XML 178 R164.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Regulatory Environment - WI 2022 Rates (Details) - 2022 Rates - Public Service Commission of Wisconsin (PSCW) - utility | 1 Months Ended |
--- | --- | ---
Sep. 30, 2021 | Mar. 23, 2021
Public Utilities, General Disclosures |  |
Period to forego filing a rate case | 1 year |
Number of utilities entering into agreement |  | 3
Percentage of first 15 basis points of additional earnings retained by the utility | 100.00% |
Return on equity in excess of authorized amount (as a percent) | 0.15% |

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_PublicUtilitiesGeneralDisclosuresLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of Companies Entering into Agreement + References No definition available. + Details
Name: | wec_NumberOfCompaniesEnteringIntoAgreement
Namespace Prefix: | wec_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Percentage of first 15 basis points of additional earnings retained by the utility + References No definition available. + Details
Name: | wec_PercentageOfFirst15BasisPointsOfAdditionalEarningsRetainedByTheUtility
Namespace Prefix: | wec_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Period to forego filing a rate case + References No definition available. + Details
Name: | wec_PeriodToForegoFilingARateCase
Namespace Prefix: | wec_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Return on equity (ROE) in excess of authorized amount, for which the additional earnings will be retained by the utility. + References No definition available. + Details
Name: | wec_Returnonequityinexcessofauthorizedamountasapercent
Namespace Prefix: | wec_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | wec_RateCaseYearAxis=wec_A2022RatesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAgencyAxis=wec_PublicServiceCommissionOfWisconsinPSCWMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |