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Debt | 12 Months Ended
--- | ---
Dec. 31, 2013
Debt Disclosure [Abstract] |
Debt | 9. Debt Debt consists of (in millions):
|  | December 31, |
|  | 2013 |  |  | 2012 |
Senior Notes, interest at 6.125% payable semiannually, principal due on August 15, 2015 |  |  | 151 |  |  |  | 151 |
Senior Notes, interest at 1.35% payable semiannually, principal due on December 1, 2017 |  |  | 500 |  |  |  | 500 |
Senior Notes, interest at 2.6% payable semiannually, principal due on December 1, 2022 |  |  | 1,396 |  |  |  | 1,395 |
Senior Notes, interest at 3.95% payable semiannually, principal due on December 1, 2042 |  |  | 1,096 |  |  |  | 1,096 |
Other |  |  | 7 |  |  |  | 7 |
Total debt |  |  | 3,150 |  |  |  | 3,149 |
Less current portion |  |  | 1 |  |  |  | 1 |
Long-term debt |  | $ | 3,149 |  |  | $ | 3,148 |
Principal payments of debt for years subsequent to 2013 are as follows (in millions):
2014 |  | $ | 1 |
2015 |  |  | 153 |
2016 |  |  | — |
2017 |  |  | 500 |
2018 |  |  | — |
Thereafter |  |  | 2,496 |
|  | $ | 3,150 |
The Company has a $3.5 billion, five-year unsecured revolving credit facility which expires September 28, 2018, following a one year extension executed in September 2013. In August 2013, the Company initiated a commercial paper program. Borrowings under the commercial paper program are classified as long-term as the program is supported by the $3.5 billion, five-year revolving credit facility. At December 31, 2013, there were no commercial paper borrowings however, there were $947 million in outstanding letters of credit issued under the credit facility, resulting in $2,553 million of funds available under this revolving credit facility. Interest under this multicurrency facility is based upon LIBOR, NIBOR or EURIBOR plus 0.875% subject to a ratings-based grid, or the prime rate. The credit facility contains a financial covenant regarding maximum debt to capitalization and the Company was in compliance at December 31, 2013. The Company also had $3,056 million of additional outstanding letters of credit at December 31, 2013, primarily in Norway, that are under various bilateral committed letter of credit facilities. Other letters of credit are issued as bid bonds, advanced payment bonds and performance bonds. The fair value of the Company’s Senior Notes are estimated using Level 2 inputs in the fair value hierarchy and is based on quoted prices for those or similar instruments. At December 31, 2013 and 2012, the fair value of the Company’s unsecured Senior Notes approximated $2,896 million and $3,190 million, respectively. At December 31, 2013 and 2012, the carrying value of the Company’s unsecured Senior Notes was $3,143 million and $3,142 million, respectively.

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- Definition The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants. + 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 19, 20, 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 210.5-02.19,20,22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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