Contractual interest rate for funds borrowed, under the debt agreement.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1B
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
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

No definition available.

+ Details

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

- Definition

The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3255-108585

+ Details

Name:	us-gaap_ProceedsFromIssuanceOfDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_DebtInstrumentAxis=wec_WE475DebenturesDueSeptember302032Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	us-gaap_DebtInstrumentAxis=wec_WPS535SeniorNotesDueNovember102025Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	us-gaap_DebtInstrumentAxis=wec_A523PGLSeriesMMMDueDecember12027Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	us-gaap_DebtInstrumentAxis=wec_A638WECIWindHoldingIILLCSeniorNotesDue2031Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	srt_ConsolidatedEntitiesAxis=srt_ParentCompanyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=wec_WEC500SeniorNotesDueSeptember272025Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=wec_WEC515SeniorNotesDueOctober12027Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=wec_WEC475650MSeniorNotesDueJanuary92026Member
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:	us-gaap_DebtInstrumentAxis=wec_WEC475450MSeniorNotesDueJanuary152028Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Long-Term Debt - Issuances and Redemptions (Details) - USD ($) $ in Millions	1 Months Ended
	Jan. 31, 2023	Dec. 31, 2022	Nov. 30, 2022	Sep. 30, 2022
WE 4.75% Debentures due September 30, 2032 \| WE
Long-term debt
Issuance of debt				$ 500.0
Interest rate				4.75%
WPS 5.35% Senior Notes due November 10, 2025 \| WPS
Long-term debt
Issuance of debt			$ 300.0
Interest rate			5.35%
5.23% PGL Series MMM due December 1, 2027 \| PGL
Long-term debt
Issuance of debt		$ 100.0
Interest rate		5.23%
6.38% WECI Wind Holding II LLC Senior Notes Due 2031 \| WECI Wind Holding II
Long-term debt
Issuance of debt		$ 199.3
Interest rate		6.38%
WEC Energy Group \| WEC 5.00% Senior Notes Due September 27, 2025
Long-term debt
Issuance of debt				$ 500.0
Interest rate				5.00%
WEC Energy Group \| WEC 5.15% Senior Notes Due October 1, 2027
Long-term debt
Issuance of debt				$ 400.0
Interest rate				5.15%
WEC Energy Group \| WEC 4.75% Senior Notes due January 9, 2026 \| Subsequent event
Long-term debt
Issuance of debt	$ 650.0
Interest rate	4.75%
WEC Energy Group \| WEC 4.75% $450M Senior Notes due January 15, 2028 \| Subsequent event
Long-term debt
Issuance of debt	$ 450.0
Interest rate	4.75%