CHANGE IN OPERATING WORKING CAPITAL (Details 2) (GTN, Former parent, TransCanada subsidiaries, Transaction between entities under common control, Accounts payable to affiliates, USD $) In Millions, unless otherwise specified	Dec. 31, 2013
GTN | Former parent, TransCanada subsidiaries | Transaction between entities under common control | Accounts payable to affiliates
Acquisition
Accrued additional consideration for Carty Lateral	$ 25