v3.26.3
Interest Rate Derivatives (Details) - USD ($)
$ in Millions
Sep. 30, 2026
Dec. 31, 2025
Derivative [Line Items]    
Derivative Liability, Noncurrent $ 52 $ 67
Derivative Liability, Current 27 31
Fair Value, Measured on a Recurring Basis    
Derivative [Line Items]    
Derivative Asset, Current 148 165
Derivative Asset, Noncurrent 43 54
Derivative Liability, Noncurrent 47 57
Derivative Liability, Current 21 25
Fair Value, Measured on a Recurring Basis | Balance Sheet Location [Axis]: us-gaap:DerivativeInstrumentsAndHedges    
Derivative [Line Items]    
Derivative Asset, Gross 165 184
Netting [1] (17) (19)
Fair Value, Measured on a Recurring Basis | Balance Sheet Location [Axis]: us-gaap:DerivativeInstrumentsAndHedgesLiabilities    
Derivative [Line Items]    
Derivative Liability, Gross 38 46
Netting [1] 17 21
Fair Value, Measured on a Recurring Basis | Balance Sheet Location [Axis]: us-gaap:DerivativeInstrumentsAndHedgesLiabilitiesNoncurrent    
Derivative [Line Items]    
Derivative Liability, Gross 54 70
Netting [1] 7 13
Fair Value, Measured on a Recurring Basis | Balance Sheet Location [Axis]: us-gaap:DerivativeInstrumentsAndHedgesNoncurrent    
Derivative [Line Items]    
Derivative Asset, Gross 49 65
Netting [1] (6) (11)
Level 1 | Fair Value, Measured on a Recurring Basis | Balance Sheet Location [Axis]: us-gaap:DerivativeInstrumentsAndHedges    
Derivative [Line Items]    
Derivative Asset, Gross 10 2
Level 1 | Fair Value, Measured on a Recurring Basis | Balance Sheet Location [Axis]: us-gaap:DerivativeInstrumentsAndHedgesLiabilities    
Derivative [Line Items]    
Derivative Liability, Gross 11 5
Level 1 | Fair Value, Measured on a Recurring Basis | Balance Sheet Location [Axis]: us-gaap:DerivativeInstrumentsAndHedgesLiabilitiesNoncurrent    
Derivative [Line Items]    
Derivative Liability, Gross 3 6
Level 1 | Fair Value, Measured on a Recurring Basis | Balance Sheet Location [Axis]: us-gaap:DerivativeInstrumentsAndHedgesNoncurrent    
Derivative [Line Items]    
Derivative Asset, Gross 2 3
Level 2 | Fair Value, Measured on a Recurring Basis | Balance Sheet Location [Axis]: us-gaap:DerivativeInstrumentsAndHedges    
Derivative [Line Items]    
Derivative Asset, Gross 34 28
Level 2 | Fair Value, Measured on a Recurring Basis | Balance Sheet Location [Axis]: us-gaap:DerivativeInstrumentsAndHedgesLiabilities    
Derivative [Line Items]    
Derivative Liability, Gross 18 32
Level 2 | Fair Value, Measured on a Recurring Basis | Balance Sheet Location [Axis]: us-gaap:DerivativeInstrumentsAndHedgesLiabilitiesNoncurrent    
Derivative [Line Items]    
Derivative Liability, Gross 18 24
Level 2 | Fair Value, Measured on a Recurring Basis | Balance Sheet Location [Axis]: us-gaap:DerivativeInstrumentsAndHedgesNoncurrent    
Derivative [Line Items]    
Derivative Asset, Gross 32 28
Level 3 | Fair Value, Measured on a Recurring Basis | Balance Sheet Location [Axis]: us-gaap:DerivativeInstrumentsAndHedges    
Derivative [Line Items]    
Derivative Asset, Gross 121 154
Level 3 | Fair Value, Measured on a Recurring Basis | Balance Sheet Location [Axis]: us-gaap:DerivativeInstrumentsAndHedgesLiabilities    
Derivative [Line Items]    
Derivative Liability, Gross 9 9
Level 3 | Fair Value, Measured on a Recurring Basis | Balance Sheet Location [Axis]: us-gaap:DerivativeInstrumentsAndHedgesLiabilitiesNoncurrent    
Derivative [Line Items]    
Derivative Liability, Gross 33 40
Level 3 | Fair Value, Measured on a Recurring Basis | Balance Sheet Location [Axis]: us-gaap:DerivativeInstrumentsAndHedgesNoncurrent    
Derivative [Line Items]    
Derivative Asset, Gross 15 34
Commodity Trading | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments    
Derivative [Line Items]    
Derivative Asset, Current 4 6
Derivative Asset, Noncurrent 43 54
Derivative Liability, Noncurrent 47 57
Derivative Liability, Current 14 15
Commodity Trading | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments | Balance Sheet Location [Axis]: us-gaap:DerivativeInstrumentsAndHedges    
Derivative [Line Items]    
Derivative Asset, Gross 19 22
Netting [1] (15) (16)
Commodity Trading | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments | Balance Sheet Location [Axis]: us-gaap:DerivativeInstrumentsAndHedgesLiabilities    
Derivative [Line Items]    
Derivative Liability, Gross 30 33
Netting [1] 16 18
Commodity Trading | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments | Balance Sheet Location [Axis]: us-gaap:DerivativeInstrumentsAndHedgesLiabilitiesNoncurrent    
Derivative [Line Items]    
Derivative Liability, Gross 54 70
Netting [1] 7 13
Commodity Trading | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments | Balance Sheet Location [Axis]: us-gaap:DerivativeInstrumentsAndHedgesNoncurrent    
Derivative [Line Items]    
Derivative Asset, Gross 49 65
Netting [1] (6) (11)
Commodity Trading | Level 1 | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments | Balance Sheet Location [Axis]: us-gaap:DerivativeInstrumentsAndHedges    
Derivative [Line Items]    
Derivative Asset, Gross 10 2
Commodity Trading | Level 1 | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments | Balance Sheet Location [Axis]: us-gaap:DerivativeInstrumentsAndHedgesLiabilities    
Derivative [Line Items]    
Derivative Liability, Gross 11 5
Commodity Trading | Level 1 | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments | Balance Sheet Location [Axis]: us-gaap:DerivativeInstrumentsAndHedgesLiabilitiesNoncurrent    
Derivative [Line Items]    
Derivative Liability, Gross 3 6
Commodity Trading | Level 1 | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments | Balance Sheet Location [Axis]: us-gaap:DerivativeInstrumentsAndHedgesNoncurrent    
Derivative [Line Items]    
Derivative Asset, Gross 2 3
Commodity Trading | Level 2 | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments | Balance Sheet Location [Axis]: us-gaap:DerivativeInstrumentsAndHedges    
Derivative [Line Items]    
Derivative Asset, Gross 5 13
Commodity Trading | Level 2 | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments | Balance Sheet Location [Axis]: us-gaap:DerivativeInstrumentsAndHedgesLiabilities    
Derivative [Line Items]    
Derivative Liability, Gross 11 22
Commodity Trading | Level 2 | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments | Balance Sheet Location [Axis]: us-gaap:DerivativeInstrumentsAndHedgesLiabilitiesNoncurrent    
Derivative [Line Items]    
Derivative Liability, Gross 18 24
Commodity Trading | Level 2 | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments | Balance Sheet Location [Axis]: us-gaap:DerivativeInstrumentsAndHedgesNoncurrent    
Derivative [Line Items]    
Derivative Asset, Gross 32 28
Commodity Trading | Level 3 | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments | Balance Sheet Location [Axis]: us-gaap:DerivativeInstrumentsAndHedges    
Derivative [Line Items]    
Derivative Asset, Gross 4 7
Commodity Trading | Level 3 | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments | Balance Sheet Location [Axis]: us-gaap:DerivativeInstrumentsAndHedgesLiabilities    
Derivative [Line Items]    
Derivative Liability, Gross 8 6
Commodity Trading | Level 3 | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments | Balance Sheet Location [Axis]: us-gaap:DerivativeInstrumentsAndHedgesLiabilitiesNoncurrent    
Derivative [Line Items]    
Derivative Liability, Gross 33 40
Commodity Trading | Level 3 | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments | Balance Sheet Location [Axis]: us-gaap:DerivativeInstrumentsAndHedgesNoncurrent    
Derivative [Line Items]    
Derivative Asset, Gross 15 34
Electric Commodity | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments    
Derivative [Line Items]    
Derivative Asset, Current 115 144
Derivative Liability, Current 0 0
Electric Commodity | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments | Balance Sheet Location [Axis]: us-gaap:DerivativeInstrumentsAndHedges    
Derivative [Line Items]    
Derivative Asset, Gross 117 147
Netting [1] (2) (3)
Electric Commodity | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments | Balance Sheet Location [Axis]: us-gaap:DerivativeInstrumentsAndHedgesLiabilities    
Derivative [Line Items]    
Derivative Liability, Gross 1 3
Netting [1] 1 3
Electric Commodity | Level 1 | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments | Balance Sheet Location [Axis]: us-gaap:DerivativeInstrumentsAndHedges    
Derivative [Line Items]    
Derivative Asset, Gross 0 0
Electric Commodity | Level 1 | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments | Balance Sheet Location [Axis]: us-gaap:DerivativeInstrumentsAndHedgesLiabilities    
Derivative [Line Items]    
Derivative Liability, Gross 0 0
Electric Commodity | Level 2 | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments | Balance Sheet Location [Axis]: us-gaap:DerivativeInstrumentsAndHedges    
Derivative [Line Items]    
Derivative Asset, Gross 0 0
Electric Commodity | Level 2 | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments | Balance Sheet Location [Axis]: us-gaap:DerivativeInstrumentsAndHedgesLiabilities    
Derivative [Line Items]    
Derivative Liability, Gross 0 0
Electric Commodity | Level 3 | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments | Balance Sheet Location [Axis]: us-gaap:DerivativeInstrumentsAndHedges    
Derivative [Line Items]    
Derivative Asset, Gross 117 147
Electric Commodity | Level 3 | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments | Balance Sheet Location [Axis]: us-gaap:DerivativeInstrumentsAndHedgesLiabilities    
Derivative [Line Items]    
Derivative Liability, Gross 1 3
Interest Rate Swap    
Derivative [Line Items]    
Derivative Liability, Notional Amount 130  
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net 2  
Interest Rate Swap | Fair Value, Measured on a Recurring Basis | Designated as Hedging Instrument    
Derivative [Line Items]    
Derivative Asset, Current 13 1
Interest Rate Swap | Fair Value, Measured on a Recurring Basis | Designated as Hedging Instrument | Balance Sheet Location [Axis]: us-gaap:DerivativeInstrumentsAndHedges    
Derivative [Line Items]    
Netting [1] 0 0
Interest Rate Swap | Fair Value, Measured on a Recurring Basis | Designated as Hedging Instrument | Balance Sheet Location [Axis]: us-gaap:DerivativeInstrumentsAndHedges | Cash Flow Hedges    
Derivative [Line Items]    
Derivative Asset, Gross 13 1
Interest Rate Swap | Level 1 | Fair Value, Measured on a Recurring Basis | Designated as Hedging Instrument | Balance Sheet Location [Axis]: us-gaap:DerivativeInstrumentsAndHedges | Cash Flow Hedges    
Derivative [Line Items]    
Derivative Asset, Gross 0 0
Interest Rate Swap | Level 2 | Fair Value, Measured on a Recurring Basis | Designated as Hedging Instrument | Balance Sheet Location [Axis]: us-gaap:DerivativeInstrumentsAndHedges | Cash Flow Hedges    
Derivative [Line Items]    
Derivative Asset, Gross 13 1
Interest Rate Swap | Level 3 | Fair Value, Measured on a Recurring Basis | Designated as Hedging Instrument | Balance Sheet Location [Axis]: us-gaap:DerivativeInstrumentsAndHedges | Cash Flow Hedges    
Derivative [Line Items]    
Derivative Asset, Gross 0 0
PPAs | Fair Value, Measurements, Nonrecurring    
Derivative [Line Items]    
Derivative Liability, Noncurrent [2] 5 10
Derivative Liability, Current [2] 6 6
Natural Gas Commodity | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments    
Derivative [Line Items]    
Derivative Asset, Current 16 14
Derivative Liability, Current 7 10
Natural Gas Commodity | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments | Balance Sheet Location [Axis]: us-gaap:DerivativeInstrumentsAndHedges    
Derivative [Line Items]    
Derivative Asset, Gross 16 14
Netting [1] 0 0
Natural Gas Commodity | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments | Balance Sheet Location [Axis]: us-gaap:DerivativeInstrumentsAndHedgesLiabilities    
Derivative [Line Items]    
Derivative Liability, Gross 7 10
Netting [1] 0 0
Natural Gas Commodity | Level 1 | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments | Balance Sheet Location [Axis]: us-gaap:DerivativeInstrumentsAndHedges    
Derivative [Line Items]    
Derivative Asset, Gross 0 0
Natural Gas Commodity | Level 1 | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments | Balance Sheet Location [Axis]: us-gaap:DerivativeInstrumentsAndHedgesLiabilities    
Derivative [Line Items]    
Derivative Liability, Gross 0 0
Natural Gas Commodity | Level 2 | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments | Balance Sheet Location [Axis]: us-gaap:DerivativeInstrumentsAndHedges    
Derivative [Line Items]    
Derivative Asset, Gross 16 14
Natural Gas Commodity | Level 2 | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments | Balance Sheet Location [Axis]: us-gaap:DerivativeInstrumentsAndHedgesLiabilities    
Derivative [Line Items]    
Derivative Liability, Gross 7 10
Natural Gas Commodity | Level 3 | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments | Balance Sheet Location [Axis]: us-gaap:DerivativeInstrumentsAndHedges    
Derivative [Line Items]    
Derivative Asset, Gross 0 0
Natural Gas Commodity | Level 3 | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments | Balance Sheet Location [Axis]: us-gaap:DerivativeInstrumentsAndHedgesLiabilities    
Derivative [Line Items]    
Derivative Liability, Gross $ 0 $ 0
[1] Xcel Energy nets derivative instruments and related collateral on its consolidated balance sheets when supported by a legally enforceable master netting agreement. At Sept. 30, 2026 and Dec. 31, 2025, derivative assets and liabilities include no obligations to return cash collateral. At Sept. 30, 2026 and Dec. 31, 2025, derivative assets and liabilities include rights to reclaim cash collateral of $1 million and $4 million, respectively. Counterparty netting amounts presented exclude settlement receivables and payables and non-derivative amounts that may be subject to the same master netting agreements.
[2] Xcel Energy currently applies the normal purchase exception to qualifying PPAs. Balance relates to specific contracts that were previously recognized at fair value prior to applying the normal purchase exception, and are being amortized over the remaining contract lives along with the offsetting regulatory assets and liabilities.