Description of Plan - Employer Contributions (Details) - EBP 003	12 Months Ended
Dec. 31, 2025
Non-represented management employees
Description of Plan
Employer contribution, matching percentage	100.00%
Employer contribution, matching percentage of eligible compensation	5.00%
PGL Local 18007
Description of Plan
Employer contribution, matching percentage	100.00%
Employer contribution, matching percentage of eligible compensation	5.00%
Local 2006
Description of Plan
Participant Contribution, Automatic, Deferral Rate	7.00%
Local 2150 Seasonal
Description of Plan
Participant Contribution, Automatic, Deferral Rate	7.00%
Local 2150 Temporary
Description of Plan
Participant Contribution, Automatic, Deferral Rate	3.00%
Gross Pay \| WPSC Local 420
Description of Plan
Participant Contribution, Automatic, Deferral Rate	2.00%
Base Pay \| WPSC Local 420
Description of Plan
Participant Contribution, Automatic, Deferral Rate	2.70%
Hired prior to December 19, 2009 \| WPSC Local 420
Description of Plan
Employer contribution, matching percentage	0.00%
Hired on or after December 19, 2009 \| WPSC Local 420
Description of Plan
Employer contribution, matching percentage	100.00%
Employer contribution, matching percentage of eligible compensation	5.00%

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.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478416/962-205-50-1

+ Details

Name:	us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems
Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of employer matching contribution on eligible participant contribution to employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 962
-SubTopic 325
-Name Accounting Standards Codification
-Section 55
-Paragraph 17
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478873/962-325-55-17

+ Details

Name:	us-gaap-ebp_EmployeeBenefitPlanEmployerContributionMatchingPercentage
Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of participant compensation eligible for employer matching contribution for participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

+ Details

Name:	us-gaap-ebp_EmployeeBenefitPlanEmployerContributionParticipantCompensationMatchedPercentage
Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of eligible compensation contributed for participant automatically enrolled in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

+ Details

Name:	us-gaap-ebp_EmployeeBenefitPlanParticipantContributionAutomaticDeferralRate
Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	dei_LegalEntityAxis=wec_EBP003Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	wec_EmployeeGroupAxis=wec_NonRepresentedManagementEmployeesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	wec_EmployeeGroupAxis=wec_PGLLocal18007Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	wec_EmployeeGroupAxis=wec_Local2006Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	wec_EmployeeGroupAxis=wec_Local2150Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	wec_EmployeeGroupAxis=wec_Local2150TemporaryMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	wec_CompensationAxis=wec_GrossPayMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	wec_EmployeeGroupAxis=wec_WPSCLocal420Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	wec_CompensationAxis=wec_BasePayMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	wec_EmployeeHiringDateAxis=wec_HiredPriorToDecember192009Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	wec_EmployeeHiringDateAxis=wec_HiredOnOrAfterDecember192009Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: