v3.26.1
SCHEDULE H, PART IV, LINE 4i – SCHEDULE OF ASSETS (HELD AT END OF YEAR) (Details) - EBP 001
12 Months Ended
Dec. 31, 2025
USD ($)
EBP, Schedule of Asset Held for Investment [Line Items]  
Entity tax identification number 98-0460263
Plan number 001
Current Value $ 1,293,625,298
Participant Loans 16,440,591
Total Assets Held 1,310,065,889
Mutual funds  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value 183,029,307
Common collective trusts  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value 1,083,323,333
TC Energy common stock  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value 11,732,635
South Bow common stock  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value $ 989,754
Minimum  
EBP, Schedule of Asset Held for Investment [Line Items]  
Participant loan interest rate 3.25%
Maximum  
EBP, Schedule of Asset Held for Investment [Line Items]  
Participant loan interest rate 9.50%
Investment, Identifier [Axis]: Allspring Special Mid-Cap Value | Common Collective Trust  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value $ 15,747,633
Investment, Identifier [Axis]: Baird Core Plus Bond Fund | Mutual Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value 18,172,467
Investment, Identifier [Axis]: Fidelity® BrokerageLink | Participant Directed Brokerage Account  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value 14,541,518
Investment, Identifier [Axis]: Fidelity® Growth Company Commingled Pool | Common Collective Trust  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value 214,492,897
Investment, Identifier [Axis]: Fidelity® Inflation-Protected Bond Index Fund | Mutual Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value 5,567,696
Investment, Identifier [Axis]: Fidelity® Spartan 500 Index Pool | Common Collective Trust  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value 172,071,481
Investment, Identifier [Axis]: Fidelity® Spartan Extended Market Index Pool | Common Collective Trust  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value 55,345,283
Investment, Identifier [Axis]: Fidelity® Spartan Total International Index Pool | Common Collective Trust  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value 20,575,819
Investment, Identifier [Axis]: Fidelity® U.S. Bond Index Fund | Mutual Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value 20,044,720
Investment, Identifier [Axis]: Interest Bearing Cash | Cash  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value 8,751
Investment, Identifier [Axis]: JPMorgan Equity Income Fund Class R6 | Mutual Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value 42,699,870
Investment, Identifier [Axis]: Janus Henderson Enterprise Fund Class T | Mutual Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value 21,020,581
Investment, Identifier [Axis]: MFS International Diversification Fund R3 | Mutual Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value 32,510,779
Investment, Identifier [Axis]: Mellon Stable Value | Common Collective Trust  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value 9,909,444
Investment, Identifier [Axis]: South Bow Corporation | Common Stock  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value 988,388
Investment, Identifier [Axis]: South Bow Stock Fund | Stock Purchase Account  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value 1,366
Investment, Identifier [Axis]: TC Energy Corporation | Common Stock  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value 11,723,574
Investment, Identifier [Axis]: TC Energy Stock Fund | Stock Purchase Account  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value 9,061
Investment, Identifier [Axis]: Vanguard Federal Money Market Fund | Mutual Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value 43,013,194
Investment, Identifier [Axis]: Vanguard Institutional Target Retirement Income Fund | Common Collective Trust  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value 13,725,389
Investment, Identifier [Axis]: Vanguard Target Retirement 2020 | Common Collective Trust  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value 14,593,246
Investment, Identifier [Axis]: Vanguard Target Retirement 2025 | Common Collective Trust  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value 40,887,098
Investment, Identifier [Axis]: Vanguard Target Retirement 2030 | Common Collective Trust  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value 76,487,374
Investment, Identifier [Axis]: Vanguard Target Retirement 2035 | Common Collective Trust  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value 71,642,692
Investment, Identifier [Axis]: Vanguard Target Retirement 2040 | Common Collective Trust  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value 91,963,662
Investment, Identifier [Axis]: Vanguard Target Retirement 2045 | Common Collective Trust  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value 81,753,832
Investment, Identifier [Axis]: Vanguard Target Retirement 2050 | Common Collective Trust  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value 97,564,699
Investment, Identifier [Axis]: Vanguard Target Retirement 2055 | Common Collective Trust  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value 70,290,954
Investment, Identifier [Axis]: Vanguard Target Retirement 2060 | Common Collective Trust  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value 30,077,175
Investment, Identifier [Axis]: Vanguard Target Retirement 2065 | Common Collective Trust  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value 5,232,014
Investment, Identifier [Axis]: Vanguard Target Retirement 2070 | Common Collective Trust  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value $ 962,641