Transactions with Major Customers and Affiliates (Tables)

12 Months Ended

Dec. 31, 2014

Transactions with Major Customers and Affiliates [Abstract]

Schedule of revenue by major customers

Operating revenues received from two of our major customers in 2014, 2013 and 2012 are as follows (in millions):

	2014		2013		2012
Public Service Enterprise Group	$	115.3	$	130.7	$	127.4
National Grid	91.2		88.5		93.5