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Variable Interest Entities - Narrative (Details) $ / shares in Units, $ in Millions					1 Months Ended			6 Months Ended
	Jul. 28, 2025 $ / shares shares	May 12, 2025 USD ($) area $ / a acre ft	Jun. 03, 2024	Sep. 18, 2022	Sep. 30, 2025 $ / shares shares	Oct. 31, 2024	Jun. 30, 2024 USD ($) $ / shares shares	Dec. 31, 2025 USD ($)	Jun. 30, 2025 USD ($)	Dec. 31, 2024 USD ($)	Mar. 21, 2024	Mar. 04, 2024	Nov. 09, 2022
Variable Interest Entity [Line Items]
Commitments and contingencies (Note 12)
Capital raise (in shares) \| shares	50,000				50,000		312,500
Issue price (in dollars per share) \| $ / shares	$ 19.75				$ 19.75		$ 24.00
Asset sale agreement, number of areas sold \| area		2
Daly Waters Energy, LP (“DWE”) \| Beetaloo Basin
Variable Interest Entity [Line Items]
Equity method investment, ownership percentage													38.75%
Daly Waters Energy, LP (“DWE”) \| Beetaloo Basin, Phase 2 Development Area
Variable Interest Entity [Line Items]
Equity method investment, ownership percentage		19.38%
Daly Waters Energy, LP (“DWE”) \| Beetaloo Basin, Pilot Area
Variable Interest Entity [Line Items]
Equity method investment, ownership percentage		47.50%
Falcon \| Beetaloo Basin
Variable Interest Entity [Line Items]
Equity method investment, ownership percentage		22.50%											22.50%
Falcon \| Beetaloo Basin, SS2 Well Pad \| Maximum
Variable Interest Entity [Line Items]
Equity, ownership percentage												5.00%
Falcon \| Beetaloo Basin, Phase 2 Development Area
Variable Interest Entity [Line Items]
Equity method investment, ownership percentage		22.50%
Falcon \| Beetaloo Basin, Pilot Area
Variable Interest Entity [Line Items]
Equity, ownership percentage		5.00%
Beetaloo Basin
Variable Interest Entity [Line Items]
Net prospective, development-ready acres retained (in acres) \| acre ft		1,900,000
Beetaloo Basin \| Tamboran (B1) Pty Ltd ("TB1")
Variable Interest Entity [Line Items]
Subsidiary, ownership percentage													77.50%
Beetaloo Basin, SS2 Well Pad \| Tamboran B2 Pty Ltd \| Minimum
Variable Interest Entity [Line Items]
Subsidiary, ownership percentage											95.00%
Beetaloo Basin, Phase 2 Development Area
Variable Interest Entity [Line Items]
Subsidiary, ownership percentage		58.12%
Phase two development area, gross acres reserved (in acres) \| acre ft		406,693
Beetaloo Basin, Phase 2 Development Area \| Tamboran Resources Corporation
Variable Interest Entity [Line Items]
Phase two development area, gross acres reserved (in acres) \| acre ft		236,370
Beetaloo Basin, Ex-EP 76, 98 and 117
Variable Interest Entity [Line Items]
Subsidiary, ownership percentage		77.50%
Daly Waters Energy, LP (“DWE”)
Variable Interest Entity [Line Items]
Asset sale agreement, acres of non-operating and non-controlling interest (in acres) \| acre ft		100,000
Asset sale agreement, consideration transferred		$ 15.0
Asset sale agreement, consideration transferred per acre (in USD per acre) \| $ / a		150
Daly Water Energy LP \| Tamboran (B1) Pty Ltd \| Checkerboarding Strategy, Tranche 1
Variable Interest Entity [Line Items]
Variable interest entity, retention licenses, percentage split		38.75%
Tamboran (West) Pty Ltd (“TR West”) \| Daly Waters Energy, LP (“DWE”)
Variable Interest Entity [Line Items]
Asset acquisition, consideration transferred		$ 15.0
Variable interest entity, primary beneficiary \| Tamboran (B1) Pty Ltd ("TB1")
Variable Interest Entity [Line Items]
Joint venture, ownership percentage				50.00%
Variable interest entity, primary beneficiary \| Beetaloo Basin
Variable Interest Entity [Line Items]
Subsidiary, ownership percentage													38.75%
Variable interest entity, primary beneficiary \| Beetaloo Basin, Pilot Area
Variable Interest Entity [Line Items]
Subsidiary, ownership percentage		47.50%
Variable interest entity, primary beneficiary \| Daly Waters Energy, LP (“DWE”) \| Tamboran (B1) Pty Ltd ("TB1")
Variable Interest Entity [Line Items]
Joint venture, ownership percentage			50.00%
Commitments and contingencies (Note 12)							$ 7.5			$ 7.5
Issuance of stock and warrants for services or claims								$ 15.0
Variable interest entity, primary beneficiary \| Daly Waters Infrastructure, LP (“DWI”) \| Tamboran SPCF Pty Ltd (“TR SPCF")
Variable Interest Entity [Line Items]
Joint venture, ownership percentage						50.00%