Termination of Agreement with Private Equity Firm (Details) (Contract Termination [Member], USD $) In Millions, unless otherwise specified	3 Months Ended	4 Months Ended	12 Months Ended
Jun. 27, 2010	Apr. 06, 2010	Dec. 31, 2010
Contract Termination [Member]
Restructuring Cost and Reserve [Line Items]
Merger termination costs paid	$ 6.5	$ 16.0	$ 10.4

The amount of cash paid during the reporting period for charges associated with the mergers.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 28

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 230

-SubTopic 10

-Section 45

-Paragraph 25

-Subparagraph (g)

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3536-108585

Name:	us-gaap_PaymentsForMergerRelatedCosts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration