Commitments and Contingencies (Cost/Income Asbestos Related Claims after Recoveries) (Details) - Asbestos [Member] - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Continuing operations	$ (0.7)	$ (2.6)	$ 0.8	$ (2.6)
Discontinued operations	(2.3)	16.0	(9.5)	12.7
Total	$ (3.0)	$ 13.4	$ (8.7)	$ 10.1

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