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Commitments | 12 Months Ended
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Dec. 31, 2012
COMMITMENTS | 13. COMMITMENTS LEASES—The Company and its subsidiaries enter into long-term non-cancelable lease arrangements which, f or accounting purposes, are classified as either o perating lease or capital lease. Operating leases primarily include certain transmission lines, office rental and site leases. Operating lease r ental expense for the years ended December 31, 2012, 2011 and 2010 was $58 million, $63 million and $56 million, respectively. Capital lease s primarily include transmission lines at our subsidiaries in Brazil, vehicles, and office and other operating equipment. C apital leases are recognized in Property, Plant and Equipment within “Electric generation and distribution assets.” The gross value of the capital lease assets as of December 31, 2012 and 2011 was $94 million and $95 million, respectively. The table below sets forth the future minimum lease payments under operating and capital leases together with the present value of the net minimum lease payments under capital leases as of December 31, 2012 for 2013 through 2017 and thereafter:
|  | Future Commitments for
December 31, |  | Capital Leases |  | Operating Leases
|  |  | (in millions)
2013 | . |  | $ | 12 |  | $ | 53
2014 | . |  |  | 12 |  |  | 51
2015 | . |  |  | 11 |  |  | 48
2016 | . |  |  | 11 |  |  | 47
2017 | . |  |  | 11 |  |  | 47
Thereafter |  |  | 160 |  |  | 517
Total |  |  | 217 |  | $ | 763
Less: Imputed interest |  |  | 138 |  |  |
Present value of total minimum lease payments |  | $ | 79 |  |  |
CONTRACTS—T he Company's operating subsidiaries enter into long-term contracts for construction projects, maintenance and service, transmission of electricity, operation s services and purchase of e lectricity and fuel. In general, these contract s are subject to variable quantities or prices and are terminable in limited circumstances only. Electricity purchase contracts primarily include energy auction agreements at our Brazil subsidiaries with extended terms from 201 3 through 2028. The table below sets forth the future minimum commitments under these contracts as of December 31, 2012 for 2013 through 2017 and thereafter. Actual purchases under these contracts for the years ended December 31, 2012, 2011 and 2010 are also presented:
|  | Electricity Purchase Contracts |  | Fuel Purchase Contracts |  | Other Purchase Contracts
Actual purchases during the year ended December 31, |  | (in millions)
2010 | . |  | $ | 2,422 |  | $ | 1,686 |  | $ | 1,652
2011 | . |  |  | 2,463 |  |  | 1,577 |  |  | 1,767
2012 | . |  |  | 2,819 |  |  | 1,860 |  |  | 1,701
Future commitments for the year ending December 31, |  |  |  |  |  |  |  |  |
2013 | . |  | $ | 2,599 |  | $ | 1,555 |  | $ | 1,976
2014 | . |  |  | 3,008 |  |  | 998 |  |  | 1,743
2015 | . |  |  | 2,952 |  |  | 555 |  |  | 1,629
2016 | . |  |  | 2,971 |  |  | 428 |  |  | 1,202
2017 | . |  |  | 2,351 |  |  | 416 |  |  | 1,093
Thereafter |  |  | 25,001 |  |  | 4,618 |  |  | 11,153
Total |  | $ | 38,882 |  | $ | 8,570 |  | $ | 18,796

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- Definition The entire disclosure for significant arrangements with third parties, which includes operating lease arrangements and arrangements in which the entity has agreed to expend funds to procure goods or services, or has agreed to commit resources to supply goods or services, and operating lease arrangements. Descriptions may include identification of the specific goods and services, period of time covered, minimum quantities and amounts, and cancellation rights. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 17 -Article 9 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 210.9-03.17) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 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 210.5-02.25) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 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.(a)(19)) -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 02 -Paragraph 25 -Article 5 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 19 -Article 7 + Details
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