DEBT AND OTHER OBLIGATIONS - Schedule of Interest Expense (Details) - USD ($) $ in Millions	1 Months Ended	11 Months Ended	12 Months Ended
	Jan. 31, 2015	Dec. 31, 2015	Dec. 31, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Non-recourse funding obligations, other obligations, and repurchase agreements		$ 106.4	$ 177.7	$ 170.8
Total interest expense		$ 106.4	$ 177.7	$ 170.8
Predecessor
Debt Instrument [Line Items]
Non-recourse funding obligations, other obligations, and repurchase agreements	$ 10.0
Total interest expense	$ 10.0