Lease Arrangements (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended	10 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Nov. 15, 2010 Predecessor
Lease Arrangements
Rent expense	$ 68.6	$ 74.2	$ 9.8	$ 66.8
Facility rent less amortization of any deferred gain on applicable lease transactions	$ 65.9	$ 64.8	$ 8.4	$ 57.4

Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41499-112717

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