Participant Loan Basis Spread On Variable Rate Participant Loan Basis Spread On Variable Rate Participant Loan Basis Spread On Variable Rate EBP, Master Trust [Abstract] Participant Contribution Automatic Annual Increase Deferral Rate Participant Contribution Automatic Annual Increase Deferral Rate Participant Contribution Automatic Annual Increase Deferral Rate Statistical Measurement [Domain] Statistical Measurement [Domain] EBP, Related Party and Party-in-Interest Transactions EBP, Related Party and Party-in-Interest Transactions [Text Block] 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 Document Information [Line Items] Document Information [Line Items] EBP, Schedule of Delinquent Participant Contribution, Corrected EBP, Schedule of Delinquent Participant Contribution, Corrected EBP, Note Receivable from Participant, Account, Maximum Borrowing, Amount EBP, Note Receivable from Participant, Account, Maximum Borrowing, Amount EBP, Employer, Common Stock Fund EBP, Employer, Common Stock Fund [Member] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] EBP, Participant Contribution, Receivable EBP, Participant Contribution, Receivable EBP, Description of Plan and Accounting Change [Abstract] EBP, Allocation Status [Domain] EBP, Allocation Status [Domain] XCEL 401(k) EBP 003 [Member] EBP 003 Vanguard Target Retirement 2065 Trust Plus Vanguard Target Retirement 2065 Trust Plus [Member] Vanguard Target Retirement 2065 Trust Plus EBP Vested Account Balance at Distribution EBP Vested Account Balance at Distribution EBP Vested Account Balance at Distribution 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 Investment Type [Axis] Investment Type [Axis] EBP, Tax Status EBP, Tax Status [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, Contribution EBP, Contribution [Text Block] EBP, Description of Plan [Line Items] EBP, Description of Plan [Line Items] 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 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 EBP, Master Trust EBP, Master Trust [Text Block] Vanguard Institutional 500 Index Trust Vanguard Institutional 500 Index Trust [Member] Vanguard Institutional 500 Index Trust 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 Vanguard Institutional Extended Market Index Trust Vanguard Institutional Extended Market Index Trust [Member] Vanguard Institutional Extended Market Index Trust EBP, Schedule of Asset Held for Investment [Table] EBP, Schedule of Asset Held for Investment [Table] EBP, Asset Held for Investment, Participant Loan, after Deemed Distribution EBP, Asset Held for Investment, Participant Loan, after Deemed Distribution EBP, Form 5500 Caption, Net Assets EBP, Form 5500 Caption, Net Assets EBP, Investment, Fair Value and NAV EBP, Investment, Fair Value and NAV [Text Block] 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, Investment, Fair Value and NAV [Table] EBP, Investment, Fair Value and NAV [Table] EBP, Schedule of Delinquent Participant Contribution, Corrected Outside VFCP EBP, Schedule of Delinquent Participant Contribution, Corrected Outside VFCP 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, 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 Vanguard Target Retirement 2050 Trust Plus Vanguard Target Retirement 2050 Trust Plus [Member] Vanguard Target Retirement 2050 Trust Plus EBP, Change in Net Asset Available for Benefit, Increase from Contribution EBP, Change in Net Asset Available for Benefit, Increase from Contribution EBP, Form 5500 Caption, Net Income (Loss) EBP, Form 5500 Caption, Net Income (Loss) EBP, Note Receivable from Participant, Account, Minimum Borrowing, Amount EBP, Note Receivable from Participant, Account, Minimum Borrowing, Amount Vanguard Institutional Total Bond Market Index Trust Vanguard Institutional Total Bond Market Index Trust [Member] Vanguard Institutional Total Bond Market Index Trust EBP, Related Party and Party-in-Interest Transactions [Table] EBP, Related Party and Party-in-Interest Transactions [Table] Money Market Funds Money Market Funds [Member] Vanguard Target Retirement 2045 Trust Plus Vanguard Target Retirement 2045 Trust Plus [Member] Vanguard Target Retirement 2045 Trust Plus 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, Employer Contribution, Receivable EBP, Employer Contribution, Receivable 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, Investment, Fair Value EBP, Investment, Fair Value Participant Contribution Automatic Requisite Service Period Participant Contribution Automatic Requisite Service Period Participant Contribution Automatic Requisite Service Period 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, Nonconsolidated, Master Trust and Plan Interest in Master Trust [Axis] EBP, Nonconsolidated, Master Trust and Plan Interest in Master Trust [Axis] Vanguard Developed Market Index Institutional Plus Vanguard Developed Market Index Institutional Plus [Member] Vanguard Developed Market Index Institutional Plus EBP, Participant-Directed and Nonparticipant-Directed Status [Domain] EBP, Participant-Directed and Nonparticipant-Directed Status [Domain] EBP, Net Asset Available for Benefit EBP, Net Asset Available for Benefit BlackRock Total Return Bond Fund; Class M BlackRock Total Return Bond Fund; Class M [Member] BlackRock Total Return Bond Fund; Class M EBP, Reconciliation of Financial Statement to Form 5500 [Line Items] EBP, Reconciliation of Financial Statement to Form 5500 [Line Items] EBP, Accounting Policy [Line Items] EBP, Accounting Policy [Line Items] EBP, Schedule of Asset Held for Investment [Line Items] EBP, Schedule of Asset Held for Investment [Line Items] Xcel Energy Stock Fund Xcel Energy Stock Fund [Member] Xcel Energy Stock Fund EBP, Schedule of Delinquent Participant Contribution [Abstract] EBP, Reconciliation to Form 5500, Note Receivable, Deemed Distribution EBP, Reconciliation to Form 5500, Note Receivable, Deemed Distribution EBP, Investment, Plan Interest in Master Trust, Fair Value EBP, Investment, Plan Interest in Master Trust, Fair Value EBP, Reconciliation of Financial Statement to Form 5500 [Table] EBP, Reconciliation of Financial Statement to Form 5500 [Table] EBP, Participant Contribution, Pretax, Maximum Annual Compensation, Amount EBP, Participant Contribution, Pretax, Maximum Annual Compensation, Amount EBP, Participant Contribution, Automatic, Deferral Rate EBP, Participant Contribution, Automatic, Deferral Rate Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] EBP, Tax Status [Abstract] EBP, Change in Net Asset Available for Benefit, Increase (Decrease) EBP, Change in Net Asset Available for Benefit, Increase (Decrease) Cover [Abstract] 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 Maximum Maximum [Member] 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, Pending Correction in VFCP EBP, Schedule of Delinquent Participant Contribution, Pending Correction in VFCP Vanguard Target Retirement 2055 Trust Plus Vanguard Target Retirement 2055 Trust Plus [Member] Vanguard Target Retirement 2055 Trust Plus Minimum Minimum [Member] Current Fiscal Year End Date Current Fiscal Year End Date 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 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, Schedule of Asset Held for Investment [Abstract] Vanguard Federal Money Market Vanguard Federal Money Market [Member] Vanguard Federal Money Market EBP, Master Trust [Table] EBP, Master Trust [Table] Entities [Table] Entities [Table] 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, Reconciliation of Financial Statement to Form 5500 EBP, Reconciliation of Financial Statement to Form 5500 [Text Block] Entity [Domain] Entity [Domain] EBP, Schedule of Delinquent Participant Contribution EBP, Schedule of Delinquent Participant Contribution [Table Text Block] Total Master Trust net income, Master Trust Total Master Trust net income, Master Trust Total Master Trust net income, Master Trust EBP, Schedule of Delinquent Participant Contribution, Not Corrected EBP, Schedule of Delinquent Participant Contribution, Not Corrected Document Fiscal Year Focus Document Fiscal Year Focus EBP, Allocation Status [Axis] EBP, Allocation Status [Axis] EBP, Investment, Fair Value and NAV [Abstract] EBP, Schedule of Delinquent Participant Contribution [Line Items] EBP, Schedule of Delinquent Participant Contribution [Line Items] EBP, Employer Contribution, Matching Percentage EBP, Employer Contribution, Matching Percentage EBP, Tax Status [Line Items] EBP, Tax Status [Line Items] EBP, Statement of Change in Net Asset Available for Benefit [Table] EBP, Statement of Change in Net Asset Available for Benefit [Table] Mutual Fund Mutual Fund [Member] EBP, Description of Plan [Table] EBP, Description of Plan [Table] EBP, Reconciliation of Financial Statement to Form 5500 [Abstract] Amendment Flag Amendment Flag Vanguard Target Retirement Income Trust Plus Vanguard Target Retirement Income Trust Plus [Member] Vanguard Target Retirement Income Trust Plus 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 Common Collective Trust Common Collective Trust [Member] 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 Target Retirement 2025 Trust Plus Vanguard Target Retirement 2025 Trust Plus [Member] Vanguard Target Retirement 2025 Trust Plus EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value EBP, Statement of Change in Net Asset Available for Benefit [Abstract] EBP, Related Party and Party-in-Interest Transactions [Abstract] EBP, Forfeited Nonvested Account EBP, Forfeited Nonvested Account EBP, Related Party and Party-in-Interest Transactions [Line Items] EBP, Related Party and Party-in-Interest Transactions [Line Items] EBP, Contribution [Abstract] Vanguard Target Retirement 2060 Trust Plus Vanguard Target Retirement 2060 Trust Plus [Member] Vanguard Target Retirement 2060 Trust Plus EBP, Contribution [Line Items] EBP, Contribution [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) 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] Document Fiscal Period Focus Document Fiscal Period Focus EBP, Description of Plan EBP, Description of Plan [Text Block] EBP, Summary of Accounting Policy EBP, Summary of Accounting Policy [Text Block] Document Period End Date Document Period End Date EBP, Note Receivable from Participant EBP, Note Receivable from Participant [Policy Text Block] EBP, Statement of Net Asset Available for Benefit [Line Items] EBP, Statement of Net Asset Available for Benefit [Line Items] EBP, Participant-Directed and Nonparticipant-Directed Status [Axis] EBP, Participant-Directed and Nonparticipant-Directed Status [Axis] Entity Central Index Key Entity Central Index Key EBP, Asset Held for Investment, Participant Loan, Interest Rate EBP, Asset Held for Investment, Participant Loan, Interest Rate EBP, Investment, Excluding Plan Interest in Master Trust, Fair Value EBP, Investment, Excluding Plan Interest in Master Trust, Fair Value Legal Entity [Axis] Legal Entity [Axis] EBP, Accounting Policy, Accounting Standard Update, and Change in Accounting Principle [Abstract] 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, Plan Name EBP, Plan Name Vanguard PRIMECAP Fund Admiral Shares Vanguard PRIMECAP Fund Admiral Shares [Member] Vanguard PRIMECAP Fund Admiral Shares 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 Document Type Document Type Fair Value, Inputs, Level 3 Fair Value, Inputs, Level 3 [Member] EBP, Statement of Net Asset Available for Benefit [Table] EBP, Statement of Net Asset Available for Benefit [Table] EBP, Investment, Fair Value and NAV [Line Items] EBP, Investment, Fair Value and NAV [Line Items] EBP, Contribution [Table] EBP, Contribution [Table] EBP, Interest in Master Trust, Percentage EBP, Interest in Master Trust, Percentage Statistical Measurement [Axis] Statistical Measurement [Axis] EBP, Master Trust [Line Items] EBP, Master Trust [Line Items] 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, Note Receivable from Participant EBP, Note Receivable from Participant Fair Value, Inputs, Level 2 Fair Value, Inputs, Level 2 [Member] EBP, Schedule of Asset Held for Investment EBP, Schedule of Asset Held for Investment [Table Text Block] EBP, Related Party and Party-in-Interest [Axis] EBP, Related Party and Party-in-Interest [Axis] EBP, Related Party and Party-in-Interest [Domain] EBP, Related Party and Party-in-Interest [Domain] 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 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, 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, Accounting Policy [Table] EBP, Accounting Policy [Table] Investments [Domain] Investments [Domain] Entity Information [Line Items] Entity Information [Line Items] EBP, Self-Directed Brokerage Account EBP, Self-Directed Brokerage Account [Member] Document Information [Table] Document Information [Table] Vanguard Target Retirement 2035 Trust Plus Vanguard Target Retirement 2035 Trust Plus [Member] Vanguard Target Retirement 2035 Trust Plus EBP, Statement of Change in Net Asset Available for Benefit [Line Items] EBP, Statement of Change in Net Asset Available for Benefit [Line Items] Fair Value, Inputs, Level 1 Fair Value, Inputs, Level 1 [Member] Entity Registrant Name Entity Registrant Name 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 Self-Directed Brokerage Fund Self-Directed Brokerage Fund [Member] Self-Directed Brokerage Fund EBP, Tax Status [Table] EBP, Tax Status [Table] EBP, Schedule of Delinquent Participant Contribution [Table] EBP, Schedule of Delinquent Participant Contribution [Table] EBP, Receivable EBP, Receivable EBP, Employer Contribution, Participant Compensation Matched, Percentage EBP, Employer Contribution, Participant Compensation Matched, Percentage 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