Other, Net (Tables)
 9 Months Ended
Sep. 30, 2015
Other Income and Expenses [Abstract]  
Schedule Of Other, Net
 
Three Months Ended
September 30,
 
Nine Months Ended September 30,
(in millions)
2015
 
2014
 
2015
 
2014
 
 
 
Predecessor
 
 
 
Predecessor
AFUDC Equity
$
6.6

 
$
3.9

 
$
15.0

 
$
8.2

Miscellaneous
2.8

 
(0.3
)
 
3.6

 
(0.2
)
Total Other, net
$
9.4

 
$
3.6

 
$
18.6

 
$
8.0