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Related Party Disclosures (Tables)
 12 Months Ended
Dec. 31, 2021
Related Party Transactions [Abstract]  
Schedule of Related Party Transactions [Table Text Block] The following table presents summarized related party transactions between OG&E and Enable during the period of January 1, 2021 through December 2, 2021 and the years ended December 31, 2020 and 2019.
Period of January 1, 2021 through December 2, 2021Year Ended
(In millions)December 31, 2020December 31, 2019
Operating revenues:
Electricity to power electric compression assets$13.3 $15.1 $15.9 
Fuel, purchased power and direct transmission expense:
Natural gas transportation services$32.7 $32.8 $41.2 
Natural gas purchases (sales)$(33.5)$2.7 $(6.0)