Cummins Inc. Quarterly report pursuant to Section 13 or 15(d)

EQUITY, ROYALTY AND INTEREST INCOME FROM INVESTEES (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 29, 2015	Mar. 30, 2014
Equity, royalty and interest income from investees
Cummins share of net income	$ 58	$ 79
Royalty and interest income	10	11
Equity, royalty and interest income from investees	68	90
Distribution - North American distributors
Equity, royalty and interest income from investees
Cummins share of net income	10	32
Distribution - Komatsu Cummins Chile, Ltda.
Equity, royalty and interest income from investees
Cummins share of net income	7	6
Distribution - All other distributors
Equity, royalty and interest income from investees
Cummins share of net income	1	1
Manufacturing - Dongfeng Cummins Engine Company, Ltd.
Equity, royalty and interest income from investees
Cummins share of net income	14	14
Manufacturing - Chongqing Cummins Engine Company, Ltd.
Equity, royalty and interest income from investees
Cummins share of net income	12	11
Manufacturing - Beijing Foton Cummins Engine Company (Light-Duty)
Equity, royalty and interest income from investees
Cummins share of net income	8	6
Manufacturing - Beijing Foton Cummins Engine Company (Heavy-Duty)
Equity, royalty and interest income from investees
Cummins share of net income	(1)	(6)
Manufacturing - All other manufacturers
Equity, royalty and interest income from investees
Cummins share of net income	$ 7	$ 15