Annual report pursuant to Section 13 and 15(d)

EARNINGS PER SHARE (Details)

v2.4.1.9
EARNINGS PER SHARE (Details) (USD $)
In Millions, except Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Earnings Per Share [Abstract]      
Net income attributable to Cummins Inc. $ 1,651us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic $ 1,483us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic $ 1,645us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
Weighted-average common shares outstanding:      
Basic (in shares) 182,637,568us-gaap_WeightedAverageNumberOfSharesOutstandingBasic 186,994,382us-gaap_WeightedAverageNumberOfSharesOutstandingBasic 189,286,821us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Dilutive effect of stock compensation awards (in shares) 441,727us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements 423,459us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements 381,883us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
Diluted (in shares) 183,079,295us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 187,417,841us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 189,668,704us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Earnings per common share attributable to Cummins Inc.      
Basic (in dollars per share) $ 9.04us-gaap_EarningsPerShareBasic $ 7.93us-gaap_EarningsPerShareBasic $ 8.69us-gaap_EarningsPerShareBasic
Diluted (in dollars per share) $ 9.02us-gaap_EarningsPerShareDiluted $ 7.91us-gaap_EarningsPerShareDiluted $ 8.67us-gaap_EarningsPerShareDiluted
Weighted-average shares, common stock options excluded (in shares) 165,840us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount 359,641us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount 453,893us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount