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PREFERRED SHARES	12 Months Ended
PREFERRED SHARES	Dec. 31, 2015
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
PREFERRED SHARES	PREFERRED SHARES In March 2014, TCPL redeemed all of the 4 million outstanding Series Y preferred shares at a redemption price of $50 per share for a gross payment of $200 million. In October 2013, TCPL redeemed all of the 4 million outstanding Series U preferred shares at a redemption price of $50 per share for a gross payment of $200 million.