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Long-term Debt (Details) (USD $) In Millions, except Per Share data, unless otherwise specified | 1 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Aug. 31, 2011 | Sep. 30, 2011 | Dec. 31, 2010
Debt Instrument |  |  |  |  |
Total long-term debt |  | $ 1,574.7 |  | $ 1,622.2 |
Less: current portion |  | 408.5 | [1] | 38.9 | [1]
Long-term debt, excluding current portion |  | 1,166.2 |  | 1,583.3 |
7.25% Senior Unsecured Notes due 2011 |  |  |  |  |
Debt Instrument |  |  |  |  |
Effective Interest Rate |  | 7.25% | [2] |  |
Stated Interest Rate |  | 7.25% |  |  |
Debt Maturity Date |  | Aug. 15, 2011 |  |  |
Book Value |  | 0 |  | 36.3 |
Fair Value |  | 0 | [3] | 37.0 | [3]
Aggregate principal amount matured | 36.3 |  |  |  |
Amount paid, including accrued and unpaid interest for debt maturity | 37.6 |  |  |  |
6.25% Senior Unsecured Notes due 2014 |  |  |  |  |
Debt Instrument |  |  |  |  |
Effective Interest Rate |  | 6.29% | [2] |  |
Stated Interest Rate |  | 6.25% |  |  |
Debt Maturity Date |  | Nov. 15, 2014 |  |  |
Book Value |  | 354.6 |  | 353.3 |
Fair Value |  | 370.1 | [3] | 378.0 | [3]
Unamortized Discount |  | 0.3 |  |  |
Face Value |  | 350.0 |  |  |
10.00% Senior Unsecured Notes due 2017 |  |  |  |  |
Debt Instrument |  |  |  |  |
Effective Interest Rate |  | 10.38% |  |  |
Stated Interest Rate |  | 10.00% |  |  |
Debt Maturity Date |  | Jul. 15, 2017 |  |  |
Book Value |  | 590.3 |  | 589.4 |
Fair Value |  | 681.0 | [3] | 705.0 | [3]
Unamortized Discount |  | 9.7 |  |  |
4.75% Convertible Senior Notes due 2023 |  |  |  |  |
Debt Instrument |  |  |  |  |
Effective Interest Rate |  | 3.50% |  |  |
Stated Interest Rate |  | 4.75% |  |  |
Debt Maturity Date |  | Mar. 15, 2023 |  |  |
Book Value |  | 203.3 |  | 205.0 |
Fair Value |  | 213.8 | [3] | 235.0 | [3]
Unamortized Premium |  | 3.3 |  |  |
Capped call, shares that may be purchased |  | 16.3 |  |  |
Capped call, strike price before adjustment |  | $ 12.42 |  |  |
Capped call, strike price |  | $ 12.30 |  |  |
Capped call, cap price before adjustment |  | $ 18.26 |  |  |
Capped call, cap price |  | $ 18.08 |  |  |
4.25% Convertible Senior Notes due 2023 |  |  |  |  |
Debt Instrument |  |  |  |  |
Effective Interest Rate |  | 0.58% |  |  |
Stated Interest Rate |  | 4.25% |  |  |
Debt Maturity Date |  | Mar. 15, 2023 |  |  |
Book Value |  | 406.6 |  | 417.4 |
Fair Value |  | 404.5 | [3] | 444.4 | [3]
Unamortized Premium |  | 6.6 |  |  |
Call Date of Convertible Senior Notes |  | Mar. 15, 2012 |  |  |
Other notes payable and capitalized leases |  |  |  |  |
Debt Instrument |  |  |  |  |
Book Value |  | $ 19.9 |  | $ 20.8 |
[1] | On March 15, 2012, holders of our 4.25% Convertible Senior Notes due 2023 (the “4.25% Notes”) may require us to repurchase their notes for cash at par and as such, we included these notes in the current portion of long-term debt on our September 30, 2011 unaudited Consolidated Balance Sheet. Any 4.25% Notes not repurchased on March 15, 2012 will be reclassified to long-term debt.
[2] | Excludes the effect of related interest rate swaps.
[3] | Fair values are derived from trading quotes by institutions making a market in the securities and estimations of value by those institutions using proprietary models.

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- Definition The earliest date, before maturity, on which the issuer can call the outstanding debt instrument for repayment or conversion to equity, which may be presented in a variety of ways (year only, month and year, day, month and year, quarter, etc.). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823 Reference 2: 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 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 + Details
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- Definition Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date. May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer, and after deducting unamortized discount or premiums, if any. + References Reference 1: 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) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 7 -Section 03 -Paragraph 16 Reference 4: http://www.xbrl.org/2003/role/presentationRef -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 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20, 22 -Article 5 + Details
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- Definition Total of the portions of the carrying amounts as of the balance sheet date of long-term debt, which may include notes payable, bonds payable, debentures, mortgage loans, and commercial paper, which are scheduled to be repaid within one year or the normal operating cycle, if longer, and after deducting unamortized discount or premiums, if any. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19 -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 210.5-02.19,20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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