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Earnings Per Unit (Tables) | 12 Months Ended
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Dec. 31, 2015
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, |
|  | 2015 |  |  | 2014 |  |  | 2013 |
BASIC EARNINGS PER UNIT |  |  |  |  |  |  |  |  |
Net income attributable to limited partners |  | $ | 2,521.2 |  |  | $ | 2,787.4 |  |  | $ | 2,596.9 |
Undistributed earnings allocated and cash payments on phantom unit awards (1) |  |  | (8.7 | ) |  |  | (5.2 | ) |  |  | -- |
Net income available to common unitholders |  | $ | 2,512.5 |  |  | $ | 2,782.2 |  |  | $ | 2,596.9 |
Basic weighted-average number of common units outstanding |  |  | 1,966.6 |  |  |  | 1,848.7 |  |  |  | 1,788.0 |
Basic earnings per unit |  | $ | 1.28 |  |  | $ | 1.51 |  |  | $ | 1.45 |
DILUTED EARNINGS PER UNIT |  |  |  |  |  |  |  |  |  |  |  |
Net income attributable to limited partners |  | $ | 2,521.2 |  |  | $ | 2,787.4 |  |  | $ | 2,596.9 |
Diluted weighted-average number of units outstanding: |  |  |  |  |  |  |  |  |  |  |  |
Distribution-bearing common units |  |  | 1,966.6 |  |  |  | 1,848.7 |  |  |  | 1,788.0 |
Designated Units |  |  | 26.5 |  |  |  | 42.7 |  |  |  | 46.8 |
Class B units (2) |  |  | -- |  |  |  | -- |  |  |  | 5.4 |
Phantom units (1) |  |  | 5.4 |  |  |  | 2.9 |  |  |  | -- |
Incremental option units |  |  | 0.1 |  |  |  | 0.9 |  |  |  | 2.4 |
Total |  |  | 1,998.6 |  |  |  | 1,895.2 |  |  |  | 1,842.6 |
Diluted earnings per unit |  | $ | 1.26 |  |  | $ | 1.47 |  |  | $ | 1.41 |
(1) Each phantom unit award includes a DER, which entitles the recipient to receive cash payments equal to the product of the number of phantom unit awards and the cash distribution per unit paid to our common unitholders. Cash payments made in connection with DERs are nonforfeitable. As a result, the phantom units are considered participating securities for purposes of computing basic earnings per unit. Phantom unit awards were first issued in February 2014. (2) The Class B units automatically converted into an equal number of distribution-bearing common units in August 2013. |

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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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