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v3.21.1

Related Party Transactions (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Dec. 31, 2020
Related Party Transaction [Line Items] |  |  |
Distribution Made to Limited Partner, Distributions Declared, Per Unit | $ 0.16525 |  |
Expected Settlement Charge | $ 18.3 |  |
Enable Midstream Partners [Member] | OG&E [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Revenue from Related Parties | 2.6 | $ 3.7 |
OG&E [Member] | OGE Energy [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party | 35.8 | 37.9 |
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 |
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 | 5.3 | 6.4 |
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 | 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) | $ 0.7 |
Excluding Fuel Purchases [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Accounts receivable - unconsolidated affiliates | $ 3.6 |  | $ 2.0

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