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BUSINESS SEGMENTS (Tables)
 3 Months Ended
Mar. 31, 2026
Segment Reporting [Abstract]  
Schedule of Reportable Segment Information
The tables below represent AEP’s reportable segment income statement information for the three months ended March 31, 2026 and 2025 and reportable segment balance sheet information as of March 31, 2026 and December 31, 2025. The significant expenses disclosed below align with the segment-level information that is regularly provided to the CODM.
Three Months Ended March 31, 2026
VIUT&DAEPTHCoG&MTotal Reportable SegmentsCorporate and Other (a)Reconciling AdjustmentsConsolidated
(in millions)
Revenues from:
External Customers$3,365 $1,594 $127 $931 $6,017 $3 $— $6,020 
Other Operating Segments75 15 471 21 582 28 (610)(b)— 
Total Revenues3,440 1,609 598 952 6,599 31 (610)6,020 
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation1,075 271 — 854 2,200 — (82)2,118 
Other Operation and Maintenance1,017 580 53 9 1,659 38 (536)1,161 
Asset Impairments and Other Related Charges31 — — — 31 — — 31 
Depreciation and Amortization559 217 131 5 912 (5)— 907 
Taxes Other Than Income Taxes144 200 90 1 435 — 8 443 
Allowance for Equity Funds Used During Construction23 25 22 — 70 — — 70 
Interest Expense245 105 69 1 420 166 (34)552 
Income Tax Expense (Benefit)(48)40 67 22 81 (37)— 44 
Equity Earnings of Unconsolidated Subsidiaries— — 25 — 25 — — 25 
Other Segment Items (c)(22)(16)26 (15)(27)(22)34 (15)
Earnings (Loss) Attributable to AEP Common Shareholders$462 $237 $209 $75 $983 $(109)$— $874 
Gross Property Additions$2,143 $1,061 $433 $5 $3,642 $147 $6 $3,795 

Three Months Ended March 31, 2025
VIUT&DAEPTHCoG&MTotal Reportable SegmentsCorporate and Other (a)Reconciling AdjustmentsConsolidated
(in millions)
Revenues from:
External Customers$3,086 $1,515 $116 $730 $5,447 $16 $— $5,463 
Other Operating Segments52 12 426 17 507 28 (535)(b)— 
Total Revenues3,138 1,527 542 747 5,954 44 (535)5,463 
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation1,075 263 — 583 1,921 — (68)1,853 
Other Operation and Maintenance884 577 37 30 1,528 16 (473)1,071 
Depreciation and Amortization515 203 116 4 838 (5)— 833 
Taxes Other Than Income Taxes134 205 75 1 415 1 6 422 
Allowance for Equity Funds Used During Construction16 19 22 — 57 — — 57 
Interest Expense200 112 57 2 371 147 (23)495 
Income Tax Expense (Benefit)45 34 67 36 182 (57)— 125 
Equity Earnings of Unconsolidated Subsidiaries— 1 24 — 25 13 — 38 
Other Segment Items (c)(23)(12)1 (11)(45)(19)23 (41)
Earnings (Loss) Attributable to AEP Common Shareholders$324 $165 $235 $102 $826 $(26)$— $800 
Gross Property Additions$921 $704 $430 $4 $2,059 $30 $11 $2,100 
March 31, 2026
VIUT&DAEPTHCoG&MTotal Reportable SegmentsCorporate and Other (a)Reconciling AdjustmentsConsolidated
(in millions)
Total Assets$63,757 $30,250 $20,277 $2,598 $116,882 $6,451 (d)$(5,557)(e)$117,776 
Investments in Equity Method Investees$9 $4 $1,090 $— $1,103 $196 $— $1,299 

December 31, 2025
VIUT&DAEPTHCoG&MTotal Reportable SegmentsCorporate and Other (a)Reconciling AdjustmentsConsolidated
(in millions)
Total Assets$61,778 $29,272 $19,719 $2,003 $112,772 $6,733 (d)$(5,045)(e)$114,460 
Investments in Equity Method Investees$9 $4 $1,068 $— $1,081 $171 $— $1,252 

(a)Corporate and Other primarily includes the purchasing of receivables from certain AEP utility subsidiaries. This segment also includes Parent’s guarantee revenue received from affiliates, investment income, interest income and interest expense, income tax expense and other nonallocated costs.
(b)Represents inter-segment revenues.
(c)Other segment items included in segment earnings (loss) attributable to AEP common shareholders primarily includes Interest and Dividend Income, Non-Service Cost Components of Net Periodic Benefit Cost and Net Income (Loss) Attributable to Noncontrolling Interests.
(d)Includes elimination of AEP Parent’s investments in wholly-owned subsidiary companies.
(e)Reconciling Adjustments for Total Assets primarily include elimination of intercompany advances to affiliates and intercompany accounts receivable.
The tables below present AEPTCo’s reportable segment income statement information for the three months ended March 31, 2026 and 2025 and reportable segment balance sheet information as of March 31, 2026 and December 31, 2025. The significant expenses disclosed below align with the segment-level information that is regularly provided to the CODM.
Three Months Ended March 31, 2026
State TranscosAEPTCo ParentReconciling AdjustmentsAEPTCo
Consolidated
(in millions)
Revenues from:
External Customers
$110 $— $— $110 
Sales to AEP Affiliates
468 — — 468 
Total Revenues578 — — 578 
Other Operation and Maintenance51 — — 51 
Depreciation and Amortization
128 — — 128 
Taxes Other Than Income Taxes88 — — 88 
Interest Income
1 73 (72)(a)2 
Allowance for Equity Funds Used During Construction 22 — — 22 
Interest Expense 65 72 (72)(a)65 
Income Tax Expense60 — — 60 
Other Segment Items (b)— 27 — 27 
Earnings (Loss) Attributable to AEPTCo Common Shareholders$209 $(26)(c)$— $183 
Gross Property Additions$403 $— $— $403 

Three Months Ended March 31, 2025
State TranscosAEPTCo ParentReconciling AdjustmentsAEPTCo
Consolidated
(in millions)
Revenues from:
External Customers
$104 $— $— $104 
Sales to AEP Affiliates
423 — — 423 
Total Revenues527 — — 527 
Other Operation and Maintenance34 — — 34 
Depreciation and Amortization
114 — — 114 
Taxes Other Than Income Taxes74 — — 74 
Interest Income
— 89 (89)(a)— 
Allowance for Equity Funds Used During Construction 22 — — 22 
Interest Expense 84 60 (89)(a)55 
Income Tax Expense61 — — 61 
Earnings Attributable to AEPTCo Common Shareholders$182 $29 (c)$— $211 
Gross Property Additions$422 $— $— $422 

March 31, 2026
State TranscosAEPTCo ParentReconciling AdjustmentsAEPTCo
Consolidated
(in millions)
Total Assets $18,456 $6,997 (d)$(6,922)(e)$18,531 
December 31, 2025
State TranscosAEPTCo ParentReconciling AdjustmentsAEPTCo
Consolidated
(in millions)
Total Assets $17,983 $6,766 (d)$(6,750)(e)$17,999 

(a)Elimination of intercompany interest income/interest expense on affiliated debt arrangement.
(b)Other segment items included in segment earnings (loss) attributable to AEPTCo common shareholders primarily includes Net Income (Loss) Attributable to Noncontrolling Interests.
(c)Includes elimination of AEPTCo Parent’s equity earnings in the State Transcos.
(d)Primarily relates to Notes Receivable from the State Transcos.
(e)Primarily relates to elimination of Notes Receivable from the State Transcos.