Property, Plant And Equipment (Tables)
12 Months Ended
Dec. 31, 2015
Property, Plant and Equipment [Abstract]  
Schedule Of Property, Plant And Equipment
At December 31, (in millions)
2015
 
2014
 
 
 
Predecessor
Property, plant and equipment
 
 
 
Pipeline and other transmission assets
$
6,120.0

 
$
5,328.2

Storage facilities
1,370.1

 
1,326.5

Gas stored base gas
299.5

 
299.5

Gathering and processing facilities
370.2

 
263.3

Construction work in process
463.5

 
454.2

General plant, software, and other assets
307.6

 
259.9

Property, plant and equipment
8,930.9

 
7,931.6

Accumulated Depreciation and Amortization
(2,960.1
)
 
(2,971.4
)
Net Property, plant and equipment
$
5,970.8

 
$
4,960.2

Schedule of Depreciation Rates
 
Year Ended December 31,
 
2015
 
2014
 
2013
 
 
 
Predecessor
 
Predecessor
Depreciation rates
 
 
 
 
 
Pipeline and other transmission assets
1.00% - 1.73%
 
1.00% - 2.55%
 
1.50 % - 2.55%
Storage facilities
2.19% - 3.00%
 
2.19% - 3.30%
 
2.19% - 3.50%
Gathering and processing facilities
1.67% - 2.50%
 
1.67% - 2.50%
 
1.67 % - 2.50%
General plant, software, and other assets
1.00% - 10.00%
 
1.00% - 10.00%
 
1.00% - 10.00%