Commitments and Contingencies (Cost/Income Asbestos Related Claims after Recoveries) (Details) - Asbestos [Member] - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2018	Mar. 31, 2017
Continuing operations	$ 1.5	$ 0.0
Discontinued operations	(7.2)	(3.3)
Total	$ (5.7)	$ (3.3)

Discontinued Operations Costs Income Asbestos Related Settlement And Defense

No definition available.

Name:	ir_DiscontinuedOperationsCostsIncomeAsbestosRelatedSettlementAndDefense
Namespace Prefix:	ir_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration