Subsequent Events Credit Facility (Details) In Millions	6 Months Ended
Jun. 30, 2011 USD ($)	Jul. 29, 2011 USD ($)	Jul. 29, 2011 Revolving Loan [Member] USD ($)	Jul. 29, 2011 United States Term Loan [Member] USD ($)	Jul. 29, 2011 Australian Term Loan [Member] USD ($)	Jul. 29, 2011 Australian Term Loan [Member] AUD	Jul. 29, 2011 Canadian Term Loan [Member] USD ($)	Jul. 29, 2011 Canadian Term Loan [Member] CAD
Subsequent Event [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 620.0	$ 750.0	$ 425.0	$ 200.0	$ 100.0	92.2	$ 25.0	23.6
Debt Instrument, Maturity Date	Jul. 29, 2016

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 19, 22
-Article 5

Reference 3: 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

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