CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Statement [Abstract]
Revenues	$ 5,152,400,000	$ 3,973,200,000	$ 2,017,500,000
Cost of sales	3,163,900,000	2,568,300,000	1,239,200,000
Gross Profit	1,988,500,000	1,404,900,000	778,300,000
Selling and administrative expenses	1,028,000,000	789,300,000	409,600,000
Amortization of intangible assets	332,900,000	335,100,000	105,300,000
Impairment of other intangible assets	0	19,900,000	0
Other operating expense, net	61,900,000	201,000,000.0	69,300,000
Operating Income	565,700,000	59,600,000	194,100,000
Interest expense	87,700,000	111,100,000	88,400,000
Loss on extinguishment of debt	9,000,000.0	2,000,000.0	200,000
Other income, net	(44,000,000.0)	(8,100,000)	(4,700,000)
Income (Loss) Before Income Taxes	513,000,000.0	(45,400,000)	110,200,000
Provision (benefit) for income taxes	(21,800,000)	11,400,000	12,900,000
Loss on equity method investments	(11,400,000)	0	0
Income (Loss) from Continuing Operations	523,400,000	(56,800,000)	97,300,000
Income from discontinued operations, net of tax	41,600,000	24,400,000	61,800,000
Net Income (Loss)	565,000,000.0	(32,400,000)	159,100,000
Less: Net income attributable to noncontrolling interests	2,500,000	900,000	0
Net Income (Loss) Attributable to Ingersoll Rand Inc.	562,500,000	(33,300,000)	159,100,000
Amounts attributable to Ingersoll Rand Inc. common stockholders:
Income (loss) from continuing operations, net of tax	520,900,000	(57,700,000)	97,300,000
Income from discontinued operations, net of tax	41,600,000	24,400,000	61,800,000
Net Income (Loss) Attributable to Ingersoll Rand Inc.	$ 562,500,000	$ (33,300,000)	$ 159,100,000
Basic earnings (loss) per share of common stock:
Earnings (loss) from continuing operations (USD per share)	$ 1.26	$ (0.15)	$ 0.48
Earnings (loss) from discontinued operations (USD per share)	0.10	0.06	0.30
Net earnings (loss) (USD per share)	1.36	(0.09)	0.78
Diluted earnings (loss) per share of common stock:
Earnings (loss) from continuing operations (USD per share)	1.24	(0.15)	0.47
Earnings (loss) from discontinued operations (USD per share)	0.10	0.06	0.30
Net earnings (loss) (USD per share)	$ 1.34	$ (0.09)	$ 0.76