CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Income Statement [Abstract]
Revenues	$ 1,279.1	$ 1,025.4	$ 2,408.6	$ 1,642.2
Cost of sales	766.4	716.8	1,443.8	1,130.3
Gross Profit	512.7	308.6	964.8	511.9
Selling and administrative expenses	267.2	209.1	519.5	348.5
Amortization of intangible assets	80.3	96.4	164.5	143.1
Other operating expense, net	25.1	48.1	19.4	144.6
Operating Income (Loss)	140.1	(45.0)	261.4	(124.3)
Interest expense	22.7	30.8	45.8	57.9
Loss on extinguishment of debt	0.0	0.0	0.0	2.0
Other income, net	(34.1)	(2.3)	(36.6)	(2.5)
Income (Loss) from Continuing Operations Before Income Taxes	151.5	(73.5)	252.2	(181.7)
Provision for income taxes	12.5	78.4	23.1	11.5
Loss on equity method investments	(0.7)	0.0	(0.7)	0.0
Income (Loss) from Continuing Operations	138.3	(151.9)	228.4	(193.2)
Income (loss) from discontinued operations, net of tax	96.3	(24.6)	(83.9)	(20.2)
Net Income (Loss)	234.6	(176.5)	144.5	(213.4)
Less: Net income attributable to noncontrolling interests	0.7	1.1	1.0	1.0
Net Income (Loss) Attributable to Ingersoll Rand Inc.	233.9	(177.6)	143.5	(214.4)
Amounts attributable to Ingersoll Rand Inc. common stockholders:
Income (loss) from continuing operations, net of tax	137.6	(153.0)	227.4	(194.2)
Income (loss) from discontinued operations, net of tax	96.3	(24.6)	(83.9)	(20.2)
Net income (loss) attributable to Ingersoll Rand Inc.	$ 233.9	$ (177.6)	$ 143.5	$ (214.4)
Basic earnings (loss) per share of common stock:
Earnings (loss) from continuing operations (in usd per share)	$ 0.33	$ (0.37)	$ 0.54	$ (0.56)
Earnings (loss) from discontinued operations (in usd per share)	0.23	(0.06)	(0.20)	(0.06)
Net earnings (loss) (in usd per share)	0.56	(0.43)	0.34	(0.62)
Diluted earnings (loss) per share of common stock:
Earnings (loss) from continuing operations (in usd per share)	0.32	(0.37)	0.53	(0.56)
Earnings (loss) from discontinued operations (in usd per share)	0.23	(0.06)	(0.20)	(0.06)
Net earnings (loss) (in usd per share)	$ 0.55	$ (0.43)	$ 0.34	$ (0.62)