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Schedule II, Valuation and Qualifying Accounts SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts (Tables)
 12 Months Ended
Dec. 31, 2023
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]  
SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]
Xcel Energy Inc. and Subsidiaries Valuation and Qualifying Accounts Years Ended Dec. 31
Allowance for bad debtsNOL and tax credit valuation allowances
(Millions of Dollars)202320222021202320222021
Balance at Jan. 1$122 $106 $79 $62 $64 $64 
Additions charged to costs and expenses79 73 60 26 6 5 
Additions charged to other accounts13 
(a)
26 
(a)
14 
(a)
— — — 
Deductions from reserves(86)
(b)
(83)
(b)
(47)
(b)
(18)
(c)
(8)
(c)
(5)
(c)
Balance at Dec. 31$128 $122 $106 $70 $62 $64 
(a)Recovery of amounts previously written-off.
(b)Deductions related primarily to bad debt write-offs.
(c)Primarily reversals of valuation allowances on completed tax credit sales and reductions of valuation allowances for items forecasted to be used prior to expiration.