Asset Retirement Obligations (Details Narrative) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Asset Retirement Obligations
Undiscounted amount required to settle ARO	$ 8.2	$ 8.2
Inflation interest rate	2.50%	2.50%
Interest free rate	3.01%	1.49%

Undiscounted amount required to settlet asset retirement obligation.

No definition available.

Name:	TRLEF_UndiscountedAmountRequiredToSettleAssetRetirementObligation
Namespace Prefix:	TRLEF_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant