Borrowings and Other Financing Instruments Borrowings Phantom (Details)	Dec. 31, 2019
Xcel Energy Inc. \| Revolving Credit Facility [Member]
Short-term Debt [Line Items]
Line Of Credit Facility Maximum Debt To Total Capitalization Ratio Allowed	65.00%

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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