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Equity and Distributions, Summary of Changes in Outstanding Units (Details) | 3 Months Ended
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Mar. 31, 2013
Common Units (Unrestricted) [Member] |
Summary of changes in outstanding units [Roll Forward] |
Number of units outstanding at December 31, 2012 | 894,919,851
Common units issued in connection with underwritten offering (in units) | 9,200,000
Common units issued in connection with DRIP and EUPP (in units) | 1,275,229
Common units issued in connection with the vesting of unit options (in units) | 168,628
Common units issued in connection with the vesting of restricted common unit awards (in units) | 939,226
Restricted common units awards issued (in units) | 0
Forfeiture of restricted common unit awards (in units) | 0
Acquisition and cancellation of treasury units in connection with the vesting of equity-based awards (in units) | (315,783)
Number of units outstanding at March 31, 2013 | 906,187,151
Restricted Common Units [Member] |
Summary of changes in outstanding units [Roll Forward] |
Number of units outstanding at December 31, 2012 | 3,893,486
Common units issued in connection with underwritten offering (in units) | 0
Common units issued in connection with DRIP and EUPP (in units) | 0
Common units issued in connection with the vesting of unit options (in units) | 0
Common units issued in connection with the vesting of restricted common unit awards (in units) | (939,226)
Restricted common units awards issued (in units) | 1,723,576
Forfeiture of restricted common unit awards (in units) | (59,460)
Acquisition and cancellation of treasury units in connection with the vesting of equity-based awards (in units) | 0
Number of units outstanding at March 31, 2013 | 4,618,376
Common units [Member] |
Summary of changes in outstanding units [Roll Forward] |
Number of units outstanding at December 31, 2012 | 898,813,337
Common units issued in connection with underwritten offering (in units) | 9,200,000
Common units issued in connection with DRIP and EUPP (in units) | 1,275,229
Common units issued in connection with the vesting of unit options (in units) | 168,628
Common units issued in connection with the vesting of restricted common unit awards (in units) | 0
Restricted common units awards issued (in units) | 1,723,576
Forfeiture of restricted common unit awards (in units) | (59,460)
Acquisition and cancellation of treasury units in connection with the vesting of equity-based awards (in units) | (315,783)
Number of units outstanding at March 31, 2013 | 910,805,527

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- Definition The number of each class of partnership units outstanding at the balance sheet date. Units represent shares of ownership of the general, limited, and preferred partners. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Practice Bulletin (PB) -Number 14 -Paragraph 15 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 16 -Subparagraph a, b -Article 6 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-04.16(a)) -URI http://asc.fasb.org/extlink&oid=6488278&loc=d3e603758-122996 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-04.16(b)) -URI http://asc.fasb.org/extlink&oid=6488278&loc=d3e603758-122996 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 5 -Subparagraph (SAB TOPIC 4.F) -URI http://asc.fasb.org/extlink&oid=6959260&loc=d3e187171-122770 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 87-21 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The number of units issued due to unit-based compensation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 272 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Practice Bulletin (PB) -Number 14 -Paragraph 15 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=6959260&loc=d3e187085-122770 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 87-21 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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