ORGANIZATION - Ownership Interests in Natural Gas Pipeline Systems (Details)	9 Months Ended
Sep. 30, 2018 LimitedPartnership
ORGANIZATION
Number of intermediate limited partnerships through which pipeline assets are owned	3

Represents the number of intermediate limited partnerships through which the entity owns its pipeline assets.

No definition available.

Name:	tcp_NumberOfIntermediateLimitedPartnershipsThroughWhichPipelineAssetsOwned
Namespace Prefix:	tcp_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration