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 1 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended 12 Months Ended
Oct. 31, 2011
Jun. 30, 2008
site
Dec. 31, 2010
Dec. 31, 2011
U.S. Distributor Commitments
D
Y
Dec. 31, 2011
Other Guarantees and Commitments
Dec. 31, 2011
Engine parts supplier
Jul. 31, 2008
Manufacturing - Beijing Foton Cummins Engine Co., Ltd.
Dec. 31, 2011
Manufacturing - Beijing Foton Cummins Engine Co., Ltd.
Feb. 28, 2010
Cummins Olayan Energy Limited Guarantee
Y
Dec. 31, 2011
Cummins Olayan Energy Limited Guarantee
Dec. 31, 2011
Performance bonds and other performance-related guarantees
Dec. 31, 2010
Performance bonds and other performance-related guarantees
Dec. 31, 2011
Joint Venture Commitments
COMMITMENTS AND CONTINGENCIES                          
Gain on insurance recovery, pre-tax $ 38                        
Gain on insurance recovery, after-tax 24                        
Flood water damage, number of sites   4                      
Recoveries from insurance carriers on flood damage 40                        
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                    
Commitments and contingencies:                          
Licensing agreement term (in years)       3                  
Number of days in which distributors can terminate agreements without cause (in days)       60                  
Number of days in which distributors can terminate agreements with cause (in days)       30                  
Guarantee obligations, maximum exposure         45     18   19      
Long-term purchase commitment, penalty exposure         40 39              
Annual commitment under purchase contract with emission solutions business supplier         73                
Percentage of equity method investment ownership (as a percent)             50.00%   49.00%        
Term of debt financing arrangements (in years)                 4        
Line of credit facility, maximum borrowing capacity, at current exchange rates             190   101        
Guarantee obligations, line of credit percent guaranteed (as a percent)             50.00%   49.00%        
Guarantee obligations, maximum exposure at maximum borrowing capacity, at current exchange rates             95   50        
Outstanding borrowings under the agreement               129   39      
Liability for the guarantee, fair value, maximum               18   19      
Guarantee obligations, current carrying value               1   1 81 78  
Guarantee obligations commitment                         82
Joint venture estimated commitment to be funded next year                         $ 74