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0002002 - Document - Audit Information
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1001003 - Statement - Statements of Consolidated Comprehensive Income
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1002004 - Statement - Statements of Consolidated Comprehensive Income (Parenthetical)
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1003005 - Statement - Statements of Consolidated Cash Flows
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1004006 - Statement - Consolidated Balance Sheets
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1005007 - Statement - Consolidated Balance Sheets (Parenthetical)
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1006008 - Statement - Statements of Consolidated Shareholders' Equity and Mezzanine Equity
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1007009 - Statement - Statements of Consolidated Shareholders' Equity and Mezzanine Equity (Parenthetical)
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2101101 - Disclosure - Summary of Operations and Significant Accounting Policies
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2202201 - Disclosure - Summary of Operations and Significant Accounting Policies (Policies)
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2303301 - Disclosure - Summary of Operations and Significant Accounting Policies (Tables)
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2404401 - Disclosure - Summary of Operations and Significant Accounting Policies - Organization Narrative (Details)
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2405402 - Disclosure - Summary of Operations and Significant Accounting Policies - Nature of Business Narrative (Details)
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2406403 - Disclosure - Summary of Operations and Significant Accounting Policies - Additional Information (Details)
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2407404 - Disclosure - Summary of Operations and Significant Accounting Policies - Property Plant and Equipment (Details)
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2408405 - Disclosure - Summary of Operations and Significant Accounting Policies - Schedule of Intangible Assets (Details)
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2409406 - Disclosure - Summary of Operations and Significant Accounting Policies - Summary of Accrued Liabilities (Details)
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2410407 - Disclosure - Summary of Operations and Significant Accounting Policies - Asset Retirement Obligation (Details)
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2411408 - Disclosure - Summary of Operations and Significant Accounting Policies - Regulatory Assets (Liabilities) (Details)
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2412409 - Disclosure - Summary of Operations and Significant Accounting Policies - Regulatory Operations and Property, Plant and Equipment (Details)
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2113102 - Disclosure - Investments in Consolidated, Non-Wholly-Owned Entities
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2414410 - Disclosure - Investments in Consolidated, Non-Wholly-Owned Entities - Investment in EQM (Details)
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2415411 - Disclosure - Investments in Consolidated, Non-Wholly-Owned Entities - Investment in EQGP (Details)
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2416412 - Disclosure - Investments in Consolidated, Non-Wholly-Owned Entities - Net Changes in Ownership of EQGP and EQM (Details)
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2117103 - Disclosure - Mergers and Acquisitions
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2318302 - Disclosure - Mergers and Acquisitions - (Tables)
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2419413 - Disclosure - Mergers and Acquisitions - Narrative (Details)
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2420414 - Disclosure - Mergers and Acquisitions - Schedule of Preliminary Purchase Price Allocation (Details)
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2421415 - Disclosure - Mergers and Acquisitions - Post-Acquisition Operating Results (Details)
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2422416 - Disclosure - Mergers and Acquisitions - Unaudited Pro Forma Information (Details)
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2123104 - Disclosure - Impairments of Long-Lived Assets
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2324303 - Disclosure - Impairments of Long-Lived Assets (Tables)
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2425417 - Disclosure - Impairments of Long-Lived Assets - Narrative (Details)
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2426418 - Disclosure - Impairments of Long-Lived Assets - Schedule of Goodwill (Details)
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2127105 - Disclosure - Financial Information by Business Segment
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2328304 - Disclosure - Financial Information by Business Segment (Tables)
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2429419 - Disclosure - Financial Information by Business Segment - Narrative (Details)
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2430420 - Disclosure - Financial Information by Business Segment - Schedule of Segment Information (Details)
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2131106 - Disclosure - Revenue from Contracts with Customers
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2332305 - Disclosure - Revenue from Contracts with Customers (Tables)
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2433421 - Disclosure - Revenue from Contracts with Customers - Disaggregation of Revenue by Business Segment (Details)
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2434422 - Disclosure - Revenue from Contracts with Customers - Changes in Unbilled Revenue (Details)
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2435423 - Disclosure - Revenue from Contracts with Customers - Narrative (Details)
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2436424 - Disclosure - Revenue from Contracts with Customers - Changes in Deferred Revenue Balances (Details)
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2437425 - Disclosure - Revenue from Contracts with Customers - Summary of Remaining Performance Obligations (Details)
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2437425 - Disclosure - Revenue from Contracts with Customers - Summary of Remaining Performance Obligations (Details)
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2138107 - Disclosure - Leases
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2339306 - Disclosure - Leases (Tables)
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2441427 - Disclosure - Leases - Schedule of Operating Lease Cost (Details)
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2442428 - Disclosure - Leases - Schedule of Operating Lease Liability Maturities (Details)
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2442428 - Disclosure - Leases - Schedule of Operating Lease Liability Maturities (Details)
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2143108 - Disclosure - Related Party Transactions
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2344307 - Disclosure - Related Party Transactions (Tables)
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2446430 - Disclosure - Related Party Transactions - Summary of Related Party Transactions (Details)
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2447431 - Disclosure - Related Party Transactions - Summary of Due To (From) Related Parties (Details)
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2148109 - Disclosure - Investment in Unconsolidated Entity
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2349308 - Disclosure - Investment in Unconsolidated Entity (Tables)
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2451433 - Disclosure - Investment in Unconsolidated Entity - Schedule of Unaudited Condensed Financial Statements for the Investment in Unconsolidated Equity (Details)
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2152110 - Disclosure - Share-based Compensation Plans
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2353309 - Disclosure - Share-based Compensation Plans (Tables)
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2454434 - Disclosure - Share-based Compensation Plans - Narrative (Details)
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2455435 - Disclosure - Share-based Compensation Plans - Schedule of Share-based Compensation Expense (Details)
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2456436 - Disclosure - Share-based Compensation Plans - Schedule of Executive Performance Incentive Programs (Details)
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2457437 - Disclosure - Share-based Compensation Plans - Monte Carlo Simulation Valuation Method (Details)
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2458438 - Disclosure - Share-based Compensation Plans - Summary of Restricted Stock Activity (Details)
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2459439 - Disclosure - Share-based Compensation Plans - Schedule of Value Driver Award Programs (Details)
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2460440 - Disclosure - Share-based Compensation Plans - Schedule of Phantom Unit Activity (Details)
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2161111 - Disclosure - Debt
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2362310 - Disclosure - Debt (Tables)
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2463441 - Disclosure - Debt - Schedule of Debt (Details)
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2464442 - Disclosure - Debt - Debt Maturity (Details)
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2465443 - Disclosure - Debt - Equitrans Midstream Term Loan Facility (Details)
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2466444 - Disclosure - Debt - Equitrans Midstream Credit Facility (Details)
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2467445 - Disclosure - Debt - EQM Revolving Credit Facility and Amended 2019 EQM Term Loan Agreement (Details)
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2468446 - Disclosure - Debt - Eureka Credit Facility (Details)
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2469447 - Disclosure - Debt - 2021 Senior Notes (Details)
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2470448 - Disclosure - Debt - Tender Offer (Details)
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2471449 - Disclosure - Debt - 2020 Senior Notes (Details)
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2172112 - Disclosure - Fair Value Measurements
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2473450 - Disclosure - Fair Value Measurements (Details)
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2174113 - Disclosure - (Loss) Earnings Per Share
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2476451 - Disclosure - (Loss) Earnings Per Share (Details)
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2177114 - Disclosure - Income Taxes
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2378312 - Disclosure - Income Taxes (Tables)
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2479452 - Disclosure - Income Taxes - Income Tax Expense (Details)
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2480453 - Disclosure - Income Taxes - Effective Tax Rate (Details)
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2481454 - Disclosure - Income Taxes - Narrative (Details)
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2482455 - Disclosure - Income Taxes - Components of Deferred Taxes (Details)
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2183115 - Disclosure - Concentrations of Credit Risk
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2484456 - Disclosure - Concentrations of Credit Risk (Details)
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2185116 - Disclosure - Commitments and Contingencies
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2486457 - Disclosure - Commitments and Contingencies (Details)
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