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Other Income (Expense), Net (Details) - USD ($) $ in Millions	3 Months Ended	8 Months Ended		9 Months Ended	10 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2013	Dec. 31, 2013	Sep. 30, 2015	Oct. 31, 2013	Dec. 31, 2015	Dec. 31, 2014
Loss Contingencies [Line Items]
Other Nonoperating Income (Expense)	$ 1.4			$ 19.8
Successor [Member]
Loss Contingencies [Line Items]
Legal settlement		$ 0.0				$ 17.7	$ 0.0
Sale of intellectual property and product rights		0.0				6.1	0.0
Acquisition put option settlement		0.0				3.0	0.0
Other income (expense), net		0.1				3.6	(0.2)
Other Nonoperating Income (Expense)		$ 0.1	$ 0.1			$ 30.4	$ (0.2)
Predecessor [Member]
Loss Contingencies [Line Items]
Legal settlement					$ 0.0
Sale of intellectual property and product rights					0.0
Acquisition put option settlement					0.0
Other income (expense), net					(0.7)
Other Nonoperating Income (Expense)					$ (0.7)