Net Income Per Limited Partner Unit (Tables)
 3 Months Ended
Mar. 31, 2015
Net Income Per Limited Partner Unit [Abstract]  
Schedule of Undistributed Net Income
 
Three Months Ended
March 31,
(in millions)
2015
Net income attributable to limited partners subsequent to IPO

$
13.3

Less:
 
Limited partners' distribution declared on common units
—

Limited partners' distribution declared on subordinated units
—

Distribution declared on incentive distribution rights
—

Net income subsequent to the IPO in excess of distribution
$
13.3
Schedule Of Net Income Per Limited Partner Unit
Three Months Ended March 31, 2015                                                                           (in millions, except per unit data)
Limited Partners' Common Units
 
Limited Partners' Subordinated Units
 
Incentive Distribution Rights
 
Total
Net income attributable to limited partners subsequent to IPO
 
 
 
 
 
 
 
Distribution declared
$
—

 
$
—

 
$
—

 
$
—

Net income subsequent to the IPO in excess of distribution
7.1

 
6.2

 
—

 
13.3

Net income attributable to limited partners subsequent to IPO

$
7.1

 
$
6.2

 
$
—

 
$
13.3

 
 
 
 
 
 
 
 
Weighted average limited partner units outstanding

 
 
 
 
 
 
 
Basic and diluted
53.8

 
46.8

 
—

 
100.6

Net income attributable to partners' ownership interest subsequent to IPO per limited partner unit

 
 
 
 
 
 
 
Basic and diluted
$
0.13

 
$
0.13

 
$
—

 
$
0.13