EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Rollover EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Rollover EBP, Investment, Fair Value EBP, Investment, Fair Value Maximum Maximum [Member] Participant Contribution Automatic Annual Increase Deferral Rate Participant Contribution Automatic Annual Increase Deferral Rate Participant Contribution Automatic Annual Increase Deferral Rate Legal Entity [Axis] Legal Entity [Axis] EBP, Description of Plan [Table] EBP, Description of Plan [Table] Statistical Measurement [Domain] Statistical Measurement [Domain] Mutual Fund Mutual Fund [Member] EBP, Schedule of Delinquent Participant Contribution, Corrected EBP, Schedule of Delinquent Participant Contribution, Corrected EBP, Reconciliation to Form 5500, Note Receivable, Deemed Distribution EBP, Reconciliation to Form 5500, Note Receivable, Deemed Distribution Document Fiscal Year Focus Document Fiscal Year Focus EBP, Related Party and Party-in-Interest Transactions [Table] EBP, Related Party and Party-in-Interest Transactions [Table] EBP, Self-Directed Brokerage Account EBP, Self-Directed Brokerage Account [Member] Vanguard Target Retirement 2065 Trust Plus Vanguard Target Retirement 2065 Trust Plus [Member] Vanguard Target Retirement 2065 Trust Plus EBP, Note Receivable from Participant, Account, Maximum Borrowing, Amount EBP, Note Receivable from Participant, Account, Maximum Borrowing, Amount EBP Vested Account Balance at Distribution EBP Vested Account Balance at Distribution EBP Vested Account Balance at Distribution EBP, Investment, Fair Value and NAV EBP, Investment, Fair Value and NAV [Text Block] EBP, Note Receivable from Participant, Account, Minimum Borrowing, Amount EBP, Note Receivable from Participant, Account, Minimum Borrowing, Amount EBP, Nonparticipant-Directed Investment [Abstract] EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Investment Income (Loss), after Investment Expense EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Investment Income (Loss), after Investment Expense EBP, Investment, Excluding Plan Interest in Master Trust, Fair Value EBP, Investment, Excluding Plan Interest in Master Trust, Fair Value Money Market Funds Money Market Funds [Member] NCE EIP EBP 006 [Member] EBP 006 Vanguard Value Index Fund Institutional Shares Vanguard Value Index Fund Institutional Shares [Member] Vanguard Value Index Fund Institutional Shares Fair Value, Inputs, Level 1 Fair Value, Inputs, Level 1 [Member] Vanguard Emerging Markets Stock Index Fund Institutional Shares Vanguard Emerging Markets Stock Index Fund Institutional Shares [Member] Vanguard Emerging Markets Stock Index Fund Institutional Shares Vanguard Institutional 500 Index Trust Vanguard Institutional 500 Index Trust [Member] Vanguard Institutional 500 Index Trust EBP, Investment, Fair Value and NAV [Abstract] Vanguard Institutional Extended Market Index Trust Vanguard Institutional Extended Market Index Trust [Member] Vanguard Institutional Extended Market Index Trust Measurement Input Type [Axis] Measurement Input Type [Axis] Statistical Measurement [Axis] Statistical Measurement [Axis] EBP, Statement of Change in Net Asset Available for Benefit [Table] EBP, Statement of Change in Net Asset Available for Benefit [Table] EBP, Master Trust [Line Items] EBP, Master Trust [Line Items] EBP, Reconciliation to Form 5500, Payment to Participant, Increase (Decrease) from Deemed Distribution EBP, Reconciliation to Form 5500, Payment to Participant, Increase (Decrease) from Deemed Distribution Amendment Flag Amendment Flag Vanguard Target Retirement 2020 Trust Plus Vanguard Target Retirement 2020 Trust Plus [Member] Vanguard Target Retirement 2020 Trust Plus EBP, Interest in Master Trust income (in percentage) EBP, Interest in Master Trust income (in percentage) EBP, Interest in Master Trust income (in percentage) EBP, Schedule of Asset Held for Investment [Table] EBP, Schedule of Asset Held for Investment [Table] Valuation Approach and Technique [Domain] Valuation Approach and Technique [Domain] Vanguard Target Retirement 2050 Trust Plus Vanguard Target Retirement 2050 Trust Plus [Member] Vanguard Target Retirement 2050 Trust Plus EBP, Nonparticipant-Directed Investment [Line Items] EBP, Nonparticipant-Directed Investment [Line Items] EBP, Description of Plan and Accounting Change [Abstract] EBP, Employer Contribution, Matching Percentage tier 2 EBP, Employer Contribution, Matching Percentage tier 2 EBP, Employer Contribution, Matching Percentage tier 2 EBP, Contribution [Abstract] Vanguard Institutional Total Bond Market Index Trust Vanguard Institutional Total Bond Market Index Trust [Member] Vanguard Institutional Total Bond Market Index Trust Vanguard Target Retirement 2045 Trust Plus Vanguard Target Retirement 2045 Trust Plus [Member] Vanguard Target Retirement 2045 Trust Plus EBP, Schedule of Delinquent Participant Contribution [Abstract] Investments [Domain] Investments [Domain] Vanguard Target Retirement 2040 Trust Plus Vanguard Target Retirement 2040 Trust Plus [Member] Vanguard Target Retirement 2040 Trust Plus Vanguard Target Retirement 2070 Trust Plus Vanguard Target Retirement 2070 Trust Plus [Member] Vanguard Target Retirement 2070 Trust Plus EBP, Master Trust [Abstract] Vanguard Developed Market Index Institutional Plus Vanguard Developed Market Index Institutional Plus [Member] Vanguard Developed Market Index Institutional Plus EBP, Schedule of Asset Held for Investment EBP, Schedule of Asset Held for Investment [Text Block] EBP, Related Party and Party-in-Interest [Domain] EBP, Related Party and Party-in-Interest [Domain] Cover [Abstract] BlackRock Total Return Bond Fund; Class M BlackRock Total Return Bond Fund; Class M [Member] BlackRock Total Return Bond Fund; Class M EBP, Change in Net Asset Available for Benefit, Increase from Employer Contribution, Cash EBP, Change in Net Asset Available for Benefit, Increase from Employer Contribution, Cash EBP, Schedule of Delinquent Participant Contribution [Line Items] EBP, Schedule of Delinquent Participant Contribution [Line Items] Minimum Minimum [Member] EBP, Related Party and Party-in-Interest [Axis] EBP, Related Party and Party-in-Interest [Axis] Xcel Energy Stock Fund Xcel Energy Stock Fund [Member] Xcel Energy Stock Fund EBP, Change in Net Asset Available for Benefit, Increase from Interest Income on Note Receivable from Participant EBP, Change in Net Asset Available for Benefit, Increase from Interest Income on Note Receivable from Participant Investment Type [Axis] Investment Type [Axis] EBP, Change in Net Asset Available for Benefit, Increase from Contribution EBP, Change in Net Asset Available for Benefit, Increase from Contribution EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Excluding Rollover EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Excluding Rollover EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Gain (Loss) on Investment EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Gain (Loss) on Investment EBP, Change in Net Asset Available for Benefit, Increase from Interest and Dividend Income on Investment 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, Change in Net Asset Available for Benefit, Increase (Decrease) from Other Investment Income (Loss) EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Other Investment Income (Loss) EBP, Description of Plan EBP, Description of Plan [Text Block] EBP, Investment, Fair Value and NAV [Line Items] EBP, Investment, Fair Value and NAV [Line Items] EBP, Schedule of Delinquent Participant Contribution, Pending Correction in VFCP EBP, Schedule of Delinquent Participant Contribution, Pending Correction in VFCP 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, Schedule of Asset Held for Investment [Line Items] EBP, Schedule of Asset Held for Investment [Line Items] EBP, Change in Net Asset Available for Benefit, Increase from Interest Income on Investment EBP, Change in Net Asset Available for Benefit, Increase from Interest Income on Investment Vanguard Small Cap Index Fund Institutional Plus Shares Vanguard Small Cap Index Fund Institutional Plus Shares [Member] Vanguard Small Cap Index Fund Institutional Plus Shares EBP, Nonconsolidated, Master Trust and Plan Interest in Master Trust [Domain] EBP, Nonconsolidated, Master Trust and Plan Interest in Master Trust [Domain] EBP, Schedule of Asset Held for Investment [Abstract] EBP, Nonparticipant-Directed Investment [Table] EBP, Nonparticipant-Directed Investment [Table] EBP, Accounting Policy [Table] EBP, Accounting Policy [Table] Vanguard Target Retirement 2055 Trust Plus Vanguard Target Retirement 2055 Trust Plus [Member] Vanguard Target Retirement 2055 Trust Plus Vanguard Target Retirement Income and Growth Trust Plus Vanguard Target Retirement Income and Growth Trust Plus [Member] Vanguard Target Retirement Income and Growth Trust Plus Realized and unrealized gain in Xcel Energy Stock Fund, Master Trust Realized and unrealized gain in Xcel Energy Stock Fund, Master Trust Realized and unrealized gain in Xcel Energy Stock Fund, Master Trust Vanguard Federal Money Market Vanguard Federal Money Market [Member] Vanguard Federal Money Market Participant Contribution Maximum Contribution To Eligible Compensation Percentage Participant Contribution Maximum Contribution To Eligible Compensation Percentage Participant Contribution Maximum Contribution To Eligible Compensation Percentage EBP, Change in Net Asset Available for Benefit, Decrease from Administrative Expense EBP, Change in Net Asset Available for Benefit, Decrease from Administrative Expense EBP, Change in Net Asset Available for Benefit, Decrease from Administrative Expense Current Fiscal Year End Date Current Fiscal Year End Date Total Master Trust net income, Master Trust Total Master Trust net income, Master Trust Total Master Trust net income, Master Trust Document Information [Line Items] Document Information [Line Items] EBP, Master Trust EBP, Master Trust [Text Block] EBP, Employer Contribution, Participant Compensation Matched, Percentage EBP, Employer Contribution, Participant Compensation Matched, Percentage EBP, Statement of Change in Net Asset Available for Benefit [Abstract] Fair Value, Inputs, Level 2 Fair Value, Inputs, Level 2 [Member] Measurement Input Type [Domain] Measurement Input Type [Domain] Vanguard Target Retirement Income Trust Plus Vanguard Target Retirement Income Trust Plus [Member] Vanguard Target Retirement Income Trust Plus EBP, Form 5500 Caption, Net Income (Loss) EBP, Form 5500 Caption, Net Income (Loss) EBP, Contribution [Table] EBP, Contribution [Table] EBP, Schedule of Delinquent Participant Contribution, Corrected Outside VFCP EBP, Schedule of Delinquent Participant Contribution, Corrected Outside VFCP EBP, Allocation Status [Domain] EBP, Allocation Status [Domain] Vanguard Target Retirement 2025 Trust Plus Vanguard Target Retirement 2025 Trust Plus [Member] Vanguard Target Retirement 2025 Trust Plus EBP, Tax Status [Table] EBP, Tax Status [Table] EBP, Change in Net Asset Available for Benefit, Increase (Decrease) EBP, Change in Net Asset Available for Benefit, Increase (Decrease) EBP, Related Party and Party-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] EBP, Receivable EBP, Receivable EBP, Employer Contribution, Receivable EBP, Employer Contribution, Receivable EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Unrealized Gain (Loss) on Investment EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Unrealized Gain (Loss) on Investment EBP, Participant Contribution, Automatic, Deferral Rate EBP, Participant Contribution, Automatic, Deferral Rate EBP, Change in Net Asset Available for Benefit, Increase from Dividend Income on Investment EBP, Change in Net Asset Available for Benefit, Increase from Dividend Income on Investment EBP, Change in Net Asset Available for Benefit, Decrease from Payment to Participant EBP, Change in Net Asset Available for Benefit, Decrease from Payment to Participant EBP, Investment, Plan Interest in Master Trust, Fair Value EBP, Investment, Plan Interest in Master Trust, Fair Value 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, Current Value Vanguard Target Retirement 2060 Trust Plus Vanguard Target Retirement 2060 Trust Plus [Member] Vanguard Target Retirement 2060 Trust Plus Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Vanguard Target Retirement 2030 Trust Plus Vanguard Target Retirement 2030 Trust Plus [Member] Vanguard Target Retirement 2030 Trust Plus EBP, Statement of Net Asset Available for Benefit [Abstract] EBP, Accounting Policy [Line Items] EBP, Accounting Policy [Line Items] EBP, Tax Status [Abstract] EBP, Employer, Common Stock Fund EBP, Employer, Common Stock Fund [Member] EBP, Employer Contribution, Participant Compensation Matched, Percentage, tier 2 EBP, Employer Contribution, Participant Compensation Matched, Percentage, tier 2 EBP, Employer Contribution, Participant Compensation Matched, Percentage, tier 2 Document Period End Date Document Period End Date EBP, Reconciliation of Financial Statement to Form 5500 [Table] EBP, Reconciliation of Financial Statement to Form 5500 [Table] EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Change in Plan Interest in Master Trust EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Change in Plan Interest in Master Trust EBP, Reconciliation of Financial Statement to Form 5500 [Line Items] EBP, Reconciliation of Financial Statement to Form 5500 [Line Items] EBP, Plan Name EBP, Plan Name Total interest, dividend and other income, Master Trust Total interest, dividend and other income, Master Trust Total interest, dividend and other income, Master Trust EBP, Reconciliation of Financial Statement to Form 5500 EBP, Reconciliation of Financial Statement to Form 5500 [Text Block] EBP, Asset Held for Investment, Participant Loan, after Deemed Distribution EBP, Asset Held for Investment, Participant Loan, after Deemed Distribution EBP, Master Trust [Table] EBP, Master Trust [Table] EBP, Participant Contribution, Receivable EBP, Participant Contribution, Receivable Document Type Document Type Vanguard PRIMECAP Fund Admiral Shares Vanguard PRIMECAP Fund Admiral Shares [Member] Vanguard PRIMECAP Fund Admiral Shares Entity Central Index Key Entity Central Index Key Valuation Approach and Technique [Axis] Valuation Approach and Technique [Axis] EBP, Asset Held for Investment, Participant Loan, Interest Rate EBP, Asset Held for Investment, Participant Loan, Interest Rate EBP, Reconciliation of Financial Statement to Form 5500 [Abstract] Common Collective Trust Common Collective Trust [Member] EBP, Tax Status [Line Items] EBP, Tax Status [Line Items] EBP, Contribution EBP, Contribution [Text Block] NCE ESSOP EBP 005 [Member] EBP 005 EBP, Note Receivable from Participant EBP, Note Receivable from Participant Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] EBP, Summary of Accounting Policy EBP, Summary of Accounting Policy [Text Block] Entity Registrant Name Entity Registrant Name Document Fiscal Period Focus Document Fiscal Period Focus Employee Benefit Plan Note Receivable From Participant Account Maximum Borrowing Amount Percentage Employee Benefit Plan Note Receivable From Participant Account Maximum Borrowing Amount Percentage Employee Benefit Plan Note Receivable From Participant Account Maximum Borrowing Amount Percentage EBP, Schedule of Delinquent Participant Contribution [Table] EBP, Schedule of Delinquent Participant Contribution [Table] EBP, Schedule of Delinquent Participant Contribution EBP, Schedule of Delinquent Participant Contribution [Text Block] EBP, Participant Contribution, Pretax, Maximum Annual Compensation, Amount EBP, Participant Contribution, Pretax, Maximum Annual Compensation, Amount EBP, Tax Status EBP, Tax Status [Text Block] EBP, Allocation Status [Axis] EBP, Allocation Status [Axis] EBP, Contribution [Line Items] EBP, Contribution [Line Items] Participant Contribution Automatic Annual Increase Deferral Rate Maximum Participant Contribution Automatic Annual Increase Deferral Rate Maximum Participant Contribution Automatic Annual Increase Deferral Rate Maximum EBP, Participant-Directed and Nonparticipant-Directed Status [Domain] EBP, Participant-Directed and Nonparticipant-Directed Status [Domain] EBP, Nonconsolidated, Plan Interest in Master Trust, Approximate Shares EBP, Nonconsolidated, Plan Interest in Master Trust, Approximate Shares EBP, Nonconsolidated, Plan Interest in Master Trust, Approximate Shares EBP, Participant-Directed and Nonparticipant-Directed Status [Axis] EBP, Participant-Directed and Nonparticipant-Directed Status [Axis] Document Information [Table] Document Information [Table] EBP, Note Receivable from Participant EBP, Note Receivable from Participant [Policy Text Block] Vanguard Target Retirement 2035 Trust Plus Vanguard Target Retirement 2035 Trust Plus [Member] Vanguard Target Retirement 2035 Trust Plus 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] Fair Value, Inputs, Level 3 Fair Value, Inputs, Level 3 [Member] EBP, Schedule of Delinquent Participant Contribution, Not Corrected EBP, Schedule of Delinquent Participant Contribution, Not Corrected EBP, Net Asset Available for Benefit EBP, Net Asset Available for Benefit Entity [Domain] Entity [Domain] Self-Directed Brokerage Fund Self-Directed Brokerage Fund [Member] Self-Directed Brokerage Fund EBP, Participant Contribution, Pretax, Maximum Annual Compensation, Catch Up Contributions EBP, Participant Contribution, Pretax, Maximum Annual Compensation, Catch Up Contributions EBP, Participant Contribution, Pretax, Maximum Annual Compensation, Catch Up Contributions EBP, Employer Contribution, Matching Percentage EBP, Employer Contribution, Matching Percentage EBP, Form 5500 Caption, Net Assets EBP, Form 5500 Caption, Net Assets EBP, Investment, Fair Value and NAV [Table] EBP, Investment, Fair Value and NAV [Table] EBP, 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] Vanguard Mid-Cap Index Fund Institutional Plus Shares Vanguard Mid-Cap Index Fund Institutional Plus Shares [Member] Vanguard Mid-Cap Index Fund Institutional Plus Shares