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Debt (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2014
Debt |
Long-term debt |
|  | As of December 31, |
|  | 2014 |  | 2013 |
|  | (In thousands) |
2.35% senior notes due September 2016 |  | $ | 349,887 |  | $ | 349,820 |
6.15% senior notes due February 2018 |  |  | 930,693 |  |  | 969,928 |
9.25% senior notes due January 2019 |  |  | 339,607 |  |  | 339,607 |
5.00% senior notes due September 2020 |  |  | 698,253 |  |  | 697,947 |
4.625% senior notes due September 2021 |  |  | 698,388 |  |  | 698,148 |
5.10% senior notes due September 2023 |  |  | 348,893 |  |  | 348,765 |
Revolving credit facility |  |  | 450,000 |  |  | 170,000 |
Commercial paper |  |  | 533,119 |  |  | 329,844 |
Other |  |  | 6,209 |  |  | 10,243 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
|  | $ | 4,355,049 |  | $ | 3,914,302 |
Less: current portion |  |  | 6,190 |  |  | 10,185 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
|  | $ | 4,348,859 |  | $ | 3,904,117 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Maturity of primary debt |
|  | Paid at Maturity |
|  | (In thousands) |
2015 |  | $ | — |
2016 |  |  | 350,000 | (1)
2017 |  |  | 983,119 | (2)
2018 |  |  | 934,372 | (3)
2019 |  |  | 339,607 | (4)
Thereafter |  |  | 1,750,000 | (5)
​ | ​ | ​ | ​ | ​
|  | $ | 4,357,098 |
​ | ​ | ​ | ​ | ​
(1) | Represents our 2.35% senior notes due September 2016.
(2) | Represents amounts drawn on our revolving credit facility and commercial paper, which expires November 2017.
(3) | Represents our 6.15% senior notes due February 2018.
(4) | Represents our 9.25% senior notes due January 2019.
(5) | Represents our 5.0% senior notes due September 2020, 4.625% senior notes due September 2021 and 5.10% senior notes due September 2023.
Short-Term Borrowings |
|  | December 31, 2014 |
|  | (In thousands) |
Credit available |  | $ | 650,204 |
Less: Letters of credit outstanding, inclusive of financial and performance guarantees |  |  | 326,650 |
​ | ​ | ​ | ​ | ​
Remaining availability |  | $ | 323,554 |
​ | ​ | ​ | ​ | ​

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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 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6584090&loc=d3e28878-108400 Reference 2: 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 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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- Definition Tabular disclosure of short-term or long-term contractual arrangements with lenders, including letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. + 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 SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph f -Article 4 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 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition Tabular disclosure of the combined aggregate amount of maturities and sinking fund requirements for all long-term borrowings for each of the five years following the date of the latest balance sheet date presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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