Liquidity - Additional Information (Details) - Subsequent Event [Member] - USD ($) $ in Millions		3 Months Ended
Feb. 09, 2018	Mar. 31, 2018
Second Lien Notes [Member]
Reorganization Items [Line Items]
Face amount of debt	$ 250.0
Term Loan [Member] \| 2018 Term Loan [Member]
Reorganization Items [Line Items]
Face amount of debt	1,200.0
Covenant waiver, additional payment		$ 30.0
Discharge of debt [Member]
Reorganization Items [Line Items]
Reorganization item, extinguishment of debt	$ 807.0

Amount of reorganization items related to discharge of claims and liabilities upon emergence from bankruptcy.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 852
-SubTopic 10
-Section 45
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=64805424&loc=d3e55730-112764

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 852
-SubTopic 10
-Section 55
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=84165509&loc=d3e56145-112766

Name:	us-gaap_DebtorReorganizationItemsDischargeOfClaimsAndLiabilities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration