XML 35 R26.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Investment in Unconsolidated Affiliates (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2018
Reconciliation of Basis Difference [Line Items] |
Reconciliation of Basis Difference [Table Text Block] | The following table reconciles the basis difference in Enable from December 31, 2017 to June 30, 2018.
(In millions) |  |
Basis difference at December 31, 2017 |  | $ | 714.2 |
Change in Enable basis difference |  | (3.1 | )
Amortization of basis difference |  | (5.6 | )
Elimination of Enable fair value step up |  | (8.6 | )
Basis difference at June 30, 2018 |  | $ | 696.9 |
Reconciliation of Equity in Earnings of Unconsolidated Affiliates [Table Text Block] | The following table reconciles the Company's equity in earnings of unconsolidated affiliates for the three and six months ended June 30, 2018 and 2017.
| Three Months Ended | Six Months Ended
| June 30, | June 30,
(In millions) | 2018 | 2017 | 2018 | 2017
Enable net income | $ | 86.4 |  | $ | 86.2 |  | $ | 191.0 |  | $ | 197.4 |
OGE Energy's percent ownership at period end | 25.6 | % | 25.7 | % | 25.6 | % | 25.7 | %
OGE Energy's portion of Enable net income | 22.2 |  | 22.2 |  | 49.0 |  | 50.7 |
Amortization of basis difference | 2.8 |  | 2.9 |  | 5.6 |  | 5.7 |
Elimination of Enable fair value step up | 4.3 |  | 4.3 |  | 8.6 |  | 8.6 |
Equity in earnings of unconsolidated affiliates | $ | 29.3 |  | $ | 29.4 |  | $ | 63.2 |  | $ | 65.0 |
Schedule of Related Party Transactions [Table Text Block] | The following table summarizes related party transactions between OG&E and Enable during the three and six months ended June 30, 2018 and 2017.
| Three Months Ended | Six Months Ended
| June 30, | June 30,
(In millions) | 2018 | 2017 | 2018 | 2017
Operating revenues: |  |  |  |
Electricity to power electric compression assets | $ | 3.6 |  | $ | 3.3 |  | $ | 7.6 |  | $ | 5.5 |
Cost of sales: |  |  |  |
Natural gas transportation services | $ | 8.8 |  | $ | 8.8 |  | $ | 17.5 |  | $ | 17.5 |
Natural gas purchases (sales) | $ | 2.2 |  | $ | (0.4 | ) | $ | 2.5 |  | $ | (0.8 | )
Summarized Balance Sheet Financial Information, Equity Method Investment [Table Text Block] | Summarized unaudited financial information for 100 percent of Enable is presented below at June 30, 2018 and December 31, 2017 and for the three and six months ended June 30, 2018 and 2017.
| June 30, | December 31,
Balance Sheet | 2018 | 2017
(In millions) |
Current assets | $ | 432 |  | $ | 416 |
Non-current assets | $ | 11,360 |  | $ | 11,177 |
Current liabilities | $ | 1,258 |  | $ | 1,279 |
Non-current liabilities | $ | 2,963 |  | $ | 2,660 |
Summarized Income Statement Financial Information, Equity Method Investment [Table Text Block] |
| Three Months Ended | Six Months Ended
| June 30, | June 30,
Income Statement | 2018 | 2017 | 2018 | 2017
(In millions) |
Operating revenues | $ | 805 |  | $ | 626 |  | $ | 1,553 |  | $ | 1,292 |
Cost of natural gas and NGLs | $ | 444 |  | $ | 279 |  | $ | 819 |  | $ | 587 |
Operating income | $ | 126 |  | $ | 122 |  | $ | 265 |  | $ | 262 |
Net income | $ | 86 |  | $ | 86 |  | $ | 191 |  | $ | 197 |

X
- Definition [Line Items] for Reconciliation of Basis Difference [Table] + References No definition available. + Details
Name: | oge_ReconciliationofBasisDifferenceLineItems
Namespace Prefix: | oge_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition [Table Text Block] for Reconciliation of Basis Difference [Table] + References No definition available. + Details
Name: | oge_ReconciliationofBasisDifferenceTableTextBlock
Namespace Prefix: | oge_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition [Table Text Block] for Reconciliation of Equity in Earnings of Unconsolidated Affiliates [Table] + References No definition available. + Details
Name: | oge_ReconciliationofEquityinEarningsofUnconsolidatedAffiliatesTableTextBlock
Namespace Prefix: | oge_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Summarized Balance Sheet Financial Information, Equity Method Investment [Table Text Block] + References No definition available. + Details
Name: | oge_SummarizedBalanceSheetFinancialInformationEquityMethodInvestmentTableTextBlock
Namespace Prefix: | oge_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Summarized Income Statement Financial Information, Equity Method Investment [Table Text Block] + References No definition available. + Details
Name: | oge_SummarizedIncomeStatementFinancialInformationEquityMethodInvestmentTableTextBlock
Namespace Prefix: | oge_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of related party transactions. Examples of related party transactions include, but are not limited to, transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners and (d) affiliates. + References No definition available. + Details
Name: | us-gaap_ScheduleOfRelatedPartyTransactionsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration