FAIR VALUE MEASUREMENTS - Plan Assets within the Fair Value Hierarchy (Details) - EBP 002 - USD ($)
|
Dec. 31, 2025 |
Dec. 31, 2024 |
| EBP, Investment, Fair Value and NAV [Line Items] |
|
|
| Total Assets Reflecting Investments at Fair Value |
$ 5,249,093,358
|
$ 4,719,489,317
|
| Subtotal Equities |
|
|
| EBP, Investment, Fair Value and NAV [Line Items] |
|
|
| Total Assets Reflecting Investments at Fair Value |
739,773,538
|
808,974,208
|
| Corporate Stocks |
|
|
| EBP, Investment, Fair Value and NAV [Line Items] |
|
|
| Total Assets Reflecting Investments at Fair Value |
455,137,837
|
554,966,516
|
| AEP Stock |
|
|
| EBP, Investment, Fair Value and NAV [Line Items] |
|
|
| Total Assets Reflecting Investments at Fair Value |
284,635,701
|
254,007,692
|
| Subtotal Common/Collective Trusts |
|
|
| EBP, Investment, Fair Value and NAV [Line Items] |
|
|
| Total Assets Reflecting Investments at Fair Value |
4,300,709,312
|
3,731,155,137
|
| Mellon Capital Small Cap Stock Index Fund |
|
|
| EBP, Investment, Fair Value and NAV [Line Items] |
|
|
| Total Assets Reflecting Investments at Fair Value |
184,851,859
|
169,951,861
|
| Mellon Capital Mid Cap Stock Index Fund |
|
|
| EBP, Investment, Fair Value and NAV [Line Items] |
|
|
| Total Assets Reflecting Investments at Fair Value |
497,527,654
|
459,321,305
|
| Mellon Capital Stock Index Fund |
|
|
| EBP, Investment, Fair Value and NAV [Line Items] |
|
|
| Total Assets Reflecting Investments at Fair Value |
1,636,050,967
|
1,429,311,150
|
| Mellon Capital International Stock Index Fund |
|
|
| EBP, Investment, Fair Value and NAV [Line Items] |
|
|
| Total Assets Reflecting Investments at Fair Value |
808,582,002
|
690,699,519
|
| Mellon Capital Aggregate Bond Index Fund |
|
|
| EBP, Investment, Fair Value and NAV [Line Items] |
|
|
| Total Assets Reflecting Investments at Fair Value |
563,690,929
|
511,889,594
|
| Mellon Capital Treasury Inflation-Protected Securities Fund |
|
|
| EBP, Investment, Fair Value and NAV [Line Items] |
|
|
| Total Assets Reflecting Investments at Fair Value |
25,940,172
|
24,183,840
|
| JPMorgan Strategic Property Fund |
|
|
| EBP, Investment, Fair Value and NAV [Line Items] |
|
|
| Total Assets Reflecting Investments at Fair Value |
100,832,017
|
84,071,443
|
| Mellon Capital Emerging Markets Stock Index Fund |
|
|
| EBP, Investment, Fair Value and NAV [Line Items] |
|
|
| Total Assets Reflecting Investments at Fair Value |
78,733,000
|
65,013,298
|
| William Blair Large Cap Growth I |
|
|
| EBP, Investment, Fair Value and NAV [Line Items] |
|
|
| Total Assets Reflecting Investments at Fair Value |
220,689,466
|
214,753,054
|
| Sands Capital International Growth CIT |
|
|
| EBP, Investment, Fair Value and NAV [Line Items] |
|
|
| Total Assets Reflecting Investments at Fair Value |
25,266,348
|
22,073,747
|
| MetWest Total Return Bond Fund |
|
|
| EBP, Investment, Fair Value and NAV [Line Items] |
|
|
| Total Assets Reflecting Investments at Fair Value |
65,767,921
|
59,886,326
|
| Common Collective Trust, William Blair SMID Cap Growth CIT |
|
|
| EBP, Investment, Fair Value and NAV [Line Items] |
|
|
| Total Assets Reflecting Investments at Fair Value |
46,456,678
|
|
| Common Collective Trust, Conestoga SMID Cap Growth CIT |
|
|
| EBP, Investment, Fair Value and NAV [Line Items] |
|
|
| Total Assets Reflecting Investments at Fair Value |
46,320,299
|
|
| Self-Directed Brokerage Account |
|
|
| EBP, Investment, Fair Value and NAV [Line Items] |
|
|
| Total Assets Reflecting Investments at Fair Value |
149,520,188
|
120,451,987
|
| Registered Investment Companies |
|
|
| EBP, Investment, Fair Value and NAV [Line Items] |
|
|
| Total Assets Reflecting Investments at Fair Value |
25,678,572
|
22,131,794
|
| Money Market Fund |
|
|
| EBP, Investment, Fair Value and NAV [Line Items] |
|
|
| Total Assets Reflecting Investments at Fair Value |
33,411,748
|
36,776,191
|
| Level 1 |
|
|
| EBP, Investment, Fair Value and NAV [Line Items] |
|
|
| Total Assets Reflecting Investments at Fair Value |
948,384,046
|
975,138,188
|
| Level 1 | Subtotal Equities |
|
|
| EBP, Investment, Fair Value and NAV [Line Items] |
|
|
| Total Assets Reflecting Investments at Fair Value |
739,773,538
|
808,974,208
|
| Level 1 | Corporate Stocks |
|
|
| EBP, Investment, Fair Value and NAV [Line Items] |
|
|
| Total Assets Reflecting Investments at Fair Value |
455,137,837
|
554,966,516
|
| Level 1 | AEP Stock |
|
|
| EBP, Investment, Fair Value and NAV [Line Items] |
|
|
| Total Assets Reflecting Investments at Fair Value |
284,635,701
|
254,007,692
|
| Level 1 | Self-Directed Brokerage Account |
|
|
| EBP, Investment, Fair Value and NAV [Line Items] |
|
|
| Total Assets Reflecting Investments at Fair Value |
149,520,188
|
107,255,995
|
| Level 1 | Registered Investment Companies |
|
|
| EBP, Investment, Fair Value and NAV [Line Items] |
|
|
| Total Assets Reflecting Investments at Fair Value |
25,678,572
|
22,131,794
|
| Level 1 | Money Market Fund |
|
|
| EBP, Investment, Fair Value and NAV [Line Items] |
|
|
| Total Assets Reflecting Investments at Fair Value |
33,411,748
|
36,776,191
|
| Level 2 |
|
|
| EBP, Investment, Fair Value and NAV [Line Items] |
|
|
| Total Assets Reflecting Investments at Fair Value |
0
|
0
|
| Level 2 | Subtotal Equities |
|
|
| EBP, Investment, Fair Value and NAV [Line Items] |
|
|
| Total Assets Reflecting Investments at Fair Value |
0
|
0
|
| Level 2 | Corporate Stocks |
|
|
| EBP, Investment, Fair Value and NAV [Line Items] |
|
|
| Total Assets Reflecting Investments at Fair Value |
0
|
0
|
| Level 2 | AEP Stock |
|
|
| EBP, Investment, Fair Value and NAV [Line Items] |
|
|
| Total Assets Reflecting Investments at Fair Value |
0
|
0
|
| Level 2 | Self-Directed Brokerage Account |
|
|
| EBP, Investment, Fair Value and NAV [Line Items] |
|
|
| Total Assets Reflecting Investments at Fair Value |
0
|
0
|
| Level 2 | Registered Investment Companies |
|
|
| EBP, Investment, Fair Value and NAV [Line Items] |
|
|
| Total Assets Reflecting Investments at Fair Value |
0
|
0
|
| Level 2 | Money Market Fund |
|
|
| EBP, Investment, Fair Value and NAV [Line Items] |
|
|
| Total Assets Reflecting Investments at Fair Value |
0
|
0
|
| Level 3 |
|
|
| EBP, Investment, Fair Value and NAV [Line Items] |
|
|
| Total Assets Reflecting Investments at Fair Value |
0
|
0
|
| Level 3 | Subtotal Equities |
|
|
| EBP, Investment, Fair Value and NAV [Line Items] |
|
|
| Total Assets Reflecting Investments at Fair Value |
0
|
0
|
| Level 3 | Corporate Stocks |
|
|
| EBP, Investment, Fair Value and NAV [Line Items] |
|
|
| Total Assets Reflecting Investments at Fair Value |
0
|
0
|
| Level 3 | AEP Stock |
|
|
| EBP, Investment, Fair Value and NAV [Line Items] |
|
|
| Total Assets Reflecting Investments at Fair Value |
0
|
0
|
| Level 3 | Self-Directed Brokerage Account |
|
|
| EBP, Investment, Fair Value and NAV [Line Items] |
|
|
| Total Assets Reflecting Investments at Fair Value |
0
|
0
|
| Level 3 | Registered Investment Companies |
|
|
| EBP, Investment, Fair Value and NAV [Line Items] |
|
|
| Total Assets Reflecting Investments at Fair Value |
0
|
0
|
| Level 3 | Money Market Fund |
|
|
| EBP, Investment, Fair Value and NAV [Line Items] |
|
|
| Total Assets Reflecting Investments at Fair Value |
0
|
0
|
| Other |
|
|
| EBP, Investment, Fair Value and NAV [Line Items] |
|
|
| Total Assets Reflecting Investments at Fair Value |
4,300,709,312
|
3,744,351,129
|
| Other | Subtotal Common/Collective Trusts |
|
|
| EBP, Investment, Fair Value and NAV [Line Items] |
|
|
| Total Assets Reflecting Investments at Fair Value |
4,300,709,312
|
3,731,155,137
|
| Other | Mellon Capital Small Cap Stock Index Fund |
|
|
| EBP, Investment, Fair Value and NAV [Line Items] |
|
|
| Total Assets Reflecting Investments at Fair Value |
184,851,859
|
169,951,861
|
| Other | Mellon Capital Mid Cap Stock Index Fund |
|
|
| EBP, Investment, Fair Value and NAV [Line Items] |
|
|
| Total Assets Reflecting Investments at Fair Value |
497,527,654
|
459,321,305
|
| Other | Mellon Capital Stock Index Fund |
|
|
| EBP, Investment, Fair Value and NAV [Line Items] |
|
|
| Total Assets Reflecting Investments at Fair Value |
1,636,050,967
|
1,429,311,150
|
| Other | Mellon Capital International Stock Index Fund |
|
|
| EBP, Investment, Fair Value and NAV [Line Items] |
|
|
| Total Assets Reflecting Investments at Fair Value |
808,582,002
|
690,699,519
|
| Other | Mellon Capital Aggregate Bond Index Fund |
|
|
| EBP, Investment, Fair Value and NAV [Line Items] |
|
|
| Total Assets Reflecting Investments at Fair Value |
563,690,929
|
511,889,594
|
| Other | Mellon Capital Treasury Inflation-Protected Securities Fund |
|
|
| EBP, Investment, Fair Value and NAV [Line Items] |
|
|
| Total Assets Reflecting Investments at Fair Value |
25,940,172
|
24,183,840
|
| Other | JPMorgan Strategic Property Fund |
|
|
| EBP, Investment, Fair Value and NAV [Line Items] |
|
|
| Total Assets Reflecting Investments at Fair Value |
100,832,017
|
84,071,443
|
| Other | Mellon Capital Emerging Markets Stock Index Fund |
|
|
| EBP, Investment, Fair Value and NAV [Line Items] |
|
|
| Total Assets Reflecting Investments at Fair Value |
78,733,000
|
65,013,298
|
| Other | William Blair Large Cap Growth I |
|
|
| EBP, Investment, Fair Value and NAV [Line Items] |
|
|
| Total Assets Reflecting Investments at Fair Value |
220,689,466
|
214,753,054
|
| Other | Sands Capital International Growth CIT |
|
|
| EBP, Investment, Fair Value and NAV [Line Items] |
|
|
| Total Assets Reflecting Investments at Fair Value |
25,266,348
|
22,073,747
|
| Other | MetWest Total Return Bond Fund |
|
|
| EBP, Investment, Fair Value and NAV [Line Items] |
|
|
| Total Assets Reflecting Investments at Fair Value |
65,767,921
|
59,886,326
|
| Other | Common Collective Trust, William Blair SMID Cap Growth CIT |
|
|
| EBP, Investment, Fair Value and NAV [Line Items] |
|
|
| Total Assets Reflecting Investments at Fair Value |
46,456,678
|
|
| Other | Common Collective Trust, Conestoga SMID Cap Growth CIT |
|
|
| EBP, Investment, Fair Value and NAV [Line Items] |
|
|
| Total Assets Reflecting Investments at Fair Value |
$ 46,320,299
|
|
| Other | Self-Directed Brokerage Account |
|
|
| EBP, Investment, Fair Value and NAV [Line Items] |
|
|
| Total Assets Reflecting Investments at Fair Value |
|
$ 13,195,992
|