XML 58 R2.htm IDEA: XBRL DOCUMENT
v3.25.1

Pay vs Performance Disclosure | 12 Months Ended | 25 Months Ended | 35 Months Ended
--- | --- | --- | ---
Dec. 31, 2024 USD ($) $ / shares | Dec. 31, 2023 USD ($) $ / shares | Dec. 31, 2022 USD ($) $ / shares | Dec. 31, 2021 USD ($) $ / shares | Dec. 31, 2020 USD ($) $ / shares | Jan. 31, 2022 | Dec. 31, 2024
Pay vs Performance Disclosure |  |  |  |  |  |  |  |
Company Selected Measure Name |  | Adjusted Earnings Per Share (diluted) |  |  |  |  |  |
Named Executive Officers, Footnote |  | On February 1, 2022, Mr. Lauber succeeded Mr. Fletcher as CEO.The non-PEO NEOs for each of the years shown were as follows: •2024: Messrs. Klappa, Hooper, and Garvin, and Mmes. Liu and Kelsey •2022 and 2023: Messrs. Klappa and Garvin, and Mmes. Liu and Kelsey •2021: Messrs. Klappa and Lauber, and Mmes. Liu and Kelsey •2020: Messrs. Lauber, Klappa, Garvin, and Kuester, and Mmes. Liu, and Kelsey |  |  |  |  |  |
Peer Group Issuers, Footnote |  | Represents the Total Shareholder Return ("TSR") of the Custom Peer Index Group, weighted according to the respective companies' stock market capitalization at the beginning of each period for which a return is indicated. For information about the Custom Peer Index Group see "Performance Graph" in the Company's 2024 Annual Report. |  |  |  |  |  |
Adjustment To PEO Compensation, Footnote |  | Represents the CAP to each of Messrs. Lauber and Fletcher, and the average CAP to the non-PEO NEOs as a group, each as computed in accordance with Item 402(v) of Regulation S-K. The dollar amounts do not reflect the actual amount of compensation earned or paid during the applicable fiscal years. To calculate the CAP to Messrs. Lauber, and the average CAP to our non-PEO NEOs for the 2024 fiscal year, the following adjustments were made to the SCT total compensation: SCT to CAP Reconciliation
Year | SCT Total ($) | Deductions from SCT Total | Additions to SCT Total | CAP ($)
Change in Pension Value ($) | (a) Equity-based awards Grant Date Fair Value ($) | (b) Pension Benefit Service Costs ($) | (c)(i) Change in Value of Covered Fiscal Year Awards Unvested at Covered Fiscal Year-End ($) | (c)(ii) Change in Value of Prior Years' Awards Unvested at Fiscal Year-End ($) | (c)(iii) Value of Awards Granted and Vested in Covered Fiscal Year ($) | (c)(iv) Change in Value of Prior Years' Awards that Vested in Fiscal Year ($)
Lauber SCT to CAP Reconciliation
2024 | 10,948,091 | 332,397 | 5,518,335 | 64,795 | 7,783,433 | 1,414,649 | — | 1,860,478 | 16,220,714
Average Non-PEO NEOs SCT to CAP Reconciliation
2024 | 4,739,937 | 236,773 | 2,454,803 | 14,901 | 1,507,026 | 245,528 | 690,570 | 310,266 | 4,816,652
(a) Represents the grant date fair value of equity awards as reflected in the "Stock Awards" and "Option Awards" columns of the SCT. (b) Represents the actuarially determined value of the pension benefit accrual for services rendered by each NEO during the applicable year. There were no costs of benefits granted pursuant to a plan amendment during any covered fiscal year that were attributed by the plan's benefit formula to services rendered in periods prior to the plan amendment. (c) Represents (i) the covered fiscal year-end value of any equity awards granted in the covered fiscal year that were outstanding and unvested as of the end of such year; (ii) the amount of the change as of the covered fiscal year-end (from the end of the prior fiscal year) in fair value of any awards granted in prior years that were outstanding and unvested as of the end of the covered fiscal year; (iii) the fair value as of the vesting date of awards granted in a covered fiscal year that vested in the same covered fiscal year; and (iv) the amount equal to the change as of the vesting date (from the end of the prior fiscal year) in fair value for awards granted in prior years that vested during the covered fiscal year. The valuation assumptions used to calculate fair values did not materially differ from those disclosed at the time of grant. |  |  |  |  |  |
Non-PEO NEO Average Total Compensation Amount | [1] | $ 4,739,937 | $ 5,188,505 | $ 4,358,213 | $ 4,911,241 | $ 4,686,918 |  |
Non-PEO NEO Average Compensation Actually Paid Amount | [1],[2] | $ 4,816,652 | 2,920,498 | 5,256,205 | 4,273,523 | 4,030,865 |  |
Adjustment to Non-PEO NEO Compensation Footnote |  | Represents the CAP to each of Messrs. Lauber and Fletcher, and the average CAP to the non-PEO NEOs as a group, each as computed in accordance with Item 402(v) of Regulation S-K. The dollar amounts do not reflect the actual amount of compensation earned or paid during the applicable fiscal years. To calculate the CAP to Messrs. Lauber, and the average CAP to our non-PEO NEOs for the 2024 fiscal year, the following adjustments were made to the SCT total compensation: SCT to CAP Reconciliation
Year | SCT Total ($) | Deductions from SCT Total | Additions to SCT Total | CAP ($)
Change in Pension Value ($) | (a) Equity-based awards Grant Date Fair Value ($) | (b) Pension Benefit Service Costs ($) | (c)(i) Change in Value of Covered Fiscal Year Awards Unvested at Covered Fiscal Year-End ($) | (c)(ii) Change in Value of Prior Years' Awards Unvested at Fiscal Year-End ($) | (c)(iii) Value of Awards Granted and Vested in Covered Fiscal Year ($) | (c)(iv) Change in Value of Prior Years' Awards that Vested in Fiscal Year ($)
Lauber SCT to CAP Reconciliation
2024 | 10,948,091 | 332,397 | 5,518,335 | 64,795 | 7,783,433 | 1,414,649 | — | 1,860,478 | 16,220,714
Average Non-PEO NEOs SCT to CAP Reconciliation
2024 | 4,739,937 | 236,773 | 2,454,803 | 14,901 | 1,507,026 | 245,528 | 690,570 | 310,266 | 4,816,652
(a) Represents the grant date fair value of equity awards as reflected in the "Stock Awards" and "Option Awards" columns of the SCT. (b) Represents the actuarially determined value of the pension benefit accrual for services rendered by each NEO during the applicable year. There were no costs of benefits granted pursuant to a plan amendment during any covered fiscal year that were attributed by the plan's benefit formula to services rendered in periods prior to the plan amendment. (c) Represents (i) the covered fiscal year-end value of any equity awards granted in the covered fiscal year that were outstanding and unvested as of the end of such year; (ii) the amount of the change as of the covered fiscal year-end (from the end of the prior fiscal year) in fair value of any awards granted in prior years that were outstanding and unvested as of the end of the covered fiscal year; (iii) the fair value as of the vesting date of awards granted in a covered fiscal year that vested in the same covered fiscal year; and (iv) the amount equal to the change as of the vesting date (from the end of the prior fiscal year) in fair value for awards granted in prior years that vested during the covered fiscal year. The valuation assumptions used to calculate fair values did not materially differ from those disclosed at the time of grant. |  |  |  |  |  |
Compensation Actually Paid vs. Total Shareholder Return |  | CAP v. TSR As demonstrated in the following graph, the amount of compensation paid to the PEOs and the average compensation paid to the other NEOs was aligned with the Company’s TSR performance. A substantial portion of the compensation awarded to each of the NEOs is long-term incentive compensation. For most of the NEOs, performance unit awards comprise 65% of the long-term incentive compensation granted each year, with vesting primarily based upon the Company’s TSR performance against its peer group. As discussed further in “Compensation Discussion and Analysis,” the performance units granted in 2022, which vested at the end of the three-year performance period ended December 31, 2024, provided a payout slightly above target. See the Five-Year Cumulative Return and Total Stockholder Returns graphs in “Compensation Discussion and Analysis – Executive Summary” for information on the Company’s performance over the 5-year period ended December 31, 2024, which was in line with the performance of its peer group, and 10-year period ended December 31, 2024, which exceeded the performance of its peer group, respectively. |  |  |  |  |  |
Compensation Actually Paid vs. Net Income |  | CAP v. WEC Net Income and Adjusted Earnings Per Share (Company-Selected Measure) As demonstrated by the following graphs, during the cumulative five-year period ended December 31, 2024, the compensation paid to the PEOs and the average compensation paid to the other NEOs was aligned with the Company’s net income and EPS performance. In 2024 and 2023, WEC Energy Group's EPS performance is shown on an adjusted (non-GAAP) basis. Pursuant to the terms of the Company’s short-term performance plan, in 2024, almost 75% of the payout was based upon the Company’s adjusted EPS performance, and almost 25% was based upon the Company’s performance against cash flow goals. See "Compensation Discussion and Analysis" for information on how the EPS and cash flow targets were established for 2024, as well as the performance metrics applicable to Mr. Hooper's 2024 annual cash incentive award. The Company’s strong performance against the EPS and cash flow goals in 2024 resulted in maximum level payouts for each measure. WEC Energy Group’s earnings per share on a GAAP basis were $4.83 for 2024, which includes a $0.06 per share charge to earnings related to certain capital expenditures under the Qualifying Infrastructure Plant (“QIP”) rider that were disallowed by the Illinois Commerce Commission (the “ICC”) as part of PGL's 2016 QIP reconciliation proceeding. Excluding this charge, WEC Energy Group’s adjusted earnings per share were $4.88. PGL has since appealed this decision. The ICC’s disallowance of these expenditures is not indicative of WEC Energy Group’s operating performance in 2024. As a result, the Compensation Committee determined that the Company’s performance against the earnings per share targets should be measured using adjusted earnings per share. With respect to the earnings per share calculation, note that WEC Energy Group’s adjusted earnings per share does not add due to rounding. WEC Energy Group’s earnings per share on a GAAP basis were $4.22 for 2023, which includes a $0.41 per share non-cash charge to earnings related to the ICC's disallowance of an aggregate of $178.9 million of previously incurred capital costs as part of its decisions in the rate cases of the Company’s Illinois utilities. Excluding this charge, WEC Energy Group’s 2023 adjusted earnings per share were $4.63. The ICC’s disallowance of previously incurred capital costs of this nature is not indicative of WEC Energy Group’s operating performance in 2023. As a result, the Compensation Committee determined that the Company’s performance against the earnings per share targets should be measured using adjusted earnings per share. See Appendix A for net income presented on an adjusted basis (non-GAAP) along with a reconciliation to net income, presented on a GAAP basis, for 2024 and 2023. In the graph below, net income is presented on a GAAP basis. EPS is presented on an adjusted (non-GAAP) basis for 2024 and 2023 and on a GAAP basis for years prior to 2023. |  |  |  |  |  |
Compensation Actually Paid vs. Company Selected Measure |  | CAP v. WEC Net Income and Adjusted Earnings Per Share (Company-Selected Measure) As demonstrated by the following graphs, during the cumulative five-year period ended December 31, 2024, the compensation paid to the PEOs and the average compensation paid to the other NEOs was aligned with the Company’s net income and EPS performance. In 2024 and 2023, WEC Energy Group's EPS performance is shown on an adjusted (non-GAAP) basis. Pursuant to the terms of the Company’s short-term performance plan, in 2024, almost 75% of the payout was based upon the Company’s adjusted EPS performance, and almost 25% was based upon the Company’s performance against cash flow goals. See "Compensation Discussion and Analysis" for information on how the EPS and cash flow targets were established for 2024, as well as the performance metrics applicable to Mr. Hooper's 2024 annual cash incentive award. The Company’s strong performance against the EPS and cash flow goals in 2024 resulted in maximum level payouts for each measure. WEC Energy Group’s earnings per share on a GAAP basis were $4.83 for 2024, which includes a $0.06 per share charge to earnings related to certain capital expenditures under the Qualifying Infrastructure Plant (“QIP”) rider that were disallowed by the Illinois Commerce Commission (the “ICC”) as part of PGL's 2016 QIP reconciliation proceeding. Excluding this charge, WEC Energy Group’s adjusted earnings per share were $4.88. PGL has since appealed this decision. The ICC’s disallowance of these expenditures is not indicative of WEC Energy Group’s operating performance in 2024. As a result, the Compensation Committee determined that the Company’s performance against the earnings per share targets should be measured using adjusted earnings per share. With respect to the earnings per share calculation, note that WEC Energy Group’s adjusted earnings per share does not add due to rounding. WEC Energy Group’s earnings per share on a GAAP basis were $4.22 for 2023, which includes a $0.41 per share non-cash charge to earnings related to the ICC's disallowance of an aggregate of $178.9 million of previously incurred capital costs as part of its decisions in the rate cases of the Company’s Illinois utilities. Excluding this charge, WEC Energy Group’s 2023 adjusted earnings per share were $4.63. The ICC’s disallowance of previously incurred capital costs of this nature is not indicative of WEC Energy Group’s operating performance in 2023. As a result, the Compensation Committee determined that the Company’s performance against the earnings per share targets should be measured using adjusted earnings per share. See Appendix A for net income presented on an adjusted basis (non-GAAP) along with a reconciliation to net income, presented on a GAAP basis, for 2024 and 2023. In the graph below, net income is presented on a GAAP basis. EPS is presented on an adjusted (non-GAAP) basis for 2024 and 2023 and on a GAAP basis for years prior to 2023 * Earnings per share for 2020, 2021 and 2022 are presented on a GAAP basis. |  |  |  |  |  |
Tabular List, Table |  | Most Important Performance Measures The following represents the most important financial performance measures used by WEC Energy Group to link compensation actually paid to each NEO for 2024, the most recently completed fiscal year, to company performance:
Adjusted Earnings Per Share |  | Net Income |  | Cash Flow |  | Return on Equity
Achievement of the Company’s goals with respect to the financial measures highlighted above should drive strong TSR performance for the Company relative to its peers, which is an important component of our compensation program as more fully described in “Compensation Discussion and Analysis – Long-Term Incentive Compensation". |  |  |  |  |  |
Total Shareholder Return Amount | [3] | $ 119.66 | 103.04 | 110.80 | 111.34 | 102.49 |  |
Peer Group Total Shareholder Return Amount | [4] | 122.96 | 105.56 | 113.90 | 111.43 | 95.16 |  |
Net Income (Loss) |  | $ 1,527,200,000 | $ 1,331,700,000 | $ 1,408,100,000 | $ 1,300,300,000 | $ 1,199,900,000 |  |
Company Selected Measure Amount | $ / shares | [5] | 4.88 | 4.63 | 4.45 | 4.11 | 3.79 |  |
PEO Name |  |  |  |  |  |  | Mr. Fletcher | Mr. Lauber
Additional 402(v) Disclosure |  | Assumes an investment of $100 at the beginning of the measurement period and reinvestment of all dividends. The “measurement period” for each covered fiscal year is the period from December 31, 2019 through the end of such covered fiscal year. |  |  |  |  |  |
Non-GAAP Earnings Per Share Adjustment |  | $ 0.06 | $ 0.41 |  |  |  |  |
Measure:: 1 |  |  |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |  |  |
Name |  | Adjusted Earnings Per Share |  |  |  |  |  |
Non-GAAP Measure Description |  | For 2024 and 2023, the Company Selected Measure was adjusted (non-GAAP) earnings per share which excludes a $0.06 per share charge and a $0.41 per share non-cash charge, respectively to earnings related to the Illinois Commerce Commission's disallowance of certain capital costs. See Appendix A on page P-90 for a full reconciliation of GAAP to non-GAAP earnings per share. The prior years reported in this table each show the Company's earnings per share on a GAAP basis. |  |  |  |  |  |
Measure:: 2 |  |  |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |  |  |
Name |  | Net Income |  |  |  |  |  |
Measure:: 3 |  |  |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |  |  |
Name |  | Cash Flow |  |  |  |  |  |
Measure:: 4 |  |  |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |  |  |
Name |  | Return on Equity |  |  |  |  |  |
Lauber [Member] |  |  |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |  |  |
PEO Total Compensation Amount | [6] | $ 10,948,091 | 9,552,179 | $ 8,149,461 | $ 0 | $ 0 |  |
PEO Actually Paid Compensation Amount | [2],[6] | 16,220,714 | 5,707,745 | 9,721,228 | 0 | 0 |  |
Fletcher [Member] |  |  |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |  |  |
PEO Total Compensation Amount | [6] | 0 | 0 | 8,151,511 | 18,481,871 | 18,136,171 |  |
PEO Actually Paid Compensation Amount | [2],[6] | 0 | $ 0 | $ 17,332,947 | $ 14,249,651 | $ 15,590,856 |  |
PEO | Lauber [Member] | Change In Pension Value [Member] |  |  |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |  |  |
Adjustment to Compensation, Amount |  | (332,397) |  |  |  |  |  |
PEO | Lauber [Member] | Equity Bade Awards Grant Date Fair Value [Member] |  |  |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |  |  |
Adjustment to Compensation, Amount |  | (5,518,335) |  |  |  |  |  |
PEO | Lauber [Member] | Pension Benefit Service Costs [Member] |  |  |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |  |  |
Adjustment to Compensation, Amount |  | 64,795 |  |  |  |  |  |
PEO | Lauber [Member] | Change In Value Of Covered Fiscal Year Unvested [Member] |  |  |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |  |  |
Adjustment to Compensation, Amount |  | 7,783,433 |  |  |  |  |  |
PEO | Lauber [Member] | Change In Value Of Prior Years Unvested [Member] |  |  |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |  |  |
Adjustment to Compensation, Amount |  | 1,414,649 |  |  |  |  |  |
PEO | Lauber [Member] | Value Of Awards Granted And Vested In Covered Fiscal Year [Member] |  |  |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |  |  |
Adjustment to Compensation, Amount |  | 0 |  |  |  |  |  |
PEO | Lauber [Member] | Change In Value Of Prior Years Vested [Member] |  |  |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |  |  |
Adjustment to Compensation, Amount |  | 1,860,478 |  |  |  |  |  |
Non-PEO NEO | Change In Pension Value [Member] |  |  |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |  |  |
Adjustment to Compensation, Amount |  | (236,773) |  |  |  |  |  |
Non-PEO NEO | Equity Bade Awards Grant Date Fair Value [Member] |  |  |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |  |  |
Adjustment to Compensation, Amount |  | (2,454,803) |  |  |  |  |  |
Non-PEO NEO | Pension Benefit Service Costs [Member] |  |  |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |  |  |
Adjustment to Compensation, Amount |  | 14,901 |  |  |  |  |  |
Non-PEO NEO | Change In Value Of Covered Fiscal Year Unvested [Member] |  |  |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |  |  |
Adjustment to Compensation, Amount |  | 1,507,026 |  |  |  |  |  |
Non-PEO NEO | Change In Value Of Prior Years Unvested [Member] |  |  |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |  |  |
Adjustment to Compensation, Amount |  | 245,528 |  |  |  |  |  |
Non-PEO NEO | Value Of Awards Granted And Vested In Covered Fiscal Year [Member] |  |  |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |  |  |
Adjustment to Compensation, Amount |  | 690,570 |  |  |  |  |  |
Non-PEO NEO | Change In Value Of Prior Years Vested [Member] |  |  |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |  |  |
Adjustment to Compensation, Amount |  | $ 310,266 |  |  |  |  |  |
[1] | The non-PEO NEOs for each of the years shown were as follows: •2024: Messrs. Klappa, Hooper, and Garvin, and Mmes. Liu and Kelsey •2022 and 2023: Messrs. Klappa and Garvin, and Mmes. Liu and Kelsey •2021: Messrs. Klappa and Lauber, and Mmes. Liu and Kelsey •2020: Messrs. Lauber, Klappa, Garvin, and Kuester, and Mmes. Liu, and Kelsey
[2] | Represents the CAP to each of Messrs. Lauber and Fletcher, and the average CAP to the non-PEO NEOs as a group, each as computed in accordance with Item 402(v) of Regulation S-K. The dollar amounts do not reflect the actual amount of compensation earned or paid during the applicable fiscal years. To calculate the CAP to Messrs. Lauber, and the average CAP to our non-PEO NEOs for the 2024 fiscal year, the following adjustments were made to the SCT total compensation: SCT to CAP Reconciliation
Year | SCT Total ($) | Deductions from SCT Total | Additions to SCT Total | CAP ($)
Change in Pension Value ($) | (a) Equity-based awards Grant Date Fair Value ($) | (b) Pension Benefit Service Costs ($) | (c)(i) Change in Value of Covered Fiscal Year Awards Unvested at Covered Fiscal Year-End ($) | (c)(ii) Change in Value of Prior Years' Awards Unvested at Fiscal Year-End ($) | (c)(iii) Value of Awards Granted and Vested in Covered Fiscal Year ($) | (c)(iv) Change in Value of Prior Years' Awards that Vested in Fiscal Year ($)
Lauber SCT to CAP Reconciliation
2024 | 10,948,091 | 332,397 | 5,518,335 | 64,795 | 7,783,433 | 1,414,649 | — | 1,860,478 | 16,220,714
Average Non-PEO NEOs SCT to CAP Reconciliation
2024 | 4,739,937 | 236,773 | 2,454,803 | 14,901 | 1,507,026 | 245,528 | 690,570 | 310,266 | 4,816,652
(a) Represents the grant date fair value of equity awards as reflected in the "Stock Awards" and "Option Awards" columns of the SCT. (b) Represents the actuarially determined value of the pension benefit accrual for services rendered by each NEO during the applicable year. There were no costs of benefits granted pursuant to a plan amendment during any covered fiscal year that were attributed by the plan's benefit formula to services rendered in periods prior to the plan amendment. (c) Represents (i) the covered fiscal year-end value of any equity awards granted in the covered fiscal year that were outstanding and unvested as of the end of such year; (ii) the amount of the change as of the covered fiscal year-end (from the end of the prior fiscal year) in fair value of any awards granted in prior years that were outstanding and unvested as of the end of the covered fiscal year; (iii) the fair value as of the vesting date of awards granted in a covered fiscal year that vested in the same covered fiscal year; and (iv) the amount equal to the change as of the vesting date (from the end of the prior fiscal year) in fair value for awards granted in prior years that vested during the covered fiscal year. The valuation assumptions used to calculate fair values did not materially differ from those disclosed at the time of grant.
[3] | Assumes an investment of $100 at the beginning of the measurement period and reinvestment of all dividends. The “measurement period” for each covered fiscal year is the period from December 31, 2019 through the end of such covered fiscal year.
[4] | Represents the Total Shareholder Return ("TSR") of the Custom Peer Index Group, weighted according to the respective companies' stock market capitalization at the beginning of each period for which a return is indicated. For information about the Custom Peer Index Group see "Performance Graph" in the Company's 2024 Annual Report.
[5] | For 2024 and 2023, the Company Selected Measure was adjusted (non-GAAP) earnings per share which excludes a $0.06 per share charge and a $0.41 per share non-cash charge, respectively to earnings related to the Illinois Commerce Commission's disallowance of certain capital costs. See Appendix A on page P-90 for a full reconciliation of GAAP to non-GAAP earnings per share. The prior years reported in this table each show the Company's earnings per share on a GAAP basis
[6] | On February 1, 2022, Mr. Lauber succeeded Mr. Fletcher as CEO.

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v + Details
Name: | ecd_Additional402vDisclosureTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 3 + Details
Name: | ecd_AdjToCompAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 3 + Details
Name: | ecd_AdjToNonPeoNeoCompFnTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 3 + Details
Name: | ecd_AdjToPeoCompFnTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph vi + Details
Name: | ecd_CoSelectedMeasureAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph vi + Details
Name: | ecd_CoSelectedMeasureName
Namespace Prefix: | ecd_
Data Type: | xbrli:normalizedStringItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 5 -Subparagraph iii + Details
Name: | ecd_CompActuallyPaidVsCoSelectedMeasureTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 5 -Subparagraph ii + Details
Name: | ecd_CompActuallyPaidVsNetIncomeTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 5 -Subparagraph i + Details
Name: | ecd_CompActuallyPaidVsTotalShareholderRtnTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph vi + Details
Name: | ecd_MeasureName
Namespace Prefix: | ecd_
Data Type: | xbrli:normalizedStringItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 3 + Details
Name: | ecd_NamedExecutiveOfficersFnTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph vi + Details
Name: | ecd_NonGaapMeasureDescriptionTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph iii + Details
Name: | ecd_NonPeoNeoAvgCompActuallyPaidAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph ii + Details
Name: | ecd_NonPeoNeoAvgTotalCompAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph iv + Details
Name: | ecd_PeerGroupIssuersFnTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph iv + Details
Name: | ecd_PeerGroupTotalShareholderRtnAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph iii + Details
Name: | ecd_PeoActuallyPaidCompAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 3 + Details
Name: | ecd_PeoName
Namespace Prefix: | ecd_
Data Type: | xbrli:normalizedStringItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph ii + Details
Name: | ecd_PeoTotalCompAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 1 + Details
Name: | ecd_PvpTable
Namespace Prefix: | ecd_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 6 + Details
Name: | ecd_TabularListTableTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph iv + Details
Name: | ecd_TotalShareholderRtnAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 250 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483443/250-10-50-6 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 250 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483443/250-10-50-9 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 60 -Name Accounting Standards Codification -Section 65 -Paragraph 1 -Subparagraph (g) -Publisher FASB -URI https://asc.fasb.org/1943274/2147476176/805-60-65-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 323 -Name Accounting Standards Codification -Section 65 -Paragraph 2 -Subparagraph (g)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478666/740-323-65-2 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(20)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(g)(1)(ii)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 323 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481687/323-10-50-3 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 28 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-28 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482765/220-10-50-6 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 250 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483443/250-10-50-3 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Topic 250 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483443/250-10-50-1 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 40 -Name Accounting Standards Codification -Section 65 -Paragraph 1 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480175/815-40-65-1 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Topic 250 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483443/250-10-50-8 Reference 14: http://www.xbrl.org/2003/role/disclosureRef -Topic 250 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483443/250-10-50-11 Reference 15: http://www.xbrl.org/2003/role/disclosureRef -Topic 250 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483443/250-10-50-11 Reference 16: http://www.xbrl.org/2003/role/disclosureRef -Topic 250 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483443/250-10-50-4 Reference 17: http://www.xbrl.org/2003/role/exampleRef -Topic 946 -SubTopic 830 -Name Accounting Standards Codification -Section 55 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479168/946-830-55-10 Reference 18: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section 45 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479105/946-220-45-7 Reference 19: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(18)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477250/944-220-S99-1 Reference 20: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07(9)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1 Reference 21: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.6-09(1)(d)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479134/946-220-S99-3 Reference 22: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(i)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1A Reference 23: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(ii)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1A Reference 24: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(iii)(A)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1A Reference 25: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(iv)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1A Reference 26: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(5)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1A Reference 27: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(i)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1B Reference 28: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(iii)(A)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1B Reference 29: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(iii)(B)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1B Reference 30: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(iv)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1B Reference 31: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(5)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1B Reference 32: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 60B -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482689/260-10-45-60B Reference 33: http://www.xbrl.org/2003/role/disclosureRef -Topic 205 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483499/205-20-50-7 Reference 34: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 Reference 35: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1A -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-1A Reference 36: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1B -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-1B Reference 37: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(22)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478524/942-220-S99-1 + Details
Name: | us-gaap_NetIncomeLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | wec_NonGAAPEarningsPerShareAdjustment
Namespace Prefix: | wec_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | ecd_MeasureAxis=1
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_MeasureAxis=2
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_MeasureAxis=3
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_MeasureAxis=4
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_IndividualAxis=wec_LauberMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_IndividualAxis=wec_FletcherMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_ExecutiveCategoryAxis=ecd_PeoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=wec_ChangeInPensionValueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=wec_EquityBadeAwardsGrantDateFairValueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=wec_PensionBenefitServiceCostsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=wec_ChangeInValueOfCoveredFiscalYearUnvestedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=wec_ChangeInValueOfPriorYearsUnvestedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=wec_ValueOfAwardsGrantedAndVestedInCoveredFiscalYearMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=wec_ChangeInValueOfPriorYearsVestedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_ExecutiveCategoryAxis=ecd_NonPeoNeoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |