Chapter 11 Reorganization (Details 2) (USD $) In Millions, unless otherwise specified	Apr. 30, 2010 facility
Financing at Emergence
Number of exit financing facilities	2
Senior secured first lien credit facility
Financing at Emergence
Maximum borrowing capacity of revolving loan	$ 890.0
Revolving loan facility
Financing at Emergence
Current borrowing capacity	120.0
Exit First Lien Facility
Financing at Emergence
Maximum borrowing capacity of revolving loan	770.0
Senior secured second lien term loan facility
Financing at Emergence
Maximum borrowing capacity of revolving loan	250.0
TW Loan \| TW Borrowers
Financing at Emergence
Maximum borrowing capacity of revolving loan	$ 150.0

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 129

-Paragraph 2, 4

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant