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v3.21.2

Related Party Transactions (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020 | Dec. 31, 2020
Related Party Transaction [Line Items] |  |  |  |  |
Distribution Made to Limited Partner, Distributions Declared, Per Unit |  |  | $ 0.16525 |  |
Expected Settlement Charge |  |  | $ 18.1 |  |
Enable Midstream Partners [Member] | OG&E [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Revenue from Related Parties | $ (3.3) | $ (3.5) | (5.9) | $ (7.2) |
OG&E [Member] | OGE Energy [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party | 33.4 | 36.9 | 69.1 | 74.8 |
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 | 0.1 | 0.2 | 0.2 |
Employment Costs [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 | 2.5 | 3.8 | 7.8 | 10.1 |
Natural Gas Transportation [Member] | Enable Midstream Partners [Member] | OG&E [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Related Party Transaction, Purchases from Related Party | 9.3 | 9.4 | 14.0 | 14.1 |
Natural Gas Purchases [Member] | Enable Midstream Partners [Member] | OG&E [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Revenue from Related Parties | (8.4) | $ (1.7) | (20.6) | $ (1.0) |
Excluding Fuel Purchases [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Accounts receivable - unconsolidated affiliates | $ 1.1 |  | $ 1.1 |  | $ 2.0

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