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Investment in Unconsolidated Affiliates (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Limited Liability Company or Limited Partnership, Members or Limited Partners, Ownership Interest		25.50%		25.50%
Distributions from unconsolidated affiliates	$ 4.0		$ 34.0
Equity in earnings of unconsolidated affiliates	$ 0.0	$ 41.2	$ 0.0	$ 127.9
OG&E [Member] | Enable Midstream Partners [Member]
Revenue from Related Parties		4.1		10.0
OG&E [Member] | Enable Midstream Partners [Member] | Natural Gas Transportation [Member]
Related Party Transaction, Purchases from Related Party		9.4		23.4
OG&E [Member] | Enable Midstream Partners [Member] | Natural Gas Purchases [Member]
Related Party Transaction, Purchases from Related Party		$ (7.7)		$ (28.3)

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