COMMITMENTS AND CONTINGENCIES (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended	9 Months Ended				1 Months Ended		1 Months Ended			9 Months Ended	1 Months Ended		12 Months Ended
	Jun. 30, 2008 Location	Sep. 25, 2011	Sep. 26, 2010	Sep. 25, 2011 U.S. Distributor Commitments Day Year	Sep. 25, 2011 Other Guarantees and Commitments	Jul. 31, 2008 Manufacturing - Beijing Foton Cummins Engine Co., Ltd.	Sep. 25, 2011 Manufacturing - Beijing Foton Cummins Engine Co., Ltd.	Feb. 28, 2010 Cummins Olayan Energy Limited Guarantee Year	Sep. 25, 2011 Cummins Olayan Energy Limited Guarantee	Sep. 25, 2011 Performance bonds and other performance-related guarantees	Sep. 25, 2011 Joint Venture Commitments	Sep. 30, 2011 Sale and Leaseback Transaction Amendment and Extension Year	Feb. 28, 2009 Sale and Leaseback Transaction Amendment and Extension Year	Dec. 31, 2001 Sale and Leaseback Transaction Amendment and Extension Year
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
Claims submitted to insurance carriers on flood damage including claim for business interruption		220
Recoveries from insurance carriers on flood damage		92
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					58		37		21
Long-term Purchase Commitment, Penalty Exposure					55
Long-term purchase commitment, parts supplier, penalty exposure					49
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						188		101
Guarantee obligations, line of credit percent guaranteed (as a percent)						50.00%		49.00%
Outstanding borrowings under the agreement							73		43
Guarantee obligations, maximum exposure at maximum borrowing capacity, at current exchange rates						94		50
Guarantee obligations, current carrying value							1		1	78
Guarantee obligations investment funding expected in current year											83
Guarantee obligations commitment											122
Sale Leaseback Transaction, term of lease (in years)														11.5
Sale Leaseback Transaction, Extension of lease term (in years)													2
Sale Leaseback Transaction, reduction in noncontrolling interests and increase in capital lease liabilities													35
Purchase price of leased asset												48.0
Purchase price of leased asset exceeding capital lease obligation												$ 14.0
Estimated remaining useful life of previously leased asset (in years)												10