CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Millions, $ in Millions	Total	Total Ingersoll Rand Inc. Stockholders' Equity	Common Stock	Capital in Excess of Par Value	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock	Noncontrolling Interests
Balance at beginning of period (in shares) at Dec. 31, 2020			420.1
Balance at beginning of period at Dec. 31, 2020	$ 9,189.5	$ 9,119.7	$ 4.2	$ 9,310.3	$ (175.7)	$ 14.2	$ (33.3)	$ 69.8
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(90.1)	(90.4)			(90.4)			0.3
Issuance of common stock for stock-based compensation plans (in shares)			0.8
Issuance of common stock for stock-based compensation plans	4.7	4.7		4.7
Purchases of treasury stock	(3.0)	(3.0)					(3.0)
Issuance of treasury stock for stock-based compensation plans	0.4	0.4		(1.1)			1.5
Stock-based compensation	23.9	23.9		23.9
Other comprehensive income (loss), net of tax	(99.7)	(98.6)				(98.6)		(1.1)
Balance at end of period (in shares) at Mar. 31, 2021			420.9
Balance at end of period at Mar. 31, 2021	9,025.7	8,956.7	$ 4.2	9,337.8	(266.1)	(84.4)	(34.8)	69.0
Balance at beginning of period (in shares) at Dec. 31, 2021			423.8
Balance at beginning of period at Dec. 31, 2021	9,071.2	9,001.5	$ 4.3	9,408.6	378.6	(41.6)	(748.4)	69.7
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	104.5	103.7			103.7			0.8
Dividends declared	(8.2)	(8.2)			(8.2)
Issuance of common stock for stock-based compensation plans (in shares)			0.7
Issuance of common stock for stock-based compensation plans	4.5	4.5		4.5
Purchases of treasury stock	(101.1)	(101.1)					(101.1)
Issuance of treasury stock for stock-based compensation plans	0.7	0.7		(2.0)			2.7
Stock-based compensation	21.0	21.0		21.0
Other comprehensive income (loss), net of tax	(29.3)	(29.9)				(29.9)		0.6
Balance at end of period (in shares) at Mar. 31, 2022			424.5
Balance at end of period at Mar. 31, 2022	$ 9,063.3	$ 8,992.2	$ 4.3	$ 9,432.1	$ 474.1	$ (71.5)	$ (846.8)	$ 71.1