NET INCOME PER COMMON UNIT (Details 3) - 3 months ended Jun. 30, 2015 - GTN - USD ($)	Total
Partners' Equity
Total distributable cash flows	$ 29,000,000
Class B units \| TransCanada \| Distributions
Partners' Equity
Initial effective percentage applied to GTN's distributions above threshold	30.00%
Prorated threshold of GTN's distributions for payment to Class B units	$ 15,000,000

Represents, for rights of the holder of capital units to receive partners capital account distributions, the initial percentage (100%) to be applied during a specified period to 30 percent of subsidiary distributions in excess of a specified amount, as defined.

No definition available.

Name:	tclp_CapitalUnitsRightsOfHolderToReceivePartnersCapitalAccountDistributionsInitialEffectivePercentageAppliedToSubsidiaryDistributionsInExcessOfSpecifiedAmount
Namespace Prefix:	tclp_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration