1001 - Document - Cover link:presentationLink link:definitionLink link:calculationLink 1002 - Statement - Statements Of Net Assets Available For Benefits link:presentationLink link:definitionLink link:calculationLink 1003 - Statement - Statement Of Changes In Net Assets Available For Benefits link:presentationLink link:definitionLink link:calculationLink 1004 - Disclosure - Description Of Plan link:presentationLink link:definitionLink link:calculationLink 1005 - Disclosure - Significant Accounting Policies link:presentationLink link:definitionLink link:calculationLink 1006 - Disclosure - Exempt Party-In-Interest Transactions link:presentationLink link:definitionLink link:calculationLink 1007 - Disclosure - Federal Income Tax Status link:presentationLink link:definitionLink link:calculationLink 1008 - Disclosure - Fair Value Measurements link:presentationLink link:definitionLink link:calculationLink 1009 - Disclosure - Net Asset Value link:presentationLink link:definitionLink link:calculationLink 1010 - Disclosure - Subsequent Events link:presentationLink link:definitionLink link:calculationLink 1011 - Disclosure - Schedule H, Line 4I - Schedule Of Assets (Held At End Of Year) link:presentationLink link:definitionLink link:calculationLink 1012 - Disclosure - Significant Accounting Policies (Policies) link:presentationLink link:definitionLink link:calculationLink 1013 - Disclosure - Fair Value Measurements (Tables) link:presentationLink link:definitionLink link:calculationLink 1014 - Disclosure - Net Asset Value (Tables) link:presentationLink link:definitionLink link:calculationLink 1015 - Disclosure - Description Of Plan - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 1016 - Disclosure - Exempt Party-In-Interest Transactions - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 1017 - Disclosure - Federal Income Tax Status - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 1018 - Disclosure - Fair Value Measurements - Summary of Classification Of The Investments by Fair Value Hierarchy (Detail) link:presentationLink link:definitionLink link:calculationLink 1019 - Disclosure - Net Asset Value - Summary Of estimate fair value (Detail) link:presentationLink link:definitionLink link:calculationLink 1020 - Disclosure - Schedule H, Line 4I - Schedule Of Assets (Held At End Of Year) (Details) link:presentationLink link:definitionLink link:calculationLink 1021 - Disclosure - Schedule H, Line 4I - Schedule Of Assets (Held At End Of Year) (Details) Alternate link:presentationLink link:definitionLink link:calculationLink Cover [Abstract] Document Information [Table] Document Information [Line Items] Amendment Flag Current Fiscal Year End Date Document Fiscal Period Focus Document Fiscal Year Focus Document Period End Date Document Type Entity Central Index Key Entity Registrant Name Legal Entity [Axis] Entity [Domain] EBP 001 [Member] EBP, Statement of Net Asset Available for Benefit [Abstract] EBP, Statement of Net Asset Available for Benefit [Table] EBP, Statement of Net Asset Available for Benefit [Line Items] EBP, Asset [Abstract] Assets EBP, Asset Total assets EBP, Noninterest-Bearing Cash Non-interest bearing cash EBP, Investment, Excluding Plan Interest in Master Trust, Fair Value Investments, at fair value Investments, at fair value EBP, Net Asset Available for Benefit Net assets available for benefits Net assets available for benefits, beginning of year Net assets available for benefits, end of year EBP, Note Receivable from Participant Notes receivable from participants EBP, Statement of Change in Net Asset Available for Benefit [Abstract] EBP, Statement of Change in Net Asset Available for Benefit [Table] EBP, Statement of Change in Net Asset Available for Benefit [Line Items] EBP, Change in Net Asset Available for Benefit, Decrease [Abstract] Deductions EBP, Change in Net Asset Available for Benefit, Decrease Total deductions EBP, Change in Net Asset Available for Benefit, Decrease from Administrative Expense Administrative expenses EBP, Change in Net Asset Available for Benefit, Decrease from Payment to Participant Benefits paid to participants EBP, Change in Net Asset Available for Benefit, Increase (Decrease) Net increase in net assets available for benefits EBP, Change in Net Asset Available for Benefit, Increase [Abstract] Additions EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Investment Income (Loss), after Investment Expense [Abstract] Investment income EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Gain (Loss) on Investment Net appreciation in fair value of investments EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Income (Loss) on Investment Total Investment income EBP, Change in Net Asset Available for Benefit, Increase from Dividend Income on Investment Dividends EBP, Change in Net Asset Available for Benefit, Increase from Interest Income on Note Receivable from Participant Interest income on notes receivable from participants EBP, Change in Net Asset Available for Benefit, Increase from Contribution [Abstract] Contributions EBP, Change in Net Asset Available for Benefit, Increase Total additions EBP, Change in Net Asset Available for Benefit, Increase from Contribution Total Contributions EBP, Change in Net Asset Available for Benefit, Increase from Employer Contribution, Cash and Noncash Employer EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Excluding Rollover Participant EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Rollover Rollover EBP, Description of Plan and Accounting Change [Abstract] EBP, Description of Plan [Table] EBP, Description of Plan [Line Items] EBP, Description of Plan [Text Block] DESCRIPTION OF PLAN EBP, Summary of Accounting Policy [Text Block] SIGNIFICANT ACCOUNTING POLICIES EBP, Related Party and Party-in-Interest Transactions [Abstract] EBP, Related Party and Party-in-Interest Transactions [Table] EBP, Related Party and Party-in-Interest Transactions [Line Items] EBP, Related Party and Party-in-Interest Transactions [Text Block] Exempt Party-In-Interest Transactions EBP, Tax Status [Abstract] EBP, Tax Status [Table] EBP, Tax Status [Line Items] EBP, Tax Status [Text Block] FEDERAL INCOME TAX STATUS EBP, Investment, Fair Value and NAV [Abstract] EBP, Investment, Fair Value and NAV [Table] EBP, Investment, Fair Value and NAV [Line Items] EBP, Investment, Fair Value and NAV [Text Block] FAIR VALUE MEASUREMENTS EBP, Fair Value, Investment, NAV [Abstract] Employee Benefit Plan Investment Fair Value Estimated Nav [Table] Employee Benefit Plan Investment Fair Value Estimated Nav [Line Items] Employee Benefit Plan Investment Net Asset Value [Text Block] Net Asset Value Employee benefit plan investment net asset value. EBP, Subsequent Event [Abstract] EBP, Subsequent Event [Table] EBP, Subsequent Event [Line Items] EBP, Subsequent Event [Text Block] EBP, Schedule of Asset Held for Investment [Abstract] EBP, Schedule of Asset Held for Investment [Table] EBP, Schedule of Asset Held for Investment [Line Items] EBP, Schedule of Asset Held for Investment [Text Block] Schedule H, Line 4I - Schedule Of Assets (Held at End of Year) EBP, Risk and Uncertainty [Policy Text Block] Risks and Uncertainties EBP, Basis of Accounting [Policy Text Block] Basis of Presentation EBP, Investment [Policy Text Block] Investment Income and Expense Recognition EBP, Note Receivable from Participant [Policy Text Block] Notes Receivable from Participants EBP, Payment to Participant [Policy Text Block] Benefit Payments EBP, Use of Estimate [Policy Text Block] Use of Estimates EBP, Investment, Fair Value and NAV [Table Text Block] Summary of classification of the investments by fair value hierarchy Employee Benefit Plan Investment Fair Value Estimated Nav [Table Text Block] Summary of estimate fair value Employee benefit plan investment fair value estimated nav. EBP Employer Contribution Vesting Bears Interest Percentage EBP, Employer contribution vesting bears interest percentage EBP employer contribution vesting bears interest percentage. EBP Employer Contribution Vesting Percentage EBP, Employer contribution vesting percentage EBP employer contribution vesting percentage. EBP Newly Hired Employees Enrolled Automatically Into Plan Pre Tax Contribution Percentage EBP, Newly hired employees enrolled automatically into plan pre tax contribution percentage EBP newly hired employees enrolled automatically into plan pre tax contribution percentage. Ebp Non Us Utility Employees Withdrawal The Payment Of Benefit Contribution EBP, Non US utility employees withdrawal the payment of benefit contribution Ebp non us utility employees withdrawal the payment of benefit contribution. EBP Participant Contribution After Tax Minimum Contribution To Total Compensation Percentage EBP, Participant contribution after tax minimum contribution to total compensation percentage EBP participant contribution after tax Mminimum contribution to total compensation percentage. EBP Participation Contribution Pretax Minimum Annual Compensation To Total Compensation Percentages EBP, Participation contribution pretax minimum annual compensation to total compensation percentage EBP participation contribution pretax minimum annual compensation to total compensation percentages.. EBP, Employer Contribution, Matching Percentage EBP, Employer contribution, matching percentage EBP, Employer Contribution, Participant Compensation Matched, Percentage EBP, Employer contribution, Participant compensation matched, Percentage Employee Benefit Plan Enhanced Catch Up Contribution Employee benefit plan enhanced catch up contribution Employee benefit plan enhanced catch up contribution. EBP, Note Receivable from Participant, Account, Maximum Borrowing, Amount EBP, Note receivable from participant, Account, Maximum borrowing, Amount EBP, Note Receivable from Participant, Account, Maximum Borrowing, to Total Account, Percentage EBP, Note receivable from participant account maximum borrowing to total account, Percentage EBP, Note Receivable from Participant, Account, Minimum Borrowing, Amount EBP, note receivable from participant, Account, Minimum borrowing, Amount Employee Benefit Plan Participant Contribution After Tax Maximum Annual Compensation To Total Compensation Percentage Employee benefit plan participant contribution after tax maximum annual compensation to total compensation percentage Employee benefit plan participant contribution after tax maximum annual compensation to total compensation percentage. EBP, Participant Contribution, Automatic, Deferral Rate EBP, Participant contribution, Automatic, deferral rate EBP, Participant Contribution, Pretax, Maximum Annual Compensation, Amount EBP, participant contribution, Pretax, Maximum annual compensation, Amount EBP, Participant Contribution, Pretax, Maximum Annual Compensation to Total Compensation, Percentage EBP, Participant contribution, Pretax, Maximum annual compensation to total compensation, Percentage Employee Benefit Plan Participant Contribution Pre Tax Maximum Combined Compensation To Total Compensation Percentage Employee benefit plan participant contribution pre tax maximum combined compensation to total compensation percentage Employee benefit plan participant contribution pre tax maximum combined compensation to total compensation percentage. Employee Benefit Plan Participants Contribution Less Than Percentage Employee benefit plan participants contribution less than percentage Employee benefit plan participants contribution less than percentage. Employee Benefit Plan Participants Contribution Not More Than Percentage Employee benefit plan participants contribution not more than percentage Employee benefit plan participants contribution not more than percentage. Employee Benefit Plan Participants Entitled To Make Contribution Percentage Employee benefit plan participants entitled to make contribution percentage Employee benefit plan participants entitled to make contribution percentage. Employee Benefit Plan Standard Catch Up Contribution Employee benefit plan standard catch up contribution Employee benefit plan standard catch up contribution. Employee Benefit Plan Standard Catch Up Contribution Percentage Employee benefit plan standard catch up contribution percentage Employee benefit plan standard catch up contribution percentage. Statistical Measurement [Axis] Statistical Measurement [Domain] Maximum [Member] Minimum [Member] Employee Benefit Plan Administrative Fee Paid Employee Benefit Plan Administrative Fee Paid. EBP, Investment, Number of Shares EBP, Investment, Plan Interest in Master Trust, Fair Value Employee Benefit Plan Related Dividend Income Employee Benefit Plan Related Dividend Income. EBP, Tax Determination Letter, Date Tax Determination Letter, Date Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Domain] Fair Value, Inputs, Level 1 [Member] Fair Value Measured at Net Asset Value Per Share [Member] Investment Type [Axis] Investments [Domain] Common Stock [Member] Common Collective Trust [Member] Investment [Member] Registered Investment Fund [Member] Short Term Investment [Member] Stable Value Trust Fund [Member] EBP, Fair Value, Investment, NAV, Redemption, Description Redemption Frequency EBP, Fair Value, Investment, NAV, Redemption, Notice Period Redemption Notice Period EBP, Fair Value, Investment, NAV, Redemption Other Restriction, Description Other Restrictions EBP, Fair Value, Investment, NAV, Unfunded Commitment Unfunded Commitment Fixed Income Index Fund [Member] Foreign Large Blend Portfolio [Member] LifePath Funds [Member] Stable Value Trust Fund T Rowe Price [Member] US Large Cap Blend Fund [Member] EBP, Participant-Directed and Nonparticipant-Directed Status [Axis] EBP, Participant-Directed and Nonparticipant-Directed Status [Domain] EBP Asset Held For Investment Cost EBP asset held for investment cost. EBP, Asset Held for Investment Total EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] EBP, Asset Held for Investment, Participant Loan, after Deemed Distribution EBP, Asset Held for Investment, Party-in-Interest [true false] EBP, Investment, Issuer Name [Extensible Enumeration] EBP, Investment, Current Value, Type [Extensible Enumeration] EBP, Asset Held for Investment, Participant Loan, Interest Rate EBP, Plan Number Entity Tax Identification Number Investment, Identifier [Axis] Investment, Issuer Name [Axis] Investment, Issuer Name [Domain] BlackRock Equity Index Fund [Member] BlackRock Extended Equity Market Index Fund [Member] BlackRock LifePath Index Retirement Fund [Member] BlackRock LifePath Index Two thousand fifty five [Member] BlackRock LifePath Index 2055 BlackRock LifePath Index Two Thousand Fifty [Member] BlackRock LifePath Index 2050 BlackRock LifePath Index Two Thousand Forty Five [Member] BlackRock LifePath Index 2045 BlackRock LifePath Index Two Thousand Forty [Member] BlackRock LifePath Index 2040 BlackRock LifePath Index Two thousand seventy [Member] BlackRock LifePath Index 2070 BlackRock LifePath Index Two thousand sixty five [Member] BlackRock LifePath Index 2065 BlackRock LifePath Index Two thousand sixty [Member] BlackRock LifePath Index 2060 BlackRock LifePath Index Two Thousand Thirty Five [Member] BlackRock LifePath Index 2035 BlackRock LifePath Index Two Thousand Thirty [Member] BlackRock LifePath Index 2030 BlackRock MSCI ACWI [Member] BlackRock Russell 1000 Growth Fund [Member] BlackRock Russell 1000 Value Fund [Member] BlackRock US Debt Index Fund [Member] Dodge & Cox Income Fund [Member] Dodge & Cox International Stock Fund [Member] Enbridge Inc. Stock [Member] Hartford Schroders Emerging Markets Equity Fund [Member] MFS Institutional International Equity Fund [Member] Notes Receivable From Participants [Member] Schwab Personal Choice Retirement Account [Member] T. Rowe Price Blue Chip Growth Fund [Member] T. Rowe Price Government Money [Member] T. Rowe Price Institutional Small-Cap Stock Fund [Member] T. Rowe Price Mid Cap Growth Fund [Member] T. Rowe Price Stable Value Trust Fund [Member] Vanguard Equity-Income Adm [Member] Vanguard Federal Money Market Fund [Member] EBP, Employer, Common Stock [Member] EBP, Participant-Directed [Member]