Quarterly report pursuant to Section 13 or 15(d)

ACQUISITIONS (Details)

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ACQUISITIONS (Details) (USD $)
In Millions, unless otherwise specified
6 Months Ended 0 Months Ended 12 Months Ended 0 Months Ended 12 Months Ended
Jun. 30, 2013
Dec. 31, 2012
May 31, 2013
Cummins Rocky Mountain LLC
Dec. 31, 2012
Cummins Rocky Mountain LLC
May 31, 2013
Cummins Rocky Mountain LLC
Customer
Minimum
May 31, 2013
Cummins Rocky Mountain LLC
Customer
Maximum
Jan. 31, 2013
Cummins Northwest
Dec. 31, 2012
Cummins Northwest
Business Acquisition                
Remaining interest acquired (as a percent)     67.00%       50.00%  
Cash paid for business acquisition     $ 62          
Cash consideration paid to creditors to eliminate all debt related to the acquired entity     74          
Gain (loss) from revaluation of pre-existing ownership interest in the acquiree company 12   5       7  
Ownership interest in the acquiree company, immediately prior to acquisition (as a percent)     33.00%       50.00%  
Purchase price distributed in future quarters     14          
The preliminary purchase price allocation, subject to finalization, was as follows:                
Accounts receivable     48          
Inventory     99          
Fixed assets     34          
Intangible assets     7          
Goodwill 450 445 6       3  
Other assets     9          
Current liabilities     (36)          
Total business valuation     167          
Fair value of pre-existing 33 percent interest     (31)          
Purchase price     136       18  
Other information                
Net sales prior to acquisition       $ 384       $ 137
Weighted average amortization life         1 year 4 years    
Ownership in partnership formed, post acquisition (as a percent)             79.99%  
Third party ownership in partnership formed, post acquisition (as a percent)             20.01%