Business Combinations - Property, Plant and Equipment (Details) - USD ($) $ in Millions	Sep. 30, 2020	Feb. 29, 2020
Property, Plant and Equipment [Abstract]
Preliminary fair value of property, plant and equipment		$ 518.7
Ingersoll Rand Industrial
Property, Plant and Equipment [Abstract]
Preliminary fair value of property, plant and equipment	$ 518.7	520.0
Ingersoll Rand Industrial | Land and buildings
Property, Plant and Equipment [Abstract]
Preliminary fair value of property, plant and equipment		217.1
Ingersoll Rand Industrial | Machinery and equipment
Property, Plant and Equipment [Abstract]
Preliminary fair value of property, plant and equipment		257.1
Ingersoll Rand Industrial | Office furniture and equipment
Property, Plant and Equipment [Abstract]
Preliminary fair value of property, plant and equipment		13.4
Ingersoll Rand Industrial | Other
Property, Plant and Equipment [Abstract]
Preliminary fair value of property, plant and equipment		1.0
Ingersoll Rand Industrial | Construction in progress
Property, Plant and Equipment [Abstract]
Preliminary fair value of property, plant and equipment		$ 30.1