Leases - Land Leases -Non-Utility Energy Infrastructure Solar Generation (Details) - renewal_terms	12 Months Ended
Dec. 31, 2024	Feb. 11, 2025
Hardin Solar III Energy Center \| Subsequent event \| WECI
Leases
Ownership interest in generating facility acquired		90.00%
Land lease - non-utility energy infrastructure solar generation
Leases
Minimum number of contract renewals	1
Contract term	50 years

Term of lessee's finance lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-3

+ Details

Name:	us-gaap_LesseeFinanceLeaseTermOfContract1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

- 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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 7A
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-7A

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-3

+ Details

Name:	us-gaap_LesseeLeaseDescriptionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Minimum number of contract renewals

+ References

No definition available.

+ Details

Name:	wec_MinimumNumberOfContractRenewals
Namespace Prefix:	wec_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the ownership interest of the generating facility acquired

+ References

No definition available.

+ Details

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Namespace Prefix:	wec_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_AssetAcquisitionAxis=wec_HardinSolarIIIEnergyCenterMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=wec_WECInfrastructureLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=wec_LandLeaseNonUtilityEnergyInfrastructureSolarGenerationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: