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SEGMENT INFORMATION (Tables)
6 Months Ended
Jun. 30, 2023
Segment Reporting [Abstract]  
Schedule of financial information related to our reportable segments The following tables show summarized financial information related to our reportable segments for the three and six months ended June 30, 2023 and 2022:
Utility Operations
(in millions)WisconsinIllinoisOther StatesTotal Utility OperationsElectric TransmissionNon-Utility Energy InfrastructureCorporate and OtherReconciling EliminationsWEC Energy Group Consolidated
Three Months Ended June 30, 2023
External revenues$1,424.5 $273.5 $81.9 $1,779.9 $ $50.0 $0.1 $ $1,830.0 
Intersegment revenues     119.0  (119.0) 
Other operation and maintenance351.8 105.3 21.8 478.9  20.3 0.7 (3.9)496.0 
Depreciation and amortization210.3 58.5 10.6 279.4  48.4 5.2 (19.1)313.9 
Equity in earnings of transmission affiliates    43.6    43.6 
Interest expense150.1 21.4 4.1 175.6 4.8 25.1 62.0 (88.8)178.7 
Income tax expense (benefit)53.6 10.9 1.3 65.8 9.7 (19.7)(7.3) 48.5 
Net income (loss)185.9 30.1 3.7 219.7 29.1 85.9 (44.7) 290.0 
Net income (loss) attributed to common shareholders185.6 30.1 3.7 219.4 29.1 85.9 (44.7) 289.7 

Utility Operations
(in millions)WisconsinIllinoisOther StatesTotal Utility OperationsElectric TransmissionNon-Utility Energy InfrastructureCorporate and OtherReconciling EliminationsWEC Energy Group Consolidated
Three Months Ended June 30, 2022
External revenues$1,557.4 $442.4 $99.9 $2,099.7 $— $28.1 $0.1 $— $2,127.9 
Intersegment revenues— — — — — 115.5 — (115.5)— 
Other operation and maintenance337.9 79.1 22.9 439.9 — 13.9 (0.9)(3.9)449.0 
Depreciation and amortization187.7 57.4 10.2 255.3 — 34.3 6.8 (16.8)279.6 
Equity in earnings of transmission affiliates— — — — 43.0 — — — 43.0 
Interest expense135.6 18.0 3.2 156.8 4.8 17.4 24.6 (83.8)119.8 
Income tax expense (benefit)49.3 21.2 0.9 71.4 9.3 (7.3)(10.0)— 63.4 
Net income (loss)148.7 56.4 2.7 207.8 29.0 80.3 (29.3)— 287.8 
Net income (loss) attributed to common shareholders148.4 56.4 2.7 207.5 29.0 80.3 (29.3)— 287.5 
Utility Operations
(in millions)WisconsinIllinoisOther StatesTotal Utility OperationsElectric TransmissionNon-Utility Energy InfrastructureCorporate and OtherReconciling EliminationsWEC Energy Group Consolidated
Six Months Ended June 30, 2023
External revenues$3,420.8 $873.2 $331.9 $4,625.9 $ $92.1 $0.1 $ $4,718.1 
Intersegment revenues     243.1  (243.1) 
Other operation and maintenance732.6 219.0 46.5 998.1  38.1 (0.7)(5.5)1,030.0 
Depreciation and amortization417.6 117.0 21.0 555.6  91.1 10.3 (37.6)619.4 
Equity in earnings of transmission affiliates    87.4    87.4 
Interest expense300.7 43.0 8.3 352.0 9.6 45.0 117.6 (173.3)350.9 
Income tax expense (benefit)119.5 52.9 12.5 184.9 19.4 (37.5)(44.2) 122.6 
Net income (loss)443.4 143.2 36.9 623.5 58.4 174.2 (58.5) 797.6 
Net income (loss) attributed to common shareholders442.8 143.2 36.9 622.9 58.4 174.4 (58.5) 797.2 

Utility Operations
(in millions)WisconsinIllinoisOther StatesTotal Utility OperationsElectric TransmissionNon-Utility Energy InfrastructureCorporate and OtherReconciling EliminationsWEC Energy Group Consolidated
Six Months Ended June 30, 2022
External revenues$3,499.7 $1,124.5 $340.8 $4,965.0 $— $70.7 $0.3 $— $5,036.0 
Intersegment revenues— — — — — 232.4 — (232.4)— 
Other operation and maintenance650.5 192.7 47.5 890.7 — 24.8 (6.6)(5.5)903.4 
Depreciation and amortization374.8 114.2 20.2 509.2 — 68.3 13.3 (33.1)557.7 
Equity in earnings of transmission affiliates— — — — 84.7 — — — 84.7 
Interest expense271.9 35.7 6.5 314.1 9.7 34.6 47.2 (168.2)237.4 
Income tax expense (benefit)144.7 63.3 11.3 219.3 18.2 (12.2)(34.8)— 190.5 
Net income (loss)437.1 169.8 34.2 641.1 56.8 173.6 (15.7)— 855.8 
Net income (loss) attributed to common shareholders436.5 169.8 34.2 640.5 56.8 171.8 (15.7)— 853.4