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Earnings Per Unit (Tables)
 6 Months Ended
Jun. 30, 2020
Earnings Per Unit [Abstract]  
Summary of Computation of Basic and Diluted Earnings Per Limited Partner Unit
The following table sets forth the computation of basic and diluted earnings per limited partner unit (in millions, except unit and per unit data):
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2020
 
2019
 
2020
 
2019
Numerator for basic and diluted earnings per limited partner unit:
 
 
 
 
 
 
 
Net income (loss)
$
3.6

 
$
(16.8
)
 
$
(10.8
)
 
$
(0.4
)
Less:
 
 
 
 
 
 
 
General partner’s interest in net income (loss)
0.1

 
(0.3
)
 
(0.2
)
 
—

Net income (loss) available to limited partners
$
3.5

 
$
(16.5
)
 
$
(10.6
)
 
$
(0.4
)
 
 
 
 
 
 
 
 
Denominator for earnings per limited partner unit:
 
 
 
 
 
 
 
Basic weighted average limited partner units outstanding
78,664,183

 
78,212,837

 
78,532,405

 
78,111,857

Effect of dilutive securities:
 
 
 
 
 
 
 
Incremental Units
14,787

 
—

 
—

 
—

Diluted weighted average limited partner units outstanding (1)
78,678,970

 
78,212,837

 
78,532,405

 
78,111,857

Limited partners’ interest basic net income (loss) per unit:
 
 
 
 
 
 
 
Limited partners’ interest
$
0.05

 
$
(0.21
)
 
$
(0.13
)
 
$
—

Limited partners’ interest diluted net income (loss) per unit:
 
 
 
 
 
 
 
Limited partners' interest
$
0.05

 
$
(0.21
)
 
$
(0.13
)
 
$
—


 
(1) 
Total diluted weighted average limited partner units outstanding excludes a de-minimis amount of un-vested phantom units for the six months ended June 30, 2020 and excludes 0.1 million for the three and six months ended June 30, 2019.