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Debt and Credit Arrangements (Tables) | 9 Months Ended
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Sep. 30, 2013
Debt and Credit Arrangements [Abstract] |
Summary of Carrying Amounts and Fair Values of Long-term Debt | A summary of the carrying amounts and fair values of our long-term debt is listed below.
| Effective Interest Rate |  | September 30, 2013 |  | December 31, 2012
Book Value |  | Fair Value 1 |  | Book Value |  | Fair Value 1
6.25% Senior Unsecured Notes due 2014 (less unamortized discount of $0.1) | 6.29% |  | $ | 351.6 |  |  | $ | 369.4 |  |  | $ | 352.8 |  |  | $ | 372.6 |
2.25% Senior Notes due 2017 (less unamortized discount of $0.6) | 2.30% |  | 299.4 |  |  | 296.7 |  |  | 299.3 |  |  | 297.8 |
4.00% Senior Notes due 2022 (less unamortized discount of $2.7) | 4.13% |  | 247.3 |  |  | 242.0 |  |  | 247.1 |  |  | 258.7 |
3.75% Senior Notes due 2023 (less unamortized discount of $1.4) | 4.32% |  | 498.6 |  |  | 469.3 |  |  | 498.5 |  |  | 499.7 |
10.00% Senior Unsecured Notes due 2017 |  |  | 0.0 |  |  | 0.0 |  |  | 591.9 |  |  | 660.8 |
4.75% Convertible Senior Notes due 2023 |  |  | 0.0 |  |  | 0.0 |  |  | 200.5 |  |  | 202.8 |
Other notes payable and capitalized leases |  |  | 86.3 |  |  | 85.8 |  |  | 87.3 |  |  | 90.8 |
Total long-term debt |  |  | 1,483.2 |  |  |  |  | 2,277.4 |  |  |
Less: current portion 2 |  |  | 2.2 |  |  |  |  | 216.6 |  |  |
Long-term debt, excluding current portion |  |  | $ | 1,481.0 |  |  |  |  | $ | 2,060.8 |  |  |
1 | See Note 11 for information on the fair value measurement of our long-term debt.
2 | 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.

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- Definition Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(e),(f)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -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 Reference 3: 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 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399 Reference 5: 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 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 7: 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 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21506-112644 Reference 9: 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 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21538-112644 Reference 11: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823 + Details
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