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Earnings Per Unit (Tables) | 12 Months Ended
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Dec. 31, 2013
Earnings Per Unit [Abstract] |
Basic and Diluted Earnings Per Unit | The following table presents our calculation of basic and diluted earnings per unit for the periods indicated:
|  | For the Year Ended December 31, |
|  | 2013 |  |  | 2012 |  |  | 2011 |
BASIC EARNINGS PER UNIT |  |  |  |  |  |  |  |  |
Numerator: |  |  |  |  |  |  |  |  |
Net income attributable to limited partners |  | $ | 2,596.9 |  |  | $ | 2,419.9 |  |  | $ | 2,046.9 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |
Weighted-average number of distribution-bearing common units outstanding |  |  | 894.0 |  |  |  | 861.8 |  |  |  | 824.6 |
Basic earnings per unit: |  |  |  |  |  |  |  |  |  |  |  |
Net income attributable to limited partners |  | $ | 2.90 |  |  | $ | 2.81 |  |  | $ | 2.48 |
DILUTED EARNINGS PER UNIT |  |  |  |  |  |  |  |  |  |  |  |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |
Net income attributable to limited partners |  | $ | 2,596.9 |  |  | $ | 2,419.9 |  |  | $ | 2,046.9 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |
Weighted-average number of units outstanding: |  |  |  |  |  |  |  |  |  |  |  |
Distribution-bearing common units |  |  | 894.0 |  |  |  | 861.8 |  |  |  | 824.6 |
Class B units |  |  | 2.7 |  |  |  | 4.5 |  |  |  | 4.5 |
Designated Units |  |  | 23.4 |  |  |  | 25.5 |  |  |  | 29.5 |
Incremental option units |  |  | 1.2 |  |  |  | 1.4 |  |  |  | 1.3 |
Total |  |  | 921.3 |  |  |  | 893.2 |  |  |  | 859.9 |
Diluted earnings per unit: |  |  |  |  |  |  |  |  |  |  |  |
Net income attributable to limited partners |  | $ | 2.82 |  |  | $ | 2.71 |  |  | $ | 2.38 |

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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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