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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 3) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | ||
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Dec. 31, 2014
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Dec. 31, 2013
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Dec. 31, 2012
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| Goodwill. | |||
| Goodwill | $ 479us-gaap_Goodwill | $ 461us-gaap_Goodwill | $ 445us-gaap_Goodwill |
| Percentage of total goodwill, emissions solutions and filtration | 82.00%cmi_PercentageOfGoodwillAccountedBySingleReportingUnit | ||
| Research and Development | |||
| Research and development expenses, net of contract reimbursements | 737cmi_ResearchAndDevelopmentExcludeEngineeringExpense | 700cmi_ResearchAndDevelopmentExcludeEngineeringExpense | 721cmi_ResearchAndDevelopmentExcludeEngineeringExpense |
| Research and Development Arrangement, Contract to Perform for Others, Compensation Earned | $ 121us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersCompensationEarned | $ 76us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersCompensationEarned | $ 86us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersCompensationEarned |
| X | ||||||||||
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- Definition
This element represents the percentage of total goodwill as of the balance sheet date. No definition available.
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| X | ||||||||||
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- Definition
Research and development costs, excluding engineering, incurred for product improvement, innovation and cost reductions. No definition available.
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| X | ||||||||||
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- Definition
Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
The amount of compensation earned (contract income) under a research and development arrangement accounted for as a contract to perform research and development for others. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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