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, 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	243.8	242.2			242.2			1.6
Dividends declared	(16.2)	(16.2)			(16.2)
Issuance of common stock for stock-based compensation plans (in shares)			0.8
Issuance of common stock for stock-based compensation plans	7.9	7.9		7.9
Purchases of treasury stock	(253.7)	(253.7)					(253.7)
Issuance of treasury stock for stock-based compensation plans	1.0	1.0		(3.2)			4.2
Stock-based compensation	43.6	43.6		43.6
Other comprehensive income (loss), net of tax	(253.6)	(249.4)				(249.4)		(4.2)
Balance at end of period (in shares) at Jun. 30, 2022			424.6
Balance at end of period at Jun. 30, 2022	8,844.0	8,776.9	$ 4.3	9,456.9	604.6	(291.0)	(997.9)	67.1
Balance at beginning of period (in shares) at Mar. 31, 2022			424.5
Balance at beginning 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
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	139.3	138.5			138.5			0.8
Dividends declared	(8.0)	(8.0)			(8.0)
Issuance of common stock for stock-based compensation plans (in shares)			0.1
Issuance of common stock for stock-based compensation plans	3.4	3.4		3.4
Purchases of treasury stock	(152.6)	(152.6)					(152.6)
Issuance of treasury stock for stock-based compensation plans	0.3	0.3		(1.2)			1.5
Stock-based compensation	22.6	22.6		22.6
Other comprehensive income (loss), net of tax	(224.3)	(219.5)				(219.5)		(4.8)
Balance at end of period (in shares) at Jun. 30, 2022			424.6
Balance at end of period at Jun. 30, 2022	8,844.0	8,776.9	$ 4.3	9,456.9	604.6	(291.0)	(997.9)	67.1
Balance at beginning of period (in shares) at Dec. 31, 2022			426.3
Balance at beginning of period at Dec. 31, 2022	9,257.2	9,195.8	$ 4.3	9,476.8	950.9	(251.7)	(984.5)	61.4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	344.0	340.6			340.6			3.4
Dividends declared	(16.2)	(16.2)			(16.2)
Issuance of common stock for stock-based compensation plans (in shares)			1.5
Issuance of common stock for stock-based compensation plans	13.7	13.7		13.7
Purchases of treasury stock	(133.2)	(133.2)					(133.2)
Issuance of treasury stock for stock-based compensation plans	2.2	2.2		(3.6)			5.8
Stock-based compensation	23.4	23.4		23.4
Other comprehensive income (loss), net of tax	(10.7)	(11.5)				(11.5)		0.8
Balance at end of period (in shares) at Jun. 30, 2023			427.8
Balance at end of period at Jun. 30, 2023	9,480.4	9,414.8	$ 4.3	9,510.3	1,275.3	(263.2)	(1,111.9)	65.6
Balance at beginning of period (in shares) at Mar. 31, 2023			427.5
Balance at beginning of period at Mar. 31, 2023	9,381.7	9,317.3	$ 4.3	9,493.6	1,103.9	(226.4)	(1,058.1)	64.4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	180.8	179.5			179.5			1.3
Dividends declared	(8.1)	(8.1)			(8.1)
Issuance of common stock for stock-based compensation plans (in shares)			0.3
Issuance of common stock for stock-based compensation plans	5.0	5.0		5.0
Purchases of treasury stock	(56.2)	(56.2)					(56.2)
Issuance of treasury stock for stock-based compensation plans	2.1	2.1		(0.3)			2.4
Stock-based compensation	12.0	12.0		12.0
Other comprehensive income (loss), net of tax	(36.9)	(36.8)				(36.8)		(0.1)
Balance at end of period (in shares) at Jun. 30, 2023			427.8
Balance at end of period at Jun. 30, 2023	$ 9,480.4	$ 9,414.8	$ 4.3	$ 9,510.3	$ 1,275.3	$ (263.2)	$ (1,111.9)	$ 65.6