Total investments, at fair value EBP, Investment, Fair Value Legal Entity [Axis] Legal Entity [Axis] EBP, Description of Plan [Table] EBP, Description of Plan [Table] Mutual funds Mutual Fund [Member] Other investments measured at NAV EBP, Other Investment [Member] Sold interests EBP, Investment Sold, Excluding Plan Interest in Master Trust, Selling Price EBP, Related Party and Party-in-Interest Transactions [Table] EBP, Related Party and Party-in-Interest Transactions [Table] EBP, Fully Benefit-Responsive Investment Contract [Table] EBP, Fully Benefit-Responsive Investment Contract [Table] Total deductions Administrative and investment expenses EBP, Change in Net Asset Available for Benefit, Decrease Fair Value Measurement Investments Measured Using the Net Asset Value per Share Practical Expedient EBP, Investment, Fair Value and NAV [Text Block] Accrued administrative expenses EBP, Accrued Expense Investment income allocated to the Plan, excluding administrative expenses EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Investment Income (Loss), after Investment Expense EBP, Fully Benefit-Responsive Investment Contract [Abstract] Plan's Interest in Master Trust Balances EBP, Nonconsolidated, Plan Interest in Master Trust [Member] Per Form 5500 EBP, Form 5500 Caption, Total Administrative Expenses EBP, Reconciliation of Financial Statement to Form 5500 EBP, Reconciliation of Financial Statement to Form 5500 [Table Text Block] EBP, Fully Benefit-Responsive Investment Contract EBP, Fully Benefit-Responsive Investment Contract [Text Block] Vested Percentage EBP, Employer Contribution Vesting Percentage EBP, Employer Contribution Vesting Percentage EBP, Investment, Fair Value and NAV [Abstract] Reclass for Form 5500 Purposes EBP, Reconciliation To Form 5500, Increase (Decrease) From Income (Loss) On Investment EBP, Reconciliation To Form 5500, Increase (Decrease) From Income (Loss) On Investment Total assets EBP, Asset Assets: EBP, Asset [Abstract] 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] Transfer from Qualified Defined Benefit Pension Plan Transfer to plan EBP, Change in Net Asset Available for Benefit, Transfer to (from) Plan EBP, Master Trust [Line Items] EBP, Master Trust [Line Items] Total liabilities EBP, Liability Amendment Flag Amendment Flag Basis of Presentation EBP, Basis of Accounting [Policy Text Block] Investment in the Charter Communications, Inc. Defined Contribution Plans Master Trust EBP, Investment, Plan Interest in Master Trust, Fair and Contract Value Investment, number of shares (in shares) EBP, Investment, Number of Shares EBP, Description of Plan and Accounting Change [Abstract] EBP, Receivable [Abstract] EBP, Receivable [Abstract] EBP, Investment, Fair Value and NAV EBP, Investment, Fair Value and NAV [Table Text Block] EBP 003 EBP 003 [Member] EBP 003 Transfers in EBP, Change In Net Asset Available For Benefit, Transfer To Plan EBP, Change In Net Asset Available For Benefit, Transfer To Plan Reclass for Form 5500 Purposes EBP, Reconciliation To Form 5500, Increase (Decrease), Administrative Expenses EBP, Reconciliation To Form 5500, Increase (Decrease) Number of funds EBP, Investments, Number Of Funds EBP, Investments, Number Of Funds Investments [Domain] Investments [Domain] Other common stocks EBP, Nonemployer, Common Stock [Member] EBP, Master Trust [Abstract] At contract value EBP, Investment, Plan Interest in Master Trust, Contract Value Use of Estimates EBP, Use of Estimate [Policy Text Block] Cover [Abstract] Risks and Uncertainties EBP, Risk and Uncertainty [Text Block] Employer contributions EBP, Change in Net Asset Available for Benefit, Increase from Employer Contribution, Cash EBP, Synthetic Investment Contract EBP, Synthetic Investment Contract [Member] Transfers out EBP, Change In Net Asset Available For Benefit, Transfer From Plan EBP, Change In Net Asset Available For Benefit, Transfer From Plan Investment Type [Axis] Investment Type [Axis] Net investment gain in the Charter Communications, Inc. Defined Contribution Plans Master Trust Net appreciation in fair value of investments EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Gain (Loss) on Investment Interest and dividends 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] EBP, Vesting Service Period [Axis] EBP, Vesting Service Period [Axis] EBP, Vesting Service Period EBP, Investment, Fair Value and NAV [Line Items] EBP, Investment, Fair Value and NAV [Line Items] Description of 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] Contributions EBP, Contribution [Policy Text Block] EBP, Nonconsolidated, Master Trust and Plan Interest in Master Trust [Domain] EBP, Nonconsolidated, Master Trust and Plan Interest in Master Trust [Domain] EBP, Fair Value, Investment, NAV [Abstract] Charter Communications, Inc. common stock EBP, Employer, Common Stock [Member] EBP, Accounting Policy [Table] EBP, Accounting Policy [Table] Total additions EBP, Change in Net Asset Available for Benefit, Increase Administrative expenses EBP, Change in Net Asset Available for Benefit, Decrease from Administrative Expense Investments, at contract value EBP, Investment, Contract Value Document Information [Line Items] Document Information [Line Items] EBP, Risk and Uncertainty [Line Items] EBP, Risk and Uncertainty [Line Items] EBP, Risk and Uncertainty [Table] EBP, Risk and Uncertainty [Table] Investments EBP, Master Trust [Text Block] EBP, Vesting Service Period [Domain] EBP, Vesting Service Period [Domain] EBP, Vesting Service Period [Domain] Investments, realized gains EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Realized Gain (Loss) on Investment Participant compensation matched, percentage EBP, Employer Contribution, Participant Compensation Matched, Percentage EBP, Statement of Change in Net Asset Available for Benefit [Abstract] Index Fund Index Fund [Member] Index Fund Core Actively Managed Funds Core Actively Managed Funds [Member] Core Actively Managed Funds Target Retirement Date Funds Target Retirement Date Funds [Member] Target Retirement Date Funds Required service period EBP, Requisite Service Period EBP, Requisite Service Period EBP, Fully Benefit-Responsive Investment Contract [Line Items] EBP, Fully Benefit-Responsive Investment Contract [Line Items] EBP, Tax Status [Table] EBP, Tax Status [Table] Net increase EBP, Change in Net Asset Available for Benefit, Increase (Decrease) Related Party and Parties-in-Interest 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] Employer contributions receivable EBP, Employer Contribution, Receivable Investments, unrealized loss EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Unrealized Gain (Loss) on Investment Benefits paid to participants EBP, Change in Net Asset Available for Benefit, Decrease from Payment to Participant Fair Value Plan interest in master trust, fair value EBP, Investment, Plan Interest in Master Trust, Fair Value Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] EBP, Statement of Net Asset Available for Benefit [Abstract] 3 or more Three Years Or More [Member] Three Years Or More EBP, Accounting Policy [Line Items] EBP, Accounting Policy [Line Items] EBP, Tax Status [Abstract] Charter Communications, Inc. common stock fund EBP, Employer, Common Stock Fund [Member] EBP, Reconciliation of Financial Statement to Form 5500 [Table] EBP, Reconciliation of Financial Statement to Form 5500 [Table] Other liabilities EBP, Other Liability EBP, Reconciliation of Financial Statement to Form 5500 [Line Items] EBP, Reconciliation of Financial Statement to Form 5500 [Line Items] Administrative Expenses EBP, Expense [Policy Text Block] Reconciliation of Financial Statements to Form 5500 EBP, Reconciliation of Financial Statement to Form 5500 [Text Block] Investment Valuation and Income Recognition EBP, Investment [Policy Text Block] EBP, Master Trust [Table] EBP, Master Trust [Table] Document Type Document Type Plan Termination EBP, Plan Termination [Text Block] Entity Central Index Key Entity Central Index Key EBP, Reconciliation of Financial Statement to Form 5500 [Abstract] Investment in the Charter Communications, Inc. Defined Contribution Plans Master Trust EBP, Investment, Fair and Contract Value [Abstract] Collective trust funds Common Collective Trust [Member] EBP, Risk and Uncertainty [Abstract] EBP, Tax Status [Line Items] EBP, Tax Status [Line Items] Cash and equivalents Cash and Cash Equivalents [Member] Deductions: EBP, Change in Net Asset Available for Benefit, Decrease [Abstract] Forfeitures used to fund employer contributions EBP, Forfeited Nonvested Account, Decrease from Employer Contribution Master Trust Balance EBP, Nonconsolidated, Master Trust [Member] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Summary of Significant Accounting Policies EBP, Summary of Accounting Policy [Text Block] Entity Registrant Name Entity Registrant Name EBP, Master Trust EBP, Master Trust [Table Text Block] Purchased interests EBP, Investment Acquired, Excluding Plan Interest in Master Trust, Cost Liabilities: EBP, Liability [Abstract] Subsequent Events EBP, Subsequent Event [Policy Text Block] Tax Status EBP, Tax Status [Text Block] Document Information [Table] Document Information [Table] Net investment gain EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Income (Loss) on Investment Forfeitures used to reduce the amount of employer contributions and/or administrative expenses EBP, Forfeited Nonvested Account, Decrease From Administrative Expenses And Employer Contribution EBP, Forfeited Nonvested Account, Decrease From Administrative Expenses And Employer Contribution EBP, Employer Contribution Vesting EBP, Employer Contribution Vesting [Table Text Block] EBP, Employer Contribution Vesting EBP, Nonconsolidated, Master Trust and Plan Interest in Master Trust [Axis] EBP, Nonconsolidated, Master Trust and Plan Interest in Master Trust [Axis] EBP, Related Party and Party-in-Interest Transactions [Line Items] EBP, Related Party and Party-in-Interest Transactions [Line Items] Other receivables EBP, Other Receivable Net assets available for benefits Net assets available for benefits, beginning of year Net assets available for benefits, end of year EBP, Net Asset Available for Benefit Entity [Domain] Entity [Domain] Less than 3 Less Than Three Years [Member] Less Than Three Years At contract value EBP, Investment, Excluding Plan Interest in Master Trust, Contract Value Unallocated forfeitures EBP, Forfeited Nonvested Account Fair Value Measured at Net Asset Value Per Share Fair Value Measured at Net Asset Value Per Share [Member] EBP, Investment, Fair Value and NAV [Table] EBP, Investment, Fair Value and NAV [Table] Interest in master trust, percentage EBP, Interest in Master Trust, Percentage EBP, Statement of Net Asset Available for Benefit [Line Items] EBP, Statement of Net Asset Available for Benefit [Line Items] Per Form 5500 EBP, Form 5500 Caption, Earnings On Investments EBP, Form 5500 Caption, Earnings On Investments