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Commitments and Contingencies (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Environmental Remediation Expense $ 5.2us-gaap_EnvironmentalRemediationExpense $ (0.5)us-gaap_EnvironmentalRemediationExpense $ 3.1us-gaap_EnvironmentalRemediationExpense
Reserves for environmental matters 45.2us-gaap_AccrualForEnvironmentalLossContingencies 47.9us-gaap_AccrualForEnvironmentalLossContingencies  
Reserve for environmental matters, current 17.1us-gaap_AccruedEnvironmentalLossContingenciesCurrent 13.5us-gaap_AccruedEnvironmentalLossContingenciesCurrent  
Maximum annual inflation rate 2.50%ir_ExpectedAnnualInflationRate    
Minimum annual inflation rate 1.50%ir_AdjustedExpectedAnnualInflationRate    
Percentage of non-malignant claims, minimum 80.00%ir_PercentageOfNonmalignantClaimsMinimum    
Total rental expense 171.6us-gaap_LeaseAndRentalExpense 165.0us-gaap_LeaseAndRentalExpense 167.0us-gaap_LeaseAndRentalExpense
Minimum lease payments, due in current year 114.8us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent    
Minimum lease payments, due in second year 91.0us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears    
Minimum lease payments, due in third year 70.4us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears    
Minimum lease payments, due in fourth year 50.0us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears    
Minimum lease payments, due in fifth year 38.3us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears    
Commitments and performance guarantees 426.3ir_CommitmentsAndPerformanceGuarantees    
Trane [Member]      
Settled with majority of insurers 95.00%ir_SettledWithMajorityOfInsurers
/ dei_LegalEntityAxis
= ir_TraneMember
   
Segment, Discontinued Operations [Member]      
Reserves for environmental matters 36.3us-gaap_AccrualForEnvironmentalLossContingencies
/ us-gaap_StatementOperatingActivitiesSegmentAxis
= us-gaap_SegmentDiscontinuedOperationsMember
42.1us-gaap_AccrualForEnvironmentalLossContingencies
/ us-gaap_StatementOperatingActivitiesSegmentAxis
= us-gaap_SegmentDiscontinuedOperationsMember
 
Asbestos Issue [Member]      
Total Asset For Probable Asbestos Related Insurance Recoveries 335.7ir_TotalAssetForProbableAsbestosRelatedInsuranceRecoveries
/ us-gaap_StatementScenarioAxis
= us-gaap_AsbestosIssueMember
321.8ir_TotalAssetForProbableAsbestosRelatedInsuranceRecoveries
/ us-gaap_StatementScenarioAxis
= us-gaap_AsbestosIssueMember
 
Asbestos Issue [Member] | IR New Jersey [Member]      
Total Asset For Probable Asbestos Related Insurance Recoveries 176.8ir_TotalAssetForProbableAsbestosRelatedInsuranceRecoveries
/ dei_LegalEntityAxis
= ir_IrNewJerseyMember
/ us-gaap_StatementScenarioAxis
= us-gaap_AsbestosIssueMember
137.4ir_TotalAssetForProbableAsbestosRelatedInsuranceRecoveries
/ dei_LegalEntityAxis
= ir_IrNewJerseyMember
/ us-gaap_StatementScenarioAxis
= us-gaap_AsbestosIssueMember
 
Asbestos Issue [Member] | Trane [Member]      
Total Asset For Probable Asbestos Related Insurance Recoveries $ 158.9ir_TotalAssetForProbableAsbestosRelatedInsuranceRecoveries
/ dei_LegalEntityAxis
= ir_TraneMember
/ us-gaap_StatementScenarioAxis
= us-gaap_AsbestosIssueMember
$ 184.4ir_TotalAssetForProbableAsbestosRelatedInsuranceRecoveries
/ dei_LegalEntityAxis
= ir_TraneMember
/ us-gaap_StatementScenarioAxis
= us-gaap_AsbestosIssueMember