Accumulated Other Comprehensive Loss - Reclassifications out of AOCI (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Income Statement [Abstract]
Interest expense	$ 36.8	$ 38.9
Provision for income taxes	54.4	48.1
Net Income Attributable to Ingersoll Rand Inc.	202.2	161.1
Reclassification out of Accumulated Other Comprehensive Loss
Income Statement [Abstract]
Net Income Attributable to Ingersoll Rand Inc.	(7.0)	(5.9)
Cash Flow Hedges | Reclassification out of Accumulated Other Comprehensive Loss
Income Statement [Abstract]
Interest expense	(4.7)	(2.0)
Provision for income taxes	1.2	0.5
Net Income Attributable to Ingersoll Rand Inc.	(3.5)	(1.5)
Net investment hedges | Reclassification out of Accumulated Other Comprehensive Loss
Income Statement [Abstract]
Interest expense	(4.2)	(5.4)
Provision for income taxes	1.1	1.4
Net Income Attributable to Ingersoll Rand Inc.	(3.1)	(4.0)
Pension and Other Postretirement Benefit Plans | Reclassification out of Accumulated Other Comprehensive Loss
Income Statement [Abstract]
Amortization of defined benefit pension and other postretirement benefit items	(0.5)	(0.5)
Provision for income taxes	0.1	0.1
Net Income Attributable to Ingersoll Rand Inc.	$ (0.4)	$ (0.4)