SCHEDULE I - STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statements of Operations and Comprehensive Income [Abstract]
Revenues	$ 5,152.4	$ 3,973.2	$ 2,017.5
Cost of sales	3,163.9	2,568.3	1,239.2
Gross Profit	1,988.5	1,404.9	778.3
Other operating expense, net	61.9	201.0	69.3
Operating Income	565.7	59.6	194.1
Income (Loss) Before Income Taxes	513.0	(45.4)	110.2
Income tax provision (benefit)	(21.8)	11.4	12.9
Income (loss) from continuing operations	523.4	(56.8)	97.3
Income from discontinued operations, net of tax	41.6	24.4	61.8
Net Income (Loss) Attributable to Ingersoll Rand Inc.	562.5	(33.3)	159.1
Other comprehensive income (loss)	(54.3)	270.2	(0.8)
Comprehensive income attributable to Ingersoll Rand Inc.	508.2	236.9	158.3
Parent Company
Statements of Operations and Comprehensive Income [Abstract]
Revenues	0.0	0.0	0.0
Cost of sales	1.0	14.6	0.6
Gross Profit	(1.0)	(14.6)	(0.6)
Operating costs	67.9	30.9	10.4
Other operating expense, net	(8.4)	(4.9)	(47.0)
Operating Income	(60.5)	(40.6)	36.0
Interest income	(28.8)	42.5	42.3
Income (Loss) Before Income Taxes	(89.3)	1.9	78.3
Income tax provision (benefit)	(18.1)	(3.9)	(5.1)
Income (Loss) of Parent Company	(71.2)	5.8	83.4
Equity in undistributed income of subsidiaries	592.1	(63.5)	13.9
Income (loss) from continuing operations	520.9	(57.7)	97.3
Income from discontinued operations, net of tax	41.6	24.4	61.8
Net Income (Loss) Attributable to Ingersoll Rand Inc.	562.5	(33.3)	159.1
Other comprehensive income (loss)	(54.3)	270.2	(0.8)
Comprehensive income attributable to Ingersoll Rand Inc.	$ 508.2	$ 236.9	$ 158.3