v3.26.1
Interest Rate Derivatives (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Derivative [Line Items]    
Derivative Liability, Noncurrent $ 51 $ 67
Derivative Liability, Current 17 31
Fair Value, Measured on a Recurring Basis    
Derivative [Line Items]    
Derivative Asset, Current 178 165
Derivative Asset, Noncurrent 44 54
Derivative Liability, Noncurrent 45 57
Derivative Liability, Current 11 25
Fair Value, Measured on a Recurring Basis | Balance Sheet Location [Axis]: us-gaap:OtherAssetsCurrent    
Derivative [Line Items]    
Derivative Asset, Gross 190 184
Netting [1] (12) (19)
Fair Value, Measured on a Recurring Basis | Balance Sheet Location [Axis]: us-gaap:OtherAssetsNoncurrent    
Derivative [Line Items]    
Derivative Asset, Gross 51 65
Netting [1] (7) (11)
Fair Value, Measured on a Recurring Basis | Balance Sheet Location [Axis]: us-gaap:OtherLiabilitiesCurrent    
Derivative [Line Items]    
Derivative Liability, Gross 29 46
Netting [1] 18 21
Fair Value, Measured on a Recurring Basis | Balance Sheet Location [Axis]: us-gaap:OtherLiabilitiesNoncurrent    
Derivative [Line Items]    
Derivative Liability, Gross 56 70
Netting [1] 11 13
Level 1 | Fair Value, Measured on a Recurring Basis | Balance Sheet Location [Axis]: us-gaap:OtherAssetsCurrent    
Derivative [Line Items]    
Derivative Asset, Gross 3 2
Level 1 | Fair Value, Measured on a Recurring Basis | Balance Sheet Location [Axis]: us-gaap:OtherAssetsNoncurrent    
Derivative [Line Items]    
Derivative Asset, Gross 3 3
Level 1 | Fair Value, Measured on a Recurring Basis | Balance Sheet Location [Axis]: us-gaap:OtherLiabilitiesCurrent    
Derivative [Line Items]    
Derivative Liability, Gross 3 5
Level 1 | Fair Value, Measured on a Recurring Basis | Balance Sheet Location [Axis]: us-gaap:OtherLiabilitiesNoncurrent    
Derivative [Line Items]    
Derivative Liability, Gross 5 6
Level 2 | Fair Value, Measured on a Recurring Basis | Balance Sheet Location [Axis]: us-gaap:OtherAssetsCurrent    
Derivative [Line Items]    
Derivative Asset, Gross 11 28
Level 2 | Fair Value, Measured on a Recurring Basis | Balance Sheet Location [Axis]: us-gaap:OtherAssetsNoncurrent    
Derivative [Line Items]    
Derivative Asset, Gross 29 28
Level 2 | Fair Value, Measured on a Recurring Basis | Balance Sheet Location [Axis]: us-gaap:OtherLiabilitiesCurrent    
Derivative [Line Items]    
Derivative Liability, Gross 13 32
Level 2 | Fair Value, Measured on a Recurring Basis | Balance Sheet Location [Axis]: us-gaap:OtherLiabilitiesNoncurrent    
Derivative [Line Items]    
Derivative Liability, Gross 21 24
Level 3 | Fair Value, Measured on a Recurring Basis | Balance Sheet Location [Axis]: us-gaap:OtherAssetsCurrent    
Derivative [Line Items]    
Derivative Asset, Gross 176 154
Level 3 | Fair Value, Measured on a Recurring Basis | Balance Sheet Location [Axis]: us-gaap:OtherAssetsNoncurrent    
Derivative [Line Items]    
Derivative Asset, Gross 19 34
Level 3 | Fair Value, Measured on a Recurring Basis | Balance Sheet Location [Axis]: us-gaap:OtherLiabilitiesCurrent    
Derivative [Line Items]    
Derivative Liability, Gross 13 9
Level 3 | Fair Value, Measured on a Recurring Basis | Balance Sheet Location [Axis]: us-gaap:OtherLiabilitiesNoncurrent    
Derivative [Line Items]    
Derivative Liability, Gross 30 40
Commodity Trading | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments    
Derivative [Line Items]    
Derivative Asset, Current 4 6
Derivative Asset, Noncurrent 44 54
Derivative Liability, Noncurrent 45 57
Derivative Liability, Current 11 15
Commodity Trading | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments | Balance Sheet Location [Axis]: us-gaap:OtherAssetsCurrent    
Derivative [Line Items]    
Derivative Asset, Gross 14 22
Netting [1] (10) (16)
Commodity Trading | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments | Balance Sheet Location [Axis]: us-gaap:OtherAssetsNoncurrent    
Derivative [Line Items]    
Derivative Asset, Gross 51 65
Netting [1] (7) (11)
Commodity Trading | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments | Balance Sheet Location [Axis]: us-gaap:OtherLiabilitiesCurrent    
Derivative [Line Items]    
Derivative Liability, Gross 27 33
Netting [1] 16 18
Commodity Trading | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments | Balance Sheet Location [Axis]: us-gaap:OtherLiabilitiesNoncurrent    
Derivative [Line Items]    
Derivative Liability, Gross 56 70
Netting [1] 11 13
Commodity Trading | Level 1 | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments | Balance Sheet Location [Axis]: us-gaap:OtherAssetsCurrent    
Derivative [Line Items]    
Derivative Asset, Gross 3 2
Commodity Trading | Level 1 | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments | Balance Sheet Location [Axis]: us-gaap:OtherAssetsNoncurrent    
Derivative [Line Items]    
Derivative Asset, Gross 3 3
Commodity Trading | Level 1 | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments | Balance Sheet Location [Axis]: us-gaap:OtherLiabilitiesCurrent    
Derivative [Line Items]    
Derivative Liability, Gross 3 5
Commodity Trading | Level 1 | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments | Balance Sheet Location [Axis]: us-gaap:OtherLiabilitiesNoncurrent    
Derivative [Line Items]    
Derivative Liability, Gross 5 6
Commodity Trading | Level 2 | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments | Balance Sheet Location [Axis]: us-gaap:OtherAssetsCurrent    
Derivative [Line Items]    
Derivative Asset, Gross 6 13
Commodity Trading | Level 2 | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments | Balance Sheet Location [Axis]: us-gaap:OtherAssetsNoncurrent    
Derivative [Line Items]    
Derivative Asset, Gross 29 28
Commodity Trading | Level 2 | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments | Balance Sheet Location [Axis]: us-gaap:OtherLiabilitiesCurrent    
Derivative [Line Items]    
Derivative Liability, Gross 13 22
Commodity Trading | Level 2 | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments | Balance Sheet Location [Axis]: us-gaap:OtherLiabilitiesNoncurrent    
Derivative [Line Items]    
Derivative Liability, Gross 21 24
Commodity Trading | Level 3 | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments | Balance Sheet Location [Axis]: us-gaap:OtherAssetsCurrent    
Derivative [Line Items]    
Derivative Asset, Gross 5 7
Commodity Trading | Level 3 | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments | Balance Sheet Location [Axis]: us-gaap:OtherAssetsNoncurrent    
Derivative [Line Items]    
Derivative Asset, Gross 19 34
Commodity Trading | Level 3 | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments | Balance Sheet Location [Axis]: us-gaap:OtherLiabilitiesCurrent    
Derivative [Line Items]    
Derivative Liability, Gross 11 6
Commodity Trading | Level 3 | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments | Balance Sheet Location [Axis]: us-gaap:OtherLiabilitiesNoncurrent    
Derivative [Line Items]    
Derivative Liability, Gross 30 40
Electric Commodity | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments    
Derivative [Line Items]    
Derivative Asset, Current 169 144
Derivative Liability, Gross 2 3
Netting [1] 2 3
Derivative Liability, Current 0 0
Electric Commodity | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments | Balance Sheet Location [Axis]: us-gaap:OtherAssetsCurrent    
Derivative [Line Items]    
Derivative Asset, Gross 171 147
Netting [1] (2) (3)
Electric Commodity | Level 1 | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments    
Derivative [Line Items]    
Derivative Liability, Gross 0 0
Electric Commodity | Level 1 | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments | Balance Sheet Location [Axis]: us-gaap:OtherAssetsCurrent    
Derivative [Line Items]    
Derivative Asset, Gross 0 0
Electric Commodity | Level 2 | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments    
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:OtherAssetsCurrent    
Derivative [Line Items]    
Derivative Asset, Gross 0 0
Electric Commodity | Level 3 | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments    
Derivative [Line Items]    
Derivative Liability, Gross 2 3
Electric Commodity | Level 3 | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments | Balance Sheet Location [Axis]: us-gaap:OtherAssetsCurrent    
Derivative [Line Items]    
Derivative Asset, Gross 171 147
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 3  
Interest Rate Swap | Fair Value, Measured on a Recurring Basis | Designated as Hedging Instrument    
Derivative [Line Items]    
Derivative Asset, Current 4 1
Interest Rate Swap | Fair Value, Measured on a Recurring Basis | Designated as Hedging Instrument | Balance Sheet Location [Axis]: us-gaap:OtherAssetsCurrent    
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:OtherAssetsCurrent | Cash Flow Hedges    
Derivative [Line Items]    
Derivative Asset, Gross 4 1
Interest Rate Swap | Level 1 | Fair Value, Measured on a Recurring Basis | Designated as Hedging Instrument | Balance Sheet Location [Axis]: us-gaap:OtherAssetsCurrent | 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:OtherAssetsCurrent | Cash Flow Hedges    
Derivative [Line Items]    
Derivative Asset, Gross 4 1
Interest Rate Swap | Level 3 | Fair Value, Measured on a Recurring Basis | Designated as Hedging Instrument | Balance Sheet Location [Axis]: us-gaap:OtherAssetsCurrent | Cash Flow Hedges    
Derivative [Line Items]    
Derivative Asset, Gross 0 0
PPAs | Fair Value, Measurements, Nonrecurring    
Derivative [Line Items]    
Derivative Liability, Noncurrent [2] 6 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 1 14
Derivative Liability, Gross 0 10
Netting [1] 0 0
Derivative Liability, Current 0 10
Natural Gas Commodity | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments | Balance Sheet Location [Axis]: us-gaap:OtherAssetsCurrent    
Derivative [Line Items]    
Derivative Asset, Gross 1 14
Netting [1] 0 0
Natural Gas Commodity | Level 1 | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments    
Derivative [Line Items]    
Derivative Liability, Gross 0 0
Natural Gas Commodity | Level 1 | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments | Balance Sheet Location [Axis]: us-gaap:OtherAssetsCurrent    
Derivative [Line Items]    
Derivative Asset, Gross 0 0
Natural Gas Commodity | Level 2 | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments    
Derivative [Line Items]    
Derivative Liability, Gross 0 10
Natural Gas Commodity | Level 2 | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments | Balance Sheet Location [Axis]: us-gaap:OtherAssetsCurrent    
Derivative [Line Items]    
Derivative Asset, Gross 1 14
Natural Gas Commodity | Level 3 | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments    
Derivative [Line Items]    
Derivative Liability, Gross 0 0
Natural Gas Commodity | Level 3 | Fair Value, Measured on a Recurring Basis | Other Derivative Instruments | Balance Sheet Location [Axis]: us-gaap:OtherAssetsCurrent    
Derivative [Line Items]    
Derivative Asset, 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 June 30, 2026 and Dec. 31, 2025, derivative assets and liabilities include no obligations to return cash collateral. At June 30, 2026 and Dec. 31, 2025, derivative assets and liabilities include rights to reclaim cash collateral of $10 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.