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Commitments And Contingencies Commitment and Contingencies (Details)
Share data in Millions, unless otherwise specified |
3 Months Ended | 12 Months Ended | 12 Months Ended | 12 Months Ended | 12 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Mar. 31, 2012
USD ($)
|
Mar. 31, 2012
EUR (€)
|
Mar. 31, 2012
KRW
|
Dec. 31, 2011
USD ($)
|
Mar. 31, 2012
CAD
|
Dec. 31, 2011
Operating Leases [Member]
USD ($)
|
Mar. 31, 2012
Operating Leases [Member]
USD ($)
|
Dec. 31, 2011
Ally Financial Commercial Loans [Member]
USD ($)
|
Mar. 31, 2012
Ally Financial Commercial Loans [Member]
USD ($)
|
Mar. 31, 2012
Third party comercial loans and other obligations [Member]
USD ($)
|
Dec. 31, 2011
Third party comercial loans and other obligations [Member]
USD ($)
|
Dec. 31, 2011
Guarantees of Product Related Claims [Member]
USD ($)
|
Mar. 31, 2012
Guarantees of Product Related Claims [Member]
USD ($)
|
|
| Guarantor Obligations [line items] | |||||||||||||
| Liability Recorded | $ 0 | $ 0 | $ 0 | $ 0 | $ 8,000,000 | $ 7,000,000 | $ 53,000,000 | $ 54,000,000 | |||||
| Maximum Liability | 26,000,000 | 9,000,000 | 24,000,000 | 28,000,000 | 279,000,000 | 210,000,000 | 838,000,000 | 773,000,000 | |||||
| Guarantees on Operating Leases, Termination Years | 2016 to 2035 | ||||||||||||
| Guarantees on Commercial Loans, Termination Years | 2012 through 2029 or are ongoing | ||||||||||||
| Guarantees on Supplier Commitments and Other Obligations, Termination Years | 2012 through 2016 or are ongoing | ||||||||||||
| Guarantees on Other Product Related Claims, Termination Years | 2020 to 2026 | ||||||||||||
| Other contingencies [Abstract] | |||||||||||||
| Product Liability | 547,000,000 | 514,000,000 | |||||||||||
| Environmental Liability | 171,000,000 | 169,000,000 | |||||||||||
| Other Litigation Liability | 1,274,000,000 | 1,196,000,000 | |||||||||||
| Environmental Liability Recorded in Accrued Liabilities | 32,000,000 | 34,000,000 | |||||||||||
| Environmental Liabilities Footnote [Abstract] | |||||||||||||
| Environmental Remediation Losses, Low Estimate | 140,000,000 | ||||||||||||
| Environmental Remediation Losses, High Estimate | 330,000,000 | ||||||||||||
| Enrironmental Remediation Years of Cost to Incur, Min | 5 | 5 | 5 | 5 years | |||||||||
| Enrironmental Remediation Years of Cost to Incur, Max | 30 | 30 | 30 | 30 years | |||||||||
| Other Litigation Related Liability Footnote [Abstract] | |||||||||||||
| Indirect Tax Escrow Deposit, Low Range | 556,000,000 | ||||||||||||
| Indirect Tax Escrow Deposit, High Range | 772,000,000 | ||||||||||||
| Korean Labor Litigation Liability - Korean Won | 166,000,000,000 | ||||||||||||
| Korean Labor Litigation Liability - US Dollar | 146,000,000 | ||||||||||||
| Estimated Litigation Settlement Loss - Korean Won | 607,000,000,000 | ||||||||||||
| Estimated Litigation Settlement Loss - US Dollar | 533,000,000 | ||||||||||||
| Canadian Dealers Litigation Claims - CAD | 750,000,000 | ||||||||||||
| Contribution Obligation for UAW Law Suit | 450,000,000 | ||||||||||||
| Estimated Litigation Loss - UAW Law Suit | 450,000,000 | ||||||||||||
| Contingently Issuable Shares Footnote | |||||||||||||
| General Unsecured Claims - Threshold | 35,000,000,000 | ||||||||||||
| Estimated General Unsecured Claims Maximum | 42,000,000,000 | ||||||||||||
| Maximum Adjustment Shares | 30 | 30 | 30 | ||||||||||
| Estimated General Unsecured Claims, Low Range | 32,500,000,000 | ||||||||||||
| Estimated General Unsecured Claims, Upper Range | 36,000,000,000 | ||||||||||||
| Planned Spending Guarantee Footnote [Abstract] | |||||||||||||
| Planned Spending Guarantee - Euro | 265,000,000 | ||||||||||||
| Assets Pledged as Collateral | $ 215,000,000 | $ 209,000,000 | |||||||||||