Commitments and Contingencies - Capital Commitments (Details) $ in Millions	Dec. 31, 2017 USD ($)
Loss Contingencies [Line Items]
Unfunded commitment	$ 3,838.7
Unfunded commitment to be paid by senior Carlyle executives and professionals	3,400.0
Corporate Private Equity
Loss Contingencies [Line Items]
Unfunded commitment	2,354.2
Real Assets
Loss Contingencies [Line Items]
Unfunded commitment	812.0
Global Credit
Loss Contingencies [Line Items]
Unfunded commitment	526.0
Investment Solutions
Loss Contingencies [Line Items]
Unfunded commitment	$ 146.5