Debt Long-Term Debt Instruments (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
Sep. 30, 2012	Dec. 31, 2011
Debt Instrument [Line Items]
Capital Lease Obligations	$ 5.8	$ 7.3
Other	18.0	11.2
Long-term Debt	1,977.2	2,365.8
Less: current portion	64.4	30.1
Total	1,912.8	2,335.7
Senior Notes with interest payable semi-annually at 7.875%, payable in 2018 ($250.0 million face amount)
Debt Instrument [Line Items]
Senior Notes payable	246.7	246.4
Debt Instrument, Fixed Interest Rate, Percentage	7.875%	7.875%
Debt Instrument, Maturity Date	Dec. 31, 2018	Dec. 31, 2018
Debt Instrument, Face Amount	250.0	250.0
Senior Notes with interest payable semi-annually at 9.5%, payable in 2017 ($425.0 million face amount)
Debt Instrument [Line Items]
Senior Notes payable	423.2	423.2
Debt Instrument, Fixed Interest Rate, Percentage	9.50%	9.50%
Debt Instrument, Maturity Date	Dec. 31, 2017	Dec. 31, 2017
Debt Instrument, Face Amount	425.0	425.0
Senior Secured Revolving Facility with interest payable at floating rates (2.23% at September 30, 2012) payable in 2017
Debt Instrument [Line Items]
Debt Instrument, Variable Interest Rate, Percentage	2.23%
Debt Instrument, Maturity Date	Dec. 31, 2017	Dec. 31, 2017
Term Loan Facility \| Senior Secured Term Loan Facility with interest payable at various dates at floating rates payable through 2014 - A
Debt Instrument [Line Items]
Senior Secured debt payable	0	769.0
Debt Instrument, Maturity Date	May 16, 2014	May 16, 2014
Term Loan Facility \| Senior Secured Term Loan Facility with interest payable at various dates at floating rates payable through 2014 - B
Debt Instrument [Line Items]
Senior Secured debt payable	0	908.7
Debt Instrument, Maturity Date	May 16, 2014	May 16, 2014
Term Loan Facility \| Senior Secured Term Loan Facility with interest payable at various dates at floating rates (2.23% at September 30, 2012) payable through 2017
Debt Instrument [Line Items]
Senior Secured debt payable	987.5	0
Debt Instrument, Variable Interest Rate, Percentage	2.23%
Debt Instrument, Maturity Date	Dec. 31, 2017	Dec. 31, 2017
Line of Credit \| Senior Secured Revolving Facility with interest payable at floating rates (2.23% at September 30, 2012) payable in 2017
Debt Instrument [Line Items]
Senior Secured debt payable	$ 296.0	$ 0

Long Term Debt and Capital Lease Obligations, Current and Noncurrent

No definition available.

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- Definition

Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 7

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6455398&loc=d3e45280-112737

+ Details

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- Definition

The stated principal amount of the debt instrument at time of issuance, which may vary from the carrying amount because of unamortized premium or discount.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 55

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=6584090&loc=d3e28878-108400

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-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 21

-Paragraph 16, 20

-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.

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- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

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 210.5-02.22(a)(2))

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

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-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.

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- Definition

Sum of the carrying values as of the balance sheet date of all long-term debt, which is debt initially having maturities due after one year from the balance sheet date or beyond the operating cycle, if longer, but excluding the portions thereof scheduled to be repaid within one year or the normal operating cycle, if longer plus capital lease obligations due to be paid more than one year after the balance sheet date.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22)

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

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-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 6

-Section H

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- Definition

Obligation related to long-term debt (excluding convertible debt) and capital leases, the portion which is due in one year or less in the future.

+ References

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- Definition

The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a set, unchanging rate.

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- Definition

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- Definition

Including both current and noncurrent portions, carrying amount as of the balance sheet date of other forms of debt not elsewhere specified in the taxonomy with initial maturities beyond one year or beyond the normal operating cycle, if longer.

+ References

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- Definition

Carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower.

+ References

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 20, 22

-Article 5

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16)

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

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-Paragraph 1

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 9

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- Definition

Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders.

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-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 9

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-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16(a))

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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