EQUITY - KWE Acquisition (Details) - USD ($) $ in Millions		12 Months Ended
Oct. 20, 2017	Dec. 31, 2017
Noncontrolling Interests [Member]
Class of Stock [Line Items]
Special distributions and stub period dividend to noncontrolling interest holders	$ 719.8
Common Stock [Member]
Class of Stock [Line Items]
Issuance of common stock (in shares)	37,226,695	37,226,695

Number of new stock issued during the period.

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