Pipeline Group Inc Columbia Pipeline Group Inc. [Member] Columbia Pipeline Group Inc. Other revenue EBP, Change In Net Assets Available For Benefits, Other Revenue EBP, Change In Net Assets Available For Benefits, Other Revenue Entity tax identification number Entity Tax Identification Number Employee rollovers EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Rollover Maximum Maximum [Member] Legal Entity [Axis] Legal Entity [Axis] Statistical Measurement [Domain] Statistical Measurement [Domain] EBP, Description of Plan [Table] EBP, Description of Plan [Table] Mutual funds Mutual Fund [Member] EBP, Related Party and Party-in-Interest Transactions [Table] EBP, Related Party and Party-in-Interest Transactions [Table] Before tax participant contribution limit, as % of eligible compensation EBP, Participant Contribution, Pretax, Maximum Annual Compensation to Total Compensation, Percentage Participant directed brokerage account EBP, Self-Directed Brokerage Account [Member] Total Deductions EBP, Change in Net Asset Available for Benefit, Decrease Plan participants maximum borrowing amount from account EBP, Note Receivable from Participant, Account, Maximum Borrowing, Amount Investments EBP, Investment, Fair Value and NAV [Text Block] Minimum borrowing, amount EBP, Note Receivable from Participant, Account, Minimum Borrowing, Amount Accrued management fees EBP, Accrued Expense Investments at fair value (Note 3) Plan Identified Investments Held by Master Trust at Fair Value EBP, Investment, Excluding Plan Interest in Master Trust, Fair Value Income allocated to participants EBP, Income Allocated To Participants EBP, Income Allocated To Participants Level I Fair Value, Inputs, Level 1 [Member] EBP, Investment, Fair Value and NAV [Abstract] Total Asset EBP, Asset Assets EBP, Asset [Abstract] Statistical Measurement [Axis] Statistical Measurement [Axis] Additions EBP, Change in Net Asset Available for Benefit, Increase [Abstract] EBP, Statement of Change in Net Asset Available for Benefit [Table] EBP, Statement of Change in Net Asset Available for Benefit [Table] Payment of Benefits EBP, Payment to Participant [Policy Text Block] EBP 001 EBP 001 [Member] EBP 001 After tax contribution percentage EBP, Contribution Plan Maximum After Tax Contribution Percentage EBP, Contribution Plan Maximum After Tax Contribution Percentage Total Liability EBP, Liability Amendment Flag Amendment Flag Basis of Accounting EBP, Basis of Accounting [Policy Text Block] EBP, Schedule of Asset Held for Investment [Table] EBP, Schedule of Asset Held for Investment [Table] EBP, Description of Plan and Accounting Change [Abstract] Schedule of Fair Value Hierarchy EBP, Investment, Fair Value and NAV [Table Text Block] Service withdrawal Participation period EBP, Contribution Plan In Service Withdrawal Participation Period EBP, Contribution Plan In Service Withdrawal Participation Period Other Liabilities EBP, Other Liabilities [Text Block] EBP, Other Liabilities South Bow common stock EBP, Employer, Common Stock, Spin Off Entity [Member] EBP, Employer, Common Stock, Spin Off Entity Income from revenue sharing EBP, Income From Revenue Sharing EBP, Income From Revenue Sharing Investments [Domain] Investments [Domain] Use of Estimates EBP, Use of Estimate [Policy Text Block] EBP, Related Party and Party-in-Interest [Domain] EBP, Related Party and Party-in-Interest [Domain] SCHEDULE H, PART IV, LINE 4i – SCHEDULE OF ASSETS (HELD AT END OF YEAR) EBP, Schedule of Asset Held for Investment [Text Block] Cover [Abstract] Employee contributions EBP, Change in Net Asset Available for Benefit, Increase from Employer Contribution, Cash EBP, Related Party and Party-in-Interest [Axis] EBP, Related Party and Party-in-Interest [Axis] Minimum Minimum [Member] Investment Type [Axis] Investment Type [Axis] Interest on notes receivable from participants EBP, Change in Net Asset Available for Benefit, Increase from Interest Income on Note Receivable from Participant Total contributions EBP, Change in Net Asset Available for Benefit, Increase from Contribution Employee contributions EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Excluding Rollover EBP, Employer, Common Stock, Stock Purchase Account EBP, Employer, Common Stock, Stock Purchase Account [Member] EBP, Employer, Common Stock, Stock Purchase Account General loan, borrowing term EBP, Note Receivable From Participant, General Loan, Borrowing Term EBP, Note Receivable From Participant, General Loan, Borrowing Term Net appreciation (depreciation) in fair value of investments EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Gain (Loss) on Investment Interest and dividend income EBP, Change in Net Asset Available for Benefit, Increase from Interest and Dividend Income on Investment EBP, Description of Plan [Line Items] EBP, Description of Plan [Line Items] Plan number EBP, Plan Number EBP, Investment, Fair Value and NAV [Line Items] EBP, Investment, Fair Value and NAV [Line Items] Description of the Plan EBP, Description of Plan [Text Block] EBP, Statement of Change in Net Asset Available for Benefit [Line Items] EBP, Statement of Change in Net Asset Available for Benefit [Line Items] EBP, Statement of Net Asset Available for Benefit [Table] EBP, Statement of Net Asset Available for Benefit [Table] EBP, Employer Contribution, Type [Axis] EBP, Employer Contribution, Type [Axis] EBP, Employer Contribution, Type EBP, Schedule of Asset Held for Investment [Line Items] EBP, Schedule of Asset Held for Investment [Line Items] Contribution vesting percentage EBP, Employer Contribution Vesting Percentage Company contribution and/ or investment earning percentage vesting to the participant in Company Matching Contributions, Fixed Rate Contributions, Discretionary Profit-Sharing Contributions, Qualified Non-Elective Contributions, and Disability Contributions, upon completion of minimum service period or attainment of maximum vesting age Contributions EBP, Contribution [Policy Text Block] TC Energy common stock EBP, Employer, Common Stock [Member] EBP, Schedule of Asset Held for Investment [Abstract] EBP, Accounting Policy [Table] EBP, Accounting Policy [Table] Total Additions EBP, Change in Net Asset Available for Benefit, Increase Investment Income EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Income (Loss) on Investment [Abstract] Investment, Identifier [Axis] Investment, Identifier [Axis] Administrative expenses EBP, Change in Net Asset Available for Benefit, Decrease from Administrative Expense Total Assets Held EBP, Asset Held for Investment Rollover contributions permitted to invest in employer stock EBP, Contribution Plan Maximum Percentage Of Rollover Contributions Permitted To Invest In Employer Stock EBP, Contribution Plan Maximum Percentage Of Rollover Contributions Permitted To Invest In Employer Stock Document Information [Line Items] Document Information [Line Items] Interest bearing cash Interest-Bearing Deposits [Member] EBP, Risk and Uncertainty [Line Items] EBP, Risk and Uncertainty [Line Items] Shares received EBP, Spinoff Transaction, Shares Received EBP, Spinoff Transaction, Shares Received Contribution discretionary contribution EBP, Employer Discretionary Contribution EBP, Employer Discretionary Contribution EBP, Risk and Uncertainty [Table] EBP, Risk and Uncertainty [Table] Employer contribution, participation compensation matched percentage EBP, Employer Contribution, Participant Compensation Matched, Percentage EBP, Statement of Change in Net Asset Available for Benefit [Abstract] Level II Fair Value, Inputs, Level 2 [Member] EBP, Tax Status [Table] EBP, Tax Status [Table] Increase (Decrease) in Net Assets Available for Benefits EBP, Change in Net Asset Available for Benefit, Increase (Decrease) Party-in-interest and related party transactions EBP, Related Party and Party-in-Interest Transactions [Text Block] EBP, Related Party and Party-in-Interest Transactions [Abstract] EBP, Accounting Policy, Accounting Standard Update, and Change in Accounting Principle [Abstract] Text Block [Abstract] Counterparty Name [Domain] Counterparty Name [Domain] Employer contribution receivable EBP, Employer Contribution, Receivable Automatic eligible base pay percentage EBP, Participant Contribution, Automatic, Deferral Rate Benefits paid to participants EBP, Change in Net Asset Available for Benefit, Decrease from Payment to Participant Current Value EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value Discretionary profit sharing contribution EBP, Discretionary Profit Sharing Contribution [Member] EBP, Discretionary Profit Sharing Contribution Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Maximum percentage of account value EBP, Contribution Plan Transfer Restrictions Maximum Percentage Of Account Value EBP, Contribution Plan Transfer Restrictions Maximum Percentage Of Account Value EBP, Statement of Net Asset Available for Benefit [Abstract] EBP, Accounting Policy [Line Items] EBP, Accounting Policy [Line Items] EBP, Tax Status [Abstract] Common stock EBP, Employer, Common Stock Fund [Member] Other liabilities (Note 4) EBP, Other Liability Participant Loans EBP, Asset Held for Investment, Participant Loan, after Deemed Distribution Investment Valuation and Income Recognition EBP, Investment [Policy Text Block] Document Type Document Type Entity Central Index Key Entity Central Index Key Participant loan interest rate EBP, Asset Held for Investment, Participant Loan, Interest Rate Common collective trusts Common Collective Trust [Member] Other revenue EBP, Other Revenue EBP, Other Revenue EBP, Tax Status [Line Items] EBP, Tax Status [Line Items] EBP, Risk and Uncertainty [Abstract] EBP, Employer Contribution, Type [Domain] EBP, Employer Contribution, Type [Domain] EBP, Employer Contribution, Type [Domain] EBP, Subsequent Event [Table] EBP, Subsequent Event [Table] Deductions EBP, Change in Net Asset Available for Benefit, Decrease [Abstract] Notes receivable from participants EBP, Note Receivable from Participant South Bow South Bow [Member] South Bow Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Summary of accounting policies EBP, Summary of Accounting Policy [Text Block] Entity Registrant Name Entity Registrant Name EBP, Subsequent Event [Abstract] Liabilities EBP, Liability [Abstract] Subsequent events EBP, Subsequent Event [Text Block] Contribution percentage of bonus EBP, Contribution Plan Contribution Percentage Of Bonus EBP, Contribution Plan Contribution Percentage Of Bonus Income taxes EBP, Tax Status [Text Block] Plan participants maximum borrowing percent from account EBP, Note Receivable from Participant, Account, Maximum Borrowing, to Total Account, Percentage EBP, Subsequent Event [Line Items] EBP, Subsequent Event [Line Items] Document Information [Table] Document Information [Table] Counterparty Name [Axis] Counterparty Name [Axis] Available for future Issuance EBP, Revenue Available For Future Issuance EBP, Revenue Available For Future Issuance Notes Receivable from Participants EBP, Note Receivable from Participant [Policy Text Block] Service withdrawal holding period EBP, Contribution Plan In Service Withdrawal Holding Period EBP, Contribution Plan In Service Withdrawal Holding Period Contribution percentage increase EBP, Participant Contribution, Automatic, Annual Increase Deferral Rate EBP, Participant Contribution, Automatic, Annual Increase Deferral Rate Total investment income EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Income (Loss) on Investment Note borrowing term EBP, Note Receivable From Participant, Note Borrowing Term EBP, Note Receivable From Participant, Note Borrowing Term EBP, Related Party and Party-in-Interest Transactions [Line Items] EBP, Related Party and Party-in-Interest Transactions [Line Items] Level III Fair Value, Inputs, Level 3 [Member] Profit sharing contribution percentage EBP, Employer Contribution, Profit Sharing Contribution Percentage EBP, Employer Contribution, Profit Sharing Contribution Percentage Net Assets Available for Benefits Net assets available for benefits at beginning of year Net assets available for benefits at end of year EBP, Net Asset Available for Benefit Entity [Domain] Entity [Domain] Contributions EBP, Change in Net Asset Available for Benefit, Increase from Contribution [Abstract] Permitted to invest in employer stock EBP, Contribution Plan Maximum Percentage Of Contributions Permitted To Invest In Employer Stock EBP, Contribution Plan Maximum Percentage Of Contributions Permitted To Invest In Employer Stock EBP, Related Party and Party-in-Interest, Indirect Parent EBP, Related Party and Party-in-Interest, Indirect Parent [Member] EBP, Related Party and Party-in-Interest, Indirect Parent Employer contribution, matching percentage EBP, Employer Contribution, Matching Percentage NAV Fair Value Measured at Net Asset Value Per Share [Member] EBP, Investment, Fair Value and NAV [Table] EBP, Investment, Fair Value and NAV [Table] EBP, Statement of Net Asset Available for Benefit [Line Items] EBP, Statement of Net Asset Available for Benefit [Line Items]