XML 93 R48.htm IDEA: XBRL DOCUMENT
v3.25.0.1

Regulatory Assets and Liabilities, Regulatory Liabilities (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Regulatory Liabilities [Line Items] |  |  |
Regulatory Liability, Current | [1] | $ 852 | $ 528
Regulatory Liability, Noncurrent | [1] | 6,010 | 5,827
Entity's Recorded Provision for Revenue Subject To Refund |  | 3 | 187
Regulatory assets not currently earning a return |  | 892 | 1,085
Regulatory assets not currently earning a return |  | 892 | 1,085
Deferred income tax adjustment and TCJA refunds |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory Liability, Current | [2] | 7 | 7
Regulatory Liability, Noncurrent | [2] | 2,888 | 3,015
Plant removal costs |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory Liability, Current |  | 0 | 0
Regulatory Liability, Noncurrent |  | 2,208 | 1,984
Effects of regulation on employee benefit costs |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory Liability, Current | [3] | 0 | 0
Regulatory Liability, Noncurrent | [3] | 259 | 253
Renewable resources and environmental initiatives |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory Liability, Current |  | 16 | 9
Regulatory Liability, Noncurrent |  | 232 | 188
Net AROs |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory Liability, Current | [4] | 0 | 0
Regulatory Liability, Noncurrent | [4] | 161 | 90
ITC deferrals |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory Liability, Current |  | 0 | 1
Regulatory Liability, Noncurrent |  | 70 | 60
Contract valuation adjustments |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory Liability, Current | [5] | 89 | 56
Regulatory Liability, Noncurrent | [5] | 0 | 0
Deferred electric, natural gas and steam production costs |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory Liability, Current |  | 480 | 220
Regulatory Liability, Noncurrent |  | 12 | 0
Conservation programs |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory Liability, Current | [6] | 52 | 47
Regulatory Liability, Noncurrent | [6] | $ 0 | 0
Conservation programs | Minimum |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory Liability, Amortization Period |  | 1 year |
Other |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory Liability, Current | [7] | $ 205 | 188
Regulatory Liability, Noncurrent | [7] | 143 | 237
Inflation Reduction Act deferral |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory Liability, Current |  | 3 | 0
Regulatory Liability, Noncurrent |  | $ 37 | $ 0
Inflation Reduction Act deferral | Maximum |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory Liability, Amortization Period |  | 3 years |
[1] | Revenue subject to refund of $3 million and $187 million for 2024 and 2023, respectively, is included in other current liabilities.
[2] | Includes the revaluation of recoverable/regulated plant ADIT and revaluation impact of non-plant ADIT due to the TCJA.
[3] | Includes regulatory amortization and certain 2018 TCJA benefits approved by the CPUC to offset the PSCo prepaid pension asset.
[4] | Includes amounts recorded for future recovery of AROs, less amounts recovered through nuclear decommissioning accruals and gains from decommissioning investments.
[5] | Includes the fair value of FTR instruments utilized/intended to offset the impacts of transmission system congestion.
[6] | Includes costs for conservation programs, as well as incentives allowed in certain jurisdictions.
[7] | .

X
- Definition 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. + References No definition available. + Details
Name: | us-gaap_RegulatoryLiabilitiesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amortization period for the recovery of regulatory liability, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_RegulatoryLiabilityAmortizationPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

X
- Definition The amount for the individual regulatory current liability as itemized in a table of regulatory current liabilities as of the end of the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 980 -SubTopic 405 -Name Accounting Standards Codification -Section 25 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477571/980-405-25-1 + Details
Name: | us-gaap_RegulatoryLiabilityCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount for the individual regulatory noncurrent liability as itemized in a table of regulatory noncurrent liabilities as of the end of the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(24)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_RegulatoryLiabilityNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Remaining balance of regulatory assets for which no return on investment during recovery is provided. In some cases, a regulator may permit an enterprise to include a cost that would be charged to expense by an unregulated enterprise as an allowable cost over a period of time by amortizing that cost for rate-making purposes, but the regulator does not include the unrecovered amount in the rate base. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 980 -SubTopic 340 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478742/980-340-50-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 980 -SubTopic 340 -Section 55 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478098/980-340-55-2 + Details
Name: | us-gaap_RemainingAmountsOfRegulatoryAssetsForWhichNoReturnOnInvestmentDuringRecoveryPeriodIsProvided
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The entity's recorded provision for revenue subject to refund. + References No definition available. + Details
Name: | xel_EntitysRecordedProvisionforRevenueSubjectToRefund
Namespace Prefix: | xel_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=us-gaap_DeferredIncomeTaxChargesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=xel_PlantRemovalCostsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=xel_EffectsofregulationonemployeebenefitcostsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=xel_RenewableResourcesAndEnvironmentalInitiativesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=us-gaap_AssetRetirementObligationCostsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=xel_InvestmentTaxCreditDeferralsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=xel_ContractValuationAdjustmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=xel_DeferredElectricGasAndSteamProductionCostsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=xel_ConservationProgramsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=xel_OtherRegulatoryLiabilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=xel_InflationReductionActDeferralMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |