Quarterly report pursuant to Section 13 or 15(d)

EQUITY, ROYALTY AND INTEREST INCOME FROM INVESTEES (Details)

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EQUITY, ROYALTY AND INTEREST INCOME FROM INVESTEES (Details) (USD $)
In Millions
 3 Months Ended 6 Months Ended
Jun. 26, 2011
Jun. 27, 2010
Jun. 26, 2011
Jun. 27, 2010
Equity, royalty and interest income from investees:        
Cummins share of net income $ 103 $ 89 $ 190 $ 158
Royalty and interest income 14 8 23 15
Equity, royalty and interest income from investees 117 97 213 173
Distribution - North American distributors
        
Equity, royalty and interest income from investees:        
Cummins share of net income 35 23 65 46
Distribution - Komatsu Cummins Chile, Ltda.
        
Equity, royalty and interest income from investees:        
Cummins share of net income 6 3 10 6
Distribution - All other distributors
        
Equity, royalty and interest income from investees:        
Cummins share of net income 1 1 2 2
Manufacturing - Dongfeng Cummins Engine Company, Ltd.
        
Equity, royalty and interest income from investees:        
Cummins share of net income 26 34 49 52
Manufacturing - Chongqing Cummins Engine Company, Ltd.
        
Equity, royalty and interest income from investees:        
Cummins share of net income 19 13 31 23
Manufacturing - Shanghai Fleetguard Filter Co. Ltd.
        
Equity, royalty and interest income from investees:        
Cummins share of net income 4 4 8 6
Manufacturing - Tata Cummins Ltd.
        
Equity, royalty and interest income from investees:        
Cummins share of net income 3 3 7 7
Manufacturing - Cummins Westport, Inc
        
Equity, royalty and interest income from investees:        
Cummins share of net income 3 2 4 5
Manufacturing - Valvoline Cummins, Ltd.
        
Equity, royalty and interest income from investees:        
Cummins share of net income 2 3 4 5
Manufacturing - Komatsu manufacturing alliances
        
Equity, royalty and interest income from investees:        
Cummins share of net income (1) 3 1 5
Manufacturing - Beijing Foton Cummins Engine Co., Ltd.
        
Equity, royalty and interest income from investees:        
Cummins share of net income (1) (4) (3) (6)
Manufacturing - All other manufacturers
        
Equity, royalty and interest income from investees:        
Cummins share of net income $ 6 $ 4 $ 12 $ 7