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Voluntary Severance Program (Tables)
3 Months Ended
Jun. 30, 2024
Restructuring and Related Activities [Abstract]  
Restructuring and Related Costs
AEPAEP TexasAEPTCoAPCoI&MOPCoPSOSWEPCo
(in millions)
Severance Expense Incurred$122.0 $19.8 $10.7 $26.5 $14.8 $14.8 $10.1 $16.9