Annual report pursuant to Section 13 and 15(d)

COMMITMENTS AND CONTINGENCIES (Details)

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COMMITMENTS AND CONTINGENCIES (Details) (USD $)
In Millions, unless otherwise specified
1 Months Ended 12 Months Ended 12 Months Ended
Oct. 31, 2011
Jun. 30, 2008
item
Dec. 31, 2010
Dec. 31, 2012
U.S. Distributor Commitments
Dec. 31, 2012
Other Guarantees and Commitments
Dec. 31, 2012
Cummins Olayan Energy Limited Guarantee
Dec. 31, 2012
Xi'an Cummins Engine Company Limited debt guarantee
Dec. 31, 2012
Residual value guarantees
Dec. 31, 2012
Other debt guarantees
Dec. 31, 2012
Engine parts supplier
Dec. 31, 2012
Performance bonds and other performance-related guarantees
Dec. 31, 2011
Performance bonds and other performance-related guarantees
Dec. 31, 2012
Joint Venture Commitments
COMMITMENTS AND CONTINGENCIES                          
Revenue tax credit recognized related to Brazil tax settlement, pre-tax     $ 32                    
Revenue tax credit recognized related to Brazil tax settlement, net of tax     21                    
Flood water damage, number of sites   4                      
Recoveries from insurance carriers on flood damage 40                        
Gain on insurance recovery, pre-tax 38                        
Gain on insurance recovery, after-tax 24                        
Commitments and contingencies:                          
Licensing agreement term       3 years                  
Number of days in which distributors can terminate agreements without cause       60 days                  
Number of days in which distributors can terminate agreements with cause       30 days                  
Guarantee obligations, maximum potential loss         16 11 2 1 2        
Long-term purchase commitment, penalty exposure         94         90      
Annual commitment under purchase contract with emission solutions business supplier from 2012 to 2018         73                
Guarantee obligations, current carrying value         2           70 81  
Guarantee obligations commitment                         86
Joint venture estimated commitment to be funded next year                         $ 75