Business Combinations - Preliminary Purchase Price Allocation (Details) - Ingersoll Rand Industrial - USD ($) $ in Millions	Sep. 30, 2020	Feb. 29, 2020	Jun. 30, 2021
Purchase Price [Abstract]
Fair value of Ingersoll Rand common stock issued for Ingersoll Rand Industrial outstanding common stock			$ 6,919.5
Fair value attributable to pre-merger service for replacement equity awards	$ 8.6
Fair value attributable to pre-merger service for deferred compensation plan	8.9
Purchase consideration	$ 6,937.0	$ 6,937.0

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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