CONSOLIDATED BALANCE SHEETS - PSO (Parenthetical) - $ / shares	Dec. 31, 2024	Dec. 31, 2023
Common Stock – Par Value (in USD per share)	$ 6.50	$ 6.50
Common Stock – Shares Authorized (in shares)	600,000,000	600,000,000
Common Stock – Shares Issued (in shares)	534,094,530	527,369,157
PUBLIC SERVICE COMPANY OF OKLAHOMA
Common Stock – Par Value (in USD per share)	$ 15	$ 15
Common Stock – Shares Authorized (in shares)	11,000,000	11,000,000
Common Stock – Shares Issued (in shares)	10,482,000	10,482,000
Common Stock – Shares Outstanding (in shares)	9,013,000	9,013,000