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v3.22.1

Investment in Unconsolidated Affiliates Related Party Transactions (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2022 | Mar. 31, 2021 | Dec. 31, 2021
Related Party Transaction [Line Items] |  |  |
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party | $ 32.9 | $ 35.8 |
Enable Midstream Partners [Member] | OG&E [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Revenue from Related Parties |  | 2.6 |
Operating Costs Charged [Member] | Enable Midstream Partners [Member] | OGE Energy [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party |  | 0.1 |
Natural Gas Transportation [Member] | Enable Midstream Partners [Member] | OG&E [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Related Party Transaction, Purchases from Related Party |  | 4.7 |
Natural Gas Purchases [Member] | Enable Midstream Partners [Member] | OG&E [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Related Party Transaction, Purchases from Related Party |  | $ (12.2) |
Excluding Fuel Purchases [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Accounts receivable - unconsolidated affiliates |  |  | $ 0.3

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