| Cover | 12 Months Ended |
| Dec. 31, 2022 | |
| Document Information [Line Items] | |
| Document Type | DEF 14C |
| Amendment Flag | false |
| Entity Information [Line Items] | |
| Entity Registrant Name | Wisconsin Electric Power Company |
| Entity Central Index Key | 0000107815 |
| Pay vs Performance Disclosure | 11 Months Ended | 12 Months Ended | 25 Months Ended | |||
| Dec. 31, 2022 | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Jan. 31, 2022 | ||
| Pay vs Performance Disclosure [Table] | ||||||
| Pay vs Performance [Table Text Block] | PAY VERSUS PERFORMANCE DISCLOSURE As described in more detail in “Compensation Discussion and Analysis,” the executive compensation program has been designed to provide a level of compensation that is strongly dependent upon the achievement of short-term and long-term goals that are aligned with the interests of WEC Energy Group’s and the Company’s stockholders and customers. As such, a substantial portion of pay will only be realized upon strong corporate performance. The Compensation Committee has not designed the compensation program to specifically align WEC Energy Group’s and the Company’s performance measures with “compensation actually paid” (“CAP”) (as computed in accordance with Item 402(v) of Regulation S-K) for a particular year. For example, several performance measures are utilized to align executive compensation with WEC Energy Group’s and the Company’s performance that are not presented in the Pay versus Performance table below. The following tables and supplemental graphical and narrative information present information about CAP, as defined by Item 402(v) of Regulation S-K, and compares CAP to various performance measures, also in accordance with such rules. CAP is a supplemental measure to be viewed alongside performance measures as an addition to the philosophy and strategy of compensation-setting discussed in “Compensation Discussion and Analysis,” and not in replacement thereof. Year (1) (1,2) (3) (2,3) Value of Initial Fixed $100 WEC Net Company Lauber Fletcher Lauber Fletcher (4) (5) WEC Earnings 2022 8,149,461 8,151,511 9,721,228 17,332,947 2,729,967 3,457,990 110.80 111.03 1,408.1 4.45 2021 — 18,481,871 — 14,249,651 3,428,937 2,769,595 111.34 110.07 1,300.3 4.11 2020 — 18,136,171 — 15,590,856 2,871,392 3,298,800 102.49 95.94 1,199.9 3.79 (1) On February 1, 2022, Mr. Lauber succeeded Mr. Fletcher as CEO of WEC Energy Group and the Company. (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 Fletcher, and the average CAP to our non-PEO NEOs, the following adjustments were made to the SCT total compensation for the applicable fiscal year: SCT to CAP Reconciliation Year SCT Total Deductions from SCT Total Additions to SCT Total CAP Change in (a) (b) (c)(i) (c)(ii) (c)(iii) (c)(iv) Lauber SCT to CAP Reconciliation 2022 8,149,461 101,995 3,677,045 47,302 4,020,237 242,593 — 1,040,675 9,721,228 2021 — — — — — — — — — 2020 — — — — — — — — — Fletcher SCT to CAP Reconciliation 2022 8,151,511 1,979,992 4,288,062 12,250,001 — — 1,481,678 1,717,811 17,332,947 2021 18,481,871 11,056,456 3,241,666 8,455,950 3,723,169 (1,556,840) — (556,377) 14,249,651 2020 18,136,171 11,037,728 3,109,135 7,556,108 3,386,570 633,130 — 25,740 15,590,856 Average Non-PEO NEOs SCT to CAP Reconciliation 2022 2,729,967 26,676 1,086,369 26,386 1,187,762 110,141 — 516,779 3,457,990 2021 3,428,937 62,687 1,427,674 32,115 1,640,022 (637,759) — (203,359) 2,769,595 2020 2,871,392 91,293 1,237,573 35,602 1,325,526 365,710 — 29,436 3,298,800 (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 due to the retirement of a NEO; 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) The non-PEO NEOs for each of the years shown were as follows: • 2022: Messrs. Garvin and Mastoris, and Mmes. Liu and Kelsey • 2021: Messrs. Lauber and Garvin, and Mmes. Liu and Kelsey • 2020: Messrs. Lauber, Garvin, and Metcalfe, and Mmes. Liu and Kelsey (4) 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. (5) 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. The Compensation Committee determined that PG&E was no longer an appropriate peer comparison and approved its removal from, and the addition of Dominion Energy, Inc. to, the 2022 Custom Peer Index Group. Prior to these changes, the Custom Peer Index Group TSR would have been $115.80 for 2022. For information about the Custom Peer Index Group, including the changes made, see “Compensation Discussion and Analysis – Long-Term Incentive Compensation”. | |||||
| Company Selected Measure Name | Earnings Per Share(diluted) | |||||
| Named Executive Officers, Footnote [Text Block] | The non-PEO NEOs for each of the years shown were as follows: • 2022: Messrs. Garvin and Mastoris, and Mmes. Liu and Kelsey • 2021: Messrs. Lauber and Garvin, and Mmes. Liu and Kelsey • 2020: Messrs. Lauber, Garvin, and Metcalfe, and Mmes. Liu and Kelsey | |||||
| Peer Group Issuers, Footnote [Text Block] | 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. The Compensation Committee determined that PG&E was no longer an appropriate peer comparison and approved its removal from, and the addition of Dominion Energy, Inc. to, the 2022 Custom Peer Index Group. Prior to these changes, the Custom Peer Index Group TSR would have been $115.80 for 2022. For information about the Custom Peer Index Group, including the changes made, see “Compensation Discussion and Analysis – Long-Term Incentive Compensation”. | |||||
| Adjustment To PEO Compensation, Footnote [Text Block] | 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 Fletcher, and the average CAP to our non-PEO NEOs, the following adjustments were made to the SCT total compensation for the applicable fiscal year: SCT to CAP Reconciliation Year SCT Total Deductions from SCT Total Additions to SCT Total CAP Change in (a) (b) (c)(i) (c)(ii) (c)(iii) (c)(iv) Lauber SCT to CAP Reconciliation 2022 8,149,461 101,995 3,677,045 47,302 4,020,237 242,593 — 1,040,675 9,721,228 2021 — — — — — — — — — 2020 — — — — — — — — — Fletcher SCT to CAP Reconciliation 2022 8,151,511 1,979,992 4,288,062 12,250,001 — — 1,481,678 1,717,811 17,332,947 2021 18,481,871 11,056,456 3,241,666 8,455,950 3,723,169 (1,556,840) — (556,377) 14,249,651 2020 18,136,171 11,037,728 3,109,135 7,556,108 3,386,570 633,130 — 25,740 15,590,856 Average Non-PEO NEOs SCT to CAP Reconciliation 2022 2,729,967 26,676 1,086,369 26,386 1,187,762 110,141 — 516,779 3,457,990 2021 3,428,937 62,687 1,427,674 32,115 1,640,022 (637,759) — (203,359) 2,769,595 2020 2,871,392 91,293 1,237,573 35,602 1,325,526 365,710 — 29,436 3,298,800 (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 due to the retirement of a NEO; and (iv) the amount equal to the change as of the vesting date (from | |||||
| Non-PEO NEO Average Total Compensation Amount | [1] | $ 2,729,967 | $ 3,428,937 | $ 2,871,392 | ||
| Non-PEO NEO Average Compensation Actually Paid Amount | [1],[2] | $ 3,457,990 | 2,769,595 | 3,298,800 | ||
| Adjustment to Non-PEO NEO Compensation Footnote [Text Block] | 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 Fletcher, and the average CAP to our non-PEO NEOs, the following adjustments were made to the SCT total compensation for the applicable fiscal year: SCT to CAP Reconciliation Year SCT Total Deductions from SCT Total Additions to SCT Total CAP Change in (a) (b) (c)(i) (c)(ii) (c)(iii) (c)(iv) Lauber SCT to CAP Reconciliation 2022 8,149,461 101,995 3,677,045 47,302 4,020,237 242,593 — 1,040,675 9,721,228 2021 — — — — — — — — — 2020 — — — — — — — — — Fletcher SCT to CAP Reconciliation 2022 8,151,511 1,979,992 4,288,062 12,250,001 — — 1,481,678 1,717,811 17,332,947 2021 18,481,871 11,056,456 3,241,666 8,455,950 3,723,169 (1,556,840) — (556,377) 14,249,651 2020 18,136,171 11,037,728 3,109,135 7,556,108 3,386,570 633,130 — 25,740 15,590,856 Average Non-PEO NEOs SCT to CAP Reconciliation 2022 2,729,967 26,676 1,086,369 26,386 1,187,762 110,141 — 516,779 3,457,990 2021 3,428,937 62,687 1,427,674 32,115 1,640,022 (637,759) — (203,359) 2,769,595 2020 2,871,392 91,293 1,237,573 35,602 1,325,526 365,710 — 29,436 3,298,800 (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 due to the retirement of a NEO; and (iv) the amount equal to the change as of the vesting date (from | |||||
| Compensation Actually Paid vs. Total Shareholder Return [Text Block] | 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 WEC Energy Group’s TSR performance. A substantial portion of the compensation awarded to each of the NEOs is long-term incentive compensation. WEC Energy Group performance unit awards comprise 65% of the long-term incentive compensation granted each year, with vesting primarily based upon WEC Energy Group’s TSR performance against its peer group. As discussed further in “Compensation Discussion and Analysis,” the performance units granted in 2020, which vested at the end of the three-year performance period ended December 31, 2022, provided a payout that was less than target. See the Five-Year Cumulative Return and Total Stockholder Returns graphs in “Compensation Discussion and Analysis – Executive Summary” for information on WEC Energy Group’s TSR performance over the 5- and 10-year periods ended December 31, 2022, which exceeded the performance of its peer group. | |||||
| Compensation Actually Paid vs. Net Income [Text Block] | CAP v. WEC Net Income and Earnings Per Share (Company-Selected Measure) As demonstrated by the following graphs, during the cumulative three-year period ended December 31, 2022, the compensation paid to the PEOs and the average compensation paid to the other NEOs was aligned with WEC Energy Group’s net income and EPS performance. Pursuant to the terms of WEC Energy Group’s short-term performance plan, almost 75% of the payout was based upon WEC Energy Group’s performance against EPS goals, of which net income is a key component. Almost 25% was based upon WEC Energy Group’s performance against cash flow goals. As discussed further in “Compensation Discussion and Analysis,” for 2022, the target level payout under WEC Energy Group’s short-term performance plan with respect to EPS was set at the high end of its long-term EPS growth goal, and the maximum payout was set above the long-term EPS growth goal. WEC Energy Group’s strong performance against the EPS and cash flow goals in 2022 resulted in maximum level payouts for each measure. | |||||
| Compensation Actually Paid vs. Company Selected Measure [Text Block] | ||||||
| Tabular List [Table Text Block] | Most Important Performance Measures The following represents the most important financial performance measures used by WEC Energy Group and the Company to link compensation actually paid to each NEO for the most recently completed fiscal year to company performance: WEC Earnings Per Share WEC Net Income WEC Cash Flow Return on Equity of Achievement of WEC Energy Group’s goals with respect to the financial measures highlighted above should drive strong TSR performance for WEC Energy Group relative to its peers, which is an important component of the compensation program as more fully described in “Compensation Discussion and Analysis – Long-Term Incentive Compensation”. | |||||
| Total Shareholder Return Amount | [3] | $ 110.8 | 111.34 | 102.49 | ||
| Peer Group Total Shareholder Return Amount | [4] | 111.03 | 110.07 | 95.94 | ||
| Net Income (Loss) | $ 1,408,100,000 | $ 1,300,300,000 | $ 1,199,900,000 | |||
| Company Selected Measure Amount | 4.45 | 4.11 | 3.79 | |||
| PEO Name | Mr. Lauber | Mr. Fletcher | ||||
| Measure [Axis]: 1 | ||||||
| Pay vs Performance Disclosure [Table] | ||||||
| Measure Name | WEC Earnings Per Share | |||||
| Measure [Axis]: 2 | ||||||
| Pay vs Performance Disclosure [Table] | ||||||
| Measure Name | WEC Net Income | |||||
| Measure [Axis]: 3 | ||||||
| Pay vs Performance Disclosure [Table] | ||||||
| Measure Name | WEC Cash Flow | |||||
| Measure [Axis]: 4 | ||||||
| Pay vs Performance Disclosure [Table] | ||||||
| Measure Name | Return on Equity ofWEC Utilities | |||||
| Lauber [Member] | ||||||
| Pay vs Performance Disclosure [Table] | ||||||
| PEO Total Compensation Amount | [5] | $ 8,149,461 | ||||
| PEO Actually Paid Compensation Amount | [2],[5] | 9,721,228 | ||||
| Fletcher [Member] | ||||||
| Pay vs Performance Disclosure [Table] | ||||||
| PEO Total Compensation Amount | [5] | 8,151,511 | $ 18,481,871 | $ 18,136,171 | ||
| PEO Actually Paid Compensation Amount | [2],[5] | 17,332,947 | 14,249,651 | 15,590,856 | ||
| PEO [Member] | Lauber [Member] | Change in Pension Value [Member] | ||||||
| Pay vs Performance Disclosure [Table] | ||||||
| Adjustment to Compensation Amount | 101,995 | |||||
| PEO [Member] | Lauber [Member] | Equity-based Awards Grant Date Fair Value [Member] | ||||||
| Pay vs Performance Disclosure [Table] | ||||||
| Adjustment to Compensation Amount | [6] | 3,677,045 | ||||
| PEO [Member] | Lauber [Member] | Pension Benefit Service Costs [Member] | ||||||
| Pay vs Performance Disclosure [Table] | ||||||
| Adjustment to Compensation Amount | [7] | 47,302 | ||||
| PEO [Member] | Lauber [Member] | Change in Value of Covered Fiscal Year Unvested [Member] | ||||||
| Pay vs Performance Disclosure [Table] | ||||||
| Adjustment to Compensation Amount | [8] | 4,020,237 | ||||
| PEO [Member] | Lauber [Member] | Change in Value of Prior Years Unvested [Member] | ||||||
| Pay vs Performance Disclosure [Table] | ||||||
| Adjustment to Compensation Amount | [8] | 242,593 | ||||
| PEO [Member] | Lauber [Member] | Change in Value of Prior Years Vested [Member] | ||||||
| Pay vs Performance Disclosure [Table] | ||||||
| Adjustment to Compensation Amount | [8] | 1,040,675 | ||||
| PEO [Member] | Fletcher [Member] | Change in Pension Value [Member] | ||||||
| Pay vs Performance Disclosure [Table] | ||||||
| Adjustment to Compensation Amount | 1,979,992 | 11,056,456 | 11,037,728 | |||
| PEO [Member] | Fletcher [Member] | Equity-based Awards Grant Date Fair Value [Member] | ||||||
| Pay vs Performance Disclosure [Table] | ||||||
| Adjustment to Compensation Amount | [6] | 4,288,062 | 3,241,666 | 3,109,135 | ||
| PEO [Member] | Fletcher [Member] | Pension Benefit Service Costs [Member] | ||||||
| Pay vs Performance Disclosure [Table] | ||||||
| Adjustment to Compensation Amount | [7] | 12,250,001 | 8,455,950 | 7,556,108 | ||
| PEO [Member] | Fletcher [Member] | Change in Value of Covered Fiscal Year Unvested [Member] | ||||||
| Pay vs Performance Disclosure [Table] | ||||||
| Adjustment to Compensation Amount | [8] | 3,723,169 | 3,386,570 | |||
| PEO [Member] | Fletcher [Member] | Change in Value of Prior Years Unvested [Member] | ||||||
| Pay vs Performance Disclosure [Table] | ||||||
| Adjustment to Compensation Amount | [8] | (1,556,840) | 633,130 | |||
| PEO [Member] | Fletcher [Member] | Change in Value of Prior Years Vested [Member] | ||||||
| Pay vs Performance Disclosure [Table] | ||||||
| Adjustment to Compensation Amount | [8] | 1,717,811 | (556,377) | 25,740 | ||
| PEO [Member] | Fletcher [Member] | Value of Awards Granted and Vested in Covered Fiscal Year [Member] | ||||||
| Pay vs Performance Disclosure [Table] | ||||||
| Adjustment to Compensation Amount | [8] | 1,481,678 | ||||
| Non-PEO NEO [Member] | Change in Pension Value [Member] | ||||||
| Pay vs Performance Disclosure [Table] | ||||||
| Adjustment to Compensation Amount | 26,676 | 62,687 | 91,293 | |||
| Non-PEO NEO [Member] | Equity-based Awards Grant Date Fair Value [Member] | ||||||
| Pay vs Performance Disclosure [Table] | ||||||
| Adjustment to Compensation Amount | [6] | 1,086,369 | 1,427,674 | 1,237,573 | ||
| Non-PEO NEO [Member] | Pension Benefit Service Costs [Member] | ||||||
| Pay vs Performance Disclosure [Table] | ||||||
| Adjustment to Compensation Amount | [7] | 26,386 | 32,115 | 35,602 | ||
| Non-PEO NEO [Member] | Change in Value of Covered Fiscal Year Unvested [Member] | ||||||
| Pay vs Performance Disclosure [Table] | ||||||
| Adjustment to Compensation Amount | [8] | 1,187,762 | 1,640,022 | 1,325,526 | ||
| Non-PEO NEO [Member] | Change in Value of Prior Years Unvested [Member] | ||||||
| Pay vs Performance Disclosure [Table] | ||||||
| Adjustment to Compensation Amount | [8] | 110,141 | (637,759) | 365,710 | ||
| Non-PEO NEO [Member] | Change in Value of Prior Years Vested [Member] | ||||||
| Pay vs Performance Disclosure [Table] | ||||||
| Adjustment to Compensation Amount | [8] | $ 516,779 | $ (203,359) | $ 29,436 | ||
| [1]The non-PEO NEOs for each of the years shown were as follows: • 2022: Messrs. Garvin and Mastoris, and Mmes. Liu and Kelsey • 2021: Messrs. Lauber and Garvin, and Mmes. Liu and Kelsey • 2020: Messrs. Lauber, Garvin, and Metcalfe, and Mmes. Liu and Kelsey SCT to CAP Reconciliation Year SCT Total Deductions from SCT Total Additions to SCT Total CAP Change in (a) (b) (c)(i) (c)(ii) (c)(iii) (c)(iv) Lauber SCT to CAP Reconciliation 2022 8,149,461 101,995 3,677,045 47,302 4,020,237 242,593 — 1,040,675 9,721,228 2021 — — — — — — — — — 2020 — — — — — — — — — Fletcher SCT to CAP Reconciliation 2022 8,151,511 1,979,992 4,288,062 12,250,001 — — 1,481,678 1,717,811 17,332,947 2021 18,481,871 11,056,456 3,241,666 8,455,950 3,723,169 (1,556,840) — (556,377) 14,249,651 2020 18,136,171 11,037,728 3,109,135 7,556,108 3,386,570 633,130 — 25,740 15,590,856 Average Non-PEO NEOs SCT to CAP Reconciliation 2022 2,729,967 26,676 1,086,369 26,386 1,187,762 110,141 — 516,779 3,457,990 2021 3,428,937 62,687 1,427,674 32,115 1,640,022 (637,759) — (203,359) 2,769,595 2020 2,871,392 91,293 1,237,573 35,602 1,325,526 365,710 — 29,436 3,298,800 (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 due to the retirement of a NEO; and (iv) the amount equal to the change as of the vesting date (from (c) | ||||||
