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Earnings Per Unit (Tables) | 12 Months Ended
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Dec. 31, 2012
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 Year Ended December 31, |
|  | 2012 |  |  | 2011 |  |  | 2010 |
BASIC EARNINGS PER UNIT |  |  |  |  |  |  |  |  |
Numerator: |  |  |  |  |  |  |  |  |
Net income attributable to limited partners |  | $ | 2,419.9 |  |  | $ | 2,046.9 |  |  | $ | 320.8 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |
Weighted-average number of distribution-bearing |  |  |  |  |  |  |  |  |  |  |  |
common units outstanding |  |  | 861.8 |  |  |  | 824.6 |  |  |  | 274.5 |
Basic earnings per unit: |  |  |  |  |  |  |  |  |  |  |  |
Net income attributable to limited partners |  | $ | 2.81 |  |  | $ | 2.48 |  |  | $ | 1.17 |
DILUTED EARNINGS PER UNIT |  |  |  |  |  |  |  |  |  |  |  |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |
Net income attributable to limited partners |  | $ | 2,419.9 |  |  | $ | 2,046.9 |  |  | $ | 320.8 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |
Weighted-average number of units outstanding: |  |  |  |  |  |  |  |  |  |  |  |
Distribution-bearing common units |  |  | 861.8 |  |  |  | 824.6 |  |  |  | 274.5 |
Class B units |  |  | 4.5 |  |  |  | 4.5 |  |  |  | 0.5 |
Designated Units |  |  | 25.5 |  |  |  | 29.5 |  |  |  | 3.4 |
Incremental option units |  |  | 1.4 |  |  |  | 1.3 |  |  |  | 0.1 |
Total |  |  | 893.2 |  |  |  | 859.9 |  |  |  | 278.5 |
Diluted earnings per unit: |  |  |  |  |  |  |  |  |  |  |  |
Net income attributable to limited partners |  | $ | 2.71 |  |  | $ | 2.38 |  |  | $ | 1.15 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations. + References No definition available. + Details
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