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Earnings Per Unit (Tables) | 9 Months Ended
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Sep. 30, 2013
Earnings Per Unit [Abstract] |
Basic and Diluted Earnings Per Unit |
|  | For the Three Months Ended September 30 |  |  | For the Nine Months Ended September 30, |
|  | 2013 |  |  | 2012 |  |  | 2013 |  |  | 2012 |
BASIC EARNINGS PER UNIT |  |  |  |  |  |  |  |  |  |  |  |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |
Net income attributable to limited partners |  | $ | 592.0 |  |  | $ | 586.8 |  |  | $ | 1,898.0 |  |  | $ | 1,804.4 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted-average number of distribution-bearing common units outstanding |  |  | 896.3 |  |  |  | 859.3 |  |  |  | 889.1 |  |  |  | 857.9 |
Basic earnings per unit: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income attributable to limited partners |  | $ | 0.66 |  |  | $ | 0.68 |  |  | $ | 2.13 |  |  | $ | 2.10 |
DILUTED EARNINGS PER UNIT |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income attributable to limited partners |  | $ | 592.0 |  |  | $ | 586.8 |  |  | $ | 1,898.0 |  |  | $ | 1,804.4 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted-average number of units outstanding: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Distribution-bearing common units |  |  | 896.3 |  |  |  | 859.3 |  |  |  | 889.1 |  |  |  | 857.9 |
Class B units |  |  | 1.9 |  |  |  | 4.5 |  |  |  | 3.6 |  |  |  | 4.5 |
Designated Units |  |  | 23.7 |  |  |  | 26.1 |  |  |  | 23.7 |  |  |  | 26.1 |
Incremental option units |  |  | 1.1 |  |  |  | 1.5 |  |  |  | 1.2 |  |  |  | 1.5 |
Total |  |  | 923.0 |  |  |  | 891.4 |  |  |  | 917.6 |  |  |  | 890.0 |
Diluted earnings per unit: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income attributable to limited partners |  | $ | 0.64 |  |  | $ | 0.66 |  |  | $ | 2.07 |  |  | $ | 2.03 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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