XML 69 R57.htm IDEA: XBRL DOCUMENT
v3.19.2

ACQUISITIONS - BISHOP HILL III (Details) - Bishop Hill III Wind Energy Center $ in Millions | 1 Months Ended |  |
--- | --- | --- | ---
Aug. 31, 2018 USD ($) MW | Jun. 30, 2019 | Dec. 31, 2018 USD ($)
Business Acquisition [Line Items] |  |  |
WEC's ownership interest in Bishop Hill III Wind Energy Center |  | 80.00% |
Capacity of Bishop Hill III Wind Energy Center | MW | 132 |  |
Acquisition purchase price | $ 144.7 |  | $ 18.2
Restricted cash acquired | $ 4.5 |  |
Additional Ownership Interest in Bishop Hill III Wind Energy Center |  |  | 10.00%
Duration of offtake agreement for the sale of energy produced | 22 years |  |
Bonus depreciation percentage |  | 100.00% |

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

X
- Definition Amount of asset recognized arising from contingent consideration in a business combination, expected to be realized beyond one year or the normal operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 25 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6411-128476 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 35 -Paragraph 1 -Subparagraph b -URI http://asc.fasb.org/extlink&oid=116859824&loc=d3e6819-128478 + Details
Name: | us-gaap_BusinessCombinationContingentConsiderationAssetNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Acquisition purchase price + References No definition available. + Details
Name: | wec_Acquisitionpurchaseprice
Namespace Prefix: | wec_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Additional Ownership Interest in Bishop Hill III Wind Energy Center + References No definition available. + Details
Name: | wec_AdditionalOwnershipInterestinBishopHillIIIWindEnergyCenter
Namespace Prefix: | wec_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Bonus depreciation percentage + References No definition available. + Details
Name: | wec_Bonusdepreciationpercentage
Namespace Prefix: | wec_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Capacity of Bishop Hill III Wind Energy Center + References No definition available. + Details
Name: | wec_CapacityofBishopHillIIIWindEnergyCenter
Namespace Prefix: | wec_
Data Type: | num:powerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Duration of offtake agreement for the sale of energy produced + References No definition available. + Details
Name: | wec_Durationofofftakeagreementforthesaleofenergyproduced
Namespace Prefix: | wec_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition WEC's ownership interest in Bishop Hill III Wind Energy Center + References No definition available. + Details
Name: | wec_WECsownershipinterestinBishopHillIIIWindEnergyCenter
Namespace Prefix: | wec_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=wec_BishopHillIIIWindEnergyCenterMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |