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Earnings Per Unit (Tables)
 12 Months Ended
Dec. 31, 2016
Earnings Per Unit [Abstract]  
Earnings per Unit
The following table sets forth the computation of basic and diluted earnings per limited partner unit for the years ended December 31, 2016, 2015 and 2014 (in millions, except unit and per unit data):
 
Year Ended December 31,
 
2016
 
2015
 
2014
 
 
Numerator for basic and diluted earnings per limited partner unit:
 
 
 
 
 
Net loss
$
(328.6
)
 
$
(139.4
)
 
$
(112.2
)
Less:
 
 
 
 
 
General partner’s interest in net loss
(6.6
)
 
(2.8
)
 
(2.2
)
General partner’s incentive distribution rights
—

 
16.8

 
15.4

Net loss available to limited partners
$
(322.0
)
 
$
(153.4
)
 
$
(125.4
)
Denominator for basic and diluted earnings per limited partner unit:
 
 
 
 
 
Basic and diluted weighted average limited partner units outstanding (1)
77,043,935

 
74,896,096

 
69,671,827

Limited partners’ interest basic and diluted net loss per unit
$
(4.18
)
 
$
(2.05
)
 
$
(1.80
)
 
(1) 
Total diluted weighted average limited partner units outstanding excludes 0.5 million, 0.4 million and 0.2 million potentially dilutive phantom units for the years ended December 31, 2016, 2015 and 2014, respectively.