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Long-term Debt (Details) (USD $) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Dec. 31, 2012
Debt Instrument |  |  |  |  |  |  |  |
Total long-term debt | $ 1,483,200,000 |  |  | $ 1,483,200,000 |  |  | $ 2,277,400,000 |
Less: current portion | 2,200,000 | [1] |  | 2,200,000 | [1] |  | 216,600,000 | [1]
Long-term debt, excluding current portion | 1,481,000,000 |  |  | 1,481,000,000 |  |  | 2,060,800,000 |
Loss on early extinguishment of debt | 45,200,000 |  | 0 | 45,200,000 |  | 0 |  |
Exercised Call Option, Shares, Acquired, Net Share Settlement | 1,500,000 |  |  | 1,500,000 |  |  |  |
6.25% Senior Unsecured Notes due 2014 |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |
Effective Interest Rate | 6.29% |  |  | 6.29% |  |  |  |
Book Value | 351,600,000 |  |  | 351,600,000 |  |  | 352,800,000 |
Fair Value | 369,400,000 | [2] |  | 369,400,000 | [2] |  | 372,600,000 | [2]
Stated Interest Rate | 6.25% |  |  | 6.25% |  |  |  |
Debt Instrument, Unamortized Discount | 100,000 |  |  | 100,000 |  |  |  |
Debt Maturity Date |  |  |  | Nov. 15, 2014 |  |  |  |
2.25% Senior Notes due 2017 |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |
Effective Interest Rate | 2.30% |  |  | 2.30% |  |  |  |
Book Value | 299,400,000 |  |  | 299,400,000 |  |  | 299,300,000 |
Fair Value | 296,700,000 | [2] |  | 296,700,000 | [2] |  | 297,800,000 | [2]
Stated Interest Rate | 2.25% |  |  | 2.25% |  |  |  |
Debt Instrument, Unamortized Discount | 600,000 |  |  | 600,000 |  |  |  |
Debt Maturity Date |  |  |  | Nov. 15, 2017 |  |  |  |
4.00% Senior Notes due 2022 |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |
Effective Interest Rate | 4.13% |  |  | 4.13% |  |  |  |
Book Value | 247,300,000 |  |  | 247,300,000 |  |  | 247,100,000 |
Fair Value | 242,000,000 | [2] |  | 242,000,000 | [2] |  | 258,700,000 | [2]
Stated Interest Rate | 4.00% |  |  | 4.00% |  |  |  |
Debt Instrument, Unamortized Discount | 2,700,000 |  |  | 2,700,000 |  |  |  |
Debt Maturity Date |  |  |  | Mar. 15, 2022 |  |  |  |
3.75% Senior Notes due 2023 |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |
Effective Interest Rate | 4.32% |  |  | 4.32% |  |  |  |
Book Value | 498,600,000 |  |  | 498,600,000 |  |  | 498,500,000 |
Fair Value | 469,300,000 | [2] |  | 469,300,000 | [2] |  | 499,700,000 | [2]
Stated Interest Rate | 3.75% |  |  | 3.75% |  |  |  |
Debt Instrument, Unamortized Discount | 1,400,000 |  |  | 1,400,000 |  |  |  |
Debt Maturity Date |  |  |  | Feb. 15, 2013 |  |  |  |
10.00% Senior Unsecured Notes due 2017 |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |
Book Value | 0 |  |  | 0 |  |  | 591,900,000 |
Fair Value | 0 | [2] |  | 0 | [2] |  | 660,800,000 | [2]
Stated Interest Rate | 10.00% |  |  | 10.00% |  |  |  |
Debt Instrument, Unamortized Discount | 0 |  |  | 0 |  |  |  |
Total cash paid to redeem debt |  |  |  | 630,000,000 |  |  |  |
Redemption Date of 10.00% Notes |  |  |  | Jul. 15, 2013 |  |  |  |
Loss on early extinguishment of debt |  |  |  | (45,200,000) |  |  |  |
Write-off of Unamortized Discount |  |  |  | 7,300,000 |  |  |  |
Write-off of Deferred Debt Issuance Cost |  |  |  | 7,900,000 |  |  |  |
Early Redemption Debt Premium of 10.00% Notes |  |  |  | 30,000,000 |  |  |  |
Extinguishment of Debt, Principal Amount |  |  |  | 600,000,000 |  |  |  |
Debt Maturity Date |  |  |  | Jul. 15, 2017 |  |  |  |
4.75% Notes |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |
Book Value | 0 |  |  | 0 |  |  | 200,500,000 |
Fair Value | 0 | [2] |  | 0 | [2] |  | 202,800,000 | [2]
Stated Interest Rate | 4.75% |  |  | 4.75% |  |  |  |
Extinguishment of Debt, Principal Amount |  |  |  | 200,000,000 |  |  |  |
Debt Maturity Date |  |  |  | Mar. 15, 2023 |  |  |  |
4.75% Notes, Amount Retired for Cash | 199,997,000 |  |  | 199,997,000 |  |  |  |
Conversion Rate |  |  |  | 84.3402 |  |  |  |
Conversion of convertible notes to common stock, shares |  |  |  | 16,900,000 |  |  |  |
Other notes payable and capitalized leases |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |
Book Value | 86,300,000 |  |  | 86,300,000 |  |  | 87,300,000 |
Fair Value | $ 85,800,000 | [2] |  | $ 85,800,000 | [2] |  | $ 90,800,000 | [2]
[1] | We included our 4.75% Convertible Senior Notes due 2023 (the “4.75% Notes”) in the current portion of long-term debt on our December 31, 2012 Consolidated Balance Sheet because holders of the 4.75% Notes had an option to require us to repurchase their Notes for cash, stock or a combination, at our election, at par on March 15, 2013. The 4.75% Notes were retired in the first quarter of 2013.
[2] | See Note 11 for information on the fair value measurement of our long-term debt.

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- Definition Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or the normal operating cycle, if longer. + 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 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 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 + Details
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- Definition Ratio applied to the conversion of debt instrument into equity with equity shares divided by debt principal amount. + References Reference 1: 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21521-112644 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21506-112644 Reference 5: 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)(5)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Conversion Rate -URI http://asc.fasb.org/extlink&oid=6509012 + Details
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- Definition Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium. + 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 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 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + 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 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 3: 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 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20, 22 -Article 5 Reference 6: 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 + Details
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- Definition Amount of long-term debt, after unamortized discount or premium, scheduled to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + 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 210.5-02.19,20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19 -Article 5 + Details
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- Definition The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. + References No definition available. + Details
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- Definition Carrying amount of long-term debt, net of unamortized discount or premium, excluding amounts to be repaid within one year or the normal operating cycle, if longer (current maturities). Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + 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) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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