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Investment in Unconsolidated Affiliates (Tables)
 2 Months Ended
Jun. 30, 2013
Related Party Transactions [Abstract]  
Schedule of Related Party Transactions [Table Text Block]
Related Party Transactions with Enable Midstream Partners
 
Three Months Ended
Five Months Ended
 
September 30,
September 30,
(In millions)
2013
2013
Operating Revenues:
 
 
Electricity to power electric compression assets
$
3.9

$
5.2

Cost of Goods Sold:
 
 
Natural gas transportation services
$
8.7

$
14.5

Natural gas storage services
3.1

5.4

Natural gas purchases (A)
9.4

11.9

(A)
At September 30, 2013, there was $1.4 million of natural gas purchases recorded for these activities.