Income Taxes - Schedule of Total Gross Unrecognized Tax Benefits (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended	12 Months Ended
Jan. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Ending Balance		$ 5.3us-gaap_UnrecognizedTaxBenefits	$ 38.9us-gaap_UnrecognizedTaxBenefits
Successor [Member]
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning Balance	0	38.9	0
Increases related to acquisition	0	0	11.3
Increases related to positions taken on items from prior years	0	0	0
Decreases related to positions taken on items from prior years	0	(33.6)	0
Increases related to positions taken in the current year	0	0	27.6
Settlement of uncertain tax positions with tax authorities	0	0	0
Decreases due to expiration of statutes of limitations	0	0	0
Ending Balance	0	5.3	38.9
Predecessor [Member]
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning Balance	0		0	0
Increases related to acquisition	0			0
Increases related to positions taken on items from prior years	0			0
Decreases related to positions taken on items from prior years	0			0
Increases related to positions taken in the current year	0			0
Settlement of uncertain tax positions with tax authorities	0			0
Decreases due to expiration of statutes of limitations	0			0
Ending Balance	$ 0			$ 0

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Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Unrecognized Tax Benefit

-URI http://asc.fasb.org/extlink&oid=6527854

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

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Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

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Amount of increase in unrecognized tax benefits resulting from acquisitions.

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Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

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Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of increase in unrecognized tax benefits resulting from settlements with taxing authorities.

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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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