recognized	(645)	(622)
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	6	5	6
Interest cost	30	33	32
Expected return on plan assets	0	(1)	(1)
Amortization of prior service cost (credit)	(37)	(37)	(38)
Amortization of net losses	10	9	5
Net periodic cost	9	9	4
Curtailments/settlements	0	8	0
Termination benefits	0	0	0
Total benefits cost (credit)	9	17	4
Prior service cost from plan amendments	0	0	1
Increase (decrease) in net actuarial losses	15	59	35
Amortization of prior service (cost) credit in net periodic cost	37	37	38
Amortization of net losses in net periodc cost	(10)	(9)	(5)
Immediate recognition of prior service cost and unrecognized gains and losses due to curtailments, settlements and divestitures	0	(8)	0
Total recognized in other comprehensive (income) loss before tax and minority	42	79	69
Total recognized in total benefits cost and other comprehensive (income) loss before tax and minority	51	96	73
Noncurrent assets	0	0
Current liabilities	(52)	(57)
Noncurrent liabilities	(524)	(540)
Net amount recognized	(576)	(597)
Close Of Tire Manufacturing Facility [Member]
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Curtailments/settlements		76
Participant Data For Prior Periods [Member] | United States Pension Plans of US Entity, Defined Benefit [Member]
Pension Savings and Other Postretirement Benefit Plans (Textuals) [Abstract]
Settlements		7
Change in Benefit Obligation [Member] | United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	41	(39)
Interest cost	(283)	(296)
Change in Benefit Obligation [Member] | Foreign Pension Plans, Defined Benefit [Member]
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	(32)	(25)
Interest cost	(150)	(145)
Change in Benefit Obligation [Member] | Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	(6)	(5)
Interest cost	(30)	(33)
Prior Service Cost [Member] | United States Pension Plans of US Entity, Defined Benefit [Member]
Pension Savings and Other Postretirement Benefit Plans (Textuals) [Abstract]
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Loss in Next Fiscal Year	23
Prior Service Cost [Member] | Foreign Pension Plans, Defined Benefit [Member]
Pension Savings and Other Postretirement Benefit Plans (Textuals) [Abstract]
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Loss in Next Fiscal Year	1
Prior Service Cost [Member] | Other Postretirement Benefit Plans, Defined Benefit [Member]
Pension Savings and Other Postretirement Benefit Plans (Textuals) [Abstract]
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Loss in Next Fiscal Year	(37)
Net Actuarial Loss [Member] | United States Pension Plans of US Entity, Defined Benefit [Member]
Pension Savings and Other Postretirement Benefit Plans (Textuals) [Abstract]
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Loss in Next Fiscal Year	183
Net Actuarial Loss [Member] | Foreign Pension Plans, Defined Benefit [Member]
Pension Savings and Other Postretirement Benefit Plans (Textuals) [Abstract]
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Loss in Next Fiscal Year	44
Net Actuarial Loss [Member] | Other Postretirement Benefit Plans, Defined Benefit [Member]
Pension Savings and Other Postretirement Benefit Plans (Textuals) [Abstract]
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Loss in Next Fiscal Year	12
Plans Not Fully Funded [Member] | United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets, Aggregate Projected Benefit Obligation	5,975	5,641
Plans Not Fully Funded [Member] | Foreign Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets, Aggregate Projected Benefit Obligation	$ 2,572	$ 2,191