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Investment in Unconsolidated Affiliates | 9 Months Ended
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Sep. 30, 2015
Related Party Transactions [Abstract] |
Equity Method Investments and Joint Ventures Disclosure [Text Block] | Investment in Unconsolidated Affiliate and Related Party Transactions On March 14, 2013, OGE Energy entered into a Master Formation Agreement with the ArcLight group and CenterPoint Energy, Inc., pursuant to which OGE Energy, the ArcLight Group and CenterPoint Energy, Inc., agreed to form Enable to own and operate the midstream businesses of OGE Energy and CenterPoint that was initially structured as a private limited partnership. This transaction closed on May 1, 2013. Pursuant to the Master Formation Agreement, OGE Energy and the ArcLight group indirectly contributed 100 percent of the equity interests in Enogex LLC to Enable. The Company determined that its contribution of Enogex LLC to Enable met the requirements of being in substance real estate and was recorded at historical cost. On April 16, 2014, Enable completed an initial public offering of 25,000,000 common units resulting in Enable becoming a publicly traded Master Limited Partnership. In connection with Enable’s initial public offering, approximately 61.4 percent of OGE Holdings and CenterPoint’s common units were converted into subordinated units. As a result, following the initial public offering, OGE Holdings owned 42,832,291 common units and 68,150,514 subordinated units of Enable. Holders of subordinated units are not entitled to receive any distribution of available cash until the common units have received the minimum quarterly distribution plus any arrearages in the payment of the minimum quarterly distribution from prior quarters. The subordinated units will convert into common units when Enable has paid at least the minimum quarterly distribution for three years or paid at least 150 percent of the minimum quarterly distribution for one year. On July 22, 2015, Enable announced a quarterly dividend distribution of $0.31600 per unit on its outstanding common and subordinated units, representing an increase of approximately 1.1 percent over the prior quarter distribution. Enable's gross margins are affected by commodity price movements. Based on forward commodity prices, Enable expects to see a decrease in producer activity that will affect its future distribution growth rate. If cash distributions to Enable’s unitholders exceed $0.330625 per unit in any quarter, the general partner will receive increasing percentages, up to 50 percent, of the cash Enable distributes in excess of that amount. OGE Holdings is entitled to 60 percent of those “incentive distributions.” In certain circumstances, the general partner will have the right to reset the minimum quarterly distribution and the target distribution levels at which the incentive distributions receive increasing percentages to higher levels based on Enable’s cash distributions at the time of the exercise of this reset election. On October 22, 2015, Enable announced a quarterly dividend distribution of $0.31800 per unit on its outstanding common and subordinated units, representing an increase of approximately 0.6 percent over the prior quarter distribution. Distributions received from Enable were $35.1 million and $33.6 million for the three months ended September 30, 2015 and 2014, respectively, and $104.0 million and $110.1 million for the nine months ended September 30, 2015 and 2014, respectively. At September 30, 2015, OGE Energy held 26.3 percent of the limited partner interests in Enable. Related Party Transactions Operating costs charged and related party transactions between the Company and its affiliate, Enable, are discussed below. Prior to May 1, 2013, operating costs charged and related party transactions between the Company and Enogex Holdings were eliminated in consolidation. OGE Energy's interest in Enogex Holdings was deconsolidated on May 1, 2013. On May 1, 2013, OGE Energy and Enable entered into a Services Agreement, Employee Transition Agreement, and other agreements whereby OGE Energy agreed to provide certain support services to Enable such as accounting, legal, risk management and treasury functions for an initial term ending on April 30, 2016. The support services automatically extend year-to-year at the end of the initial term, unless terminated by Enable with at least 90 days’ notice. Enable may terminate the initial support services at any time with 180 days' notice if approved by the board of Enable's general partner. Under these agreements, OGE Energy charged operating costs to Enable of $2.6 million and $3.3 million (which results in a corresponding reduction to OGE Energy's operations and maintenance expense) for the three months ended September 30, 2015 and 2014, respectively, and $7.9 million and $13.1 million for the nine months ended September 30, 2015 and 2014, respectively. OGE Energy charges operating costs to OG&E and Enable based on several factors. Operating costs directly related to OG&E and/or Enable are assigned as such. Operating costs incurred for the benefit of OG&E and Enable are allocated either as overhead based primarily on labor costs or using the "Distrigas" method. Additionally, OGE Energy agreed to provide seconded employees to Enable to support its operations for an initial term ending on December 31, 2014. In October 2014, CenterPoint, OGE Energy and Enable agreed to continue the secondment to Enable of 192 OGE Energy employees that participate in OGE Energy's defined benefit and retirement plans beyond December 31, 2014. OGE Energy billed Enable for reimbursement of $7.0 million and $25.0 million during the three months ended September 30, 2015 and September 30, 2014, respectively, and $25.1 million and $78.0 million during the nine months ended September 30, 2015 and September 30, 2014, respectively, under the Transitional Seconding Agreement for employment costs. OGE Energy had accounts receivable from Enable of $5.1 million and $5.6 million as of September 30, 2015 and December 31, 2014, respectively, for amounts billed for transitional services, including the cost of seconded employees. Related Party Transactions with Enable OG&E entered into a new contract with Enable to provide transportation services effective May 1, 2014 which eliminated the natural gas storage services. This transportation agreement grants Enable the responsibility of delivering natural gas to OG&E’s generating facilities and performing an imbalance service. With this imbalance service, in accordance with the cash-out provision of the contract, OG&E purchases gas from Enable when Enable’s deliveries exceed OG&E’s pipeline receipts. Enable purchases gas from OG&E when OG&E’s pipeline receipts exceed Enable’s deliveries. The following table summarizes related party transactions between OG&E and its affiliate, Enable, during the three and nine months ended September 30, 2015 and 2014.
| Three Months Ended | Nine Months Ended
| September 30, | September 30,
(In millions) | 2015 | 2014 | 2015 | 2014
Operating Revenues: |  |  |  |
Electricity to power electric compression assets | $ | 4.4 |  | $ | 4.1 |  | $ | 11.1 |  | $ | 10.1 |
Cost of Sales: |  |  |  |
Natural gas transportation services | $ | 8.8 |  | $ | 8.8 |  | $ | 26.3 |  | $ | 26.2 |
Natural gas storage services | — |  | 0.1 |  | — |  | 4.5 |
Natural gas purchases | 2.5 |  | 3.4 |  | 7.1 |  | 6.9 |
Summarized Financial Information of Enable Summarized unaudited financial information for 100 percent of Enable is presented below at September 30, 2015 and December 31, 2014 and for the three and nine months ended September 30, 2015 and 2014.
Balance Sheet | September 30, 2015 | December 31, 2014
| (In millions)
Current assets | $ | 427 |  | $ | 438 |
Non-current assets | 10,774 |  | 11,399 |
Current liabilities | 804 |  | 671 |
Non-current liabilities | 2,786 |  | 2,344 |
| Three Months Ended | Nine Months Ended
| September 30, | September 30,
Income Statement | 2015 | 2014 | 2015 | 2014
| (In millions)
Operating revenues | $ | 646 |  | $ | 803 |  | $ | 1,852 |  | $ | 2,632 |
Cost of sales | 287 |  | 439 |  | 856 |  | 1,550 |
Operating income | (975 | ) | 152 |  | (778 | ) | 452 |
Net income | (985 | ) | 139 |  | (817 | ) | 408 |
The formation of Enable was considered a business combination, and CenterPoint Midstream was the acquirer of Enogex Holdings for accounting purposes. Under this method, the fair value of the consideration paid by CenterPoint Midstream for Enogex Holdings is allocated to the assets acquired and liabilities assumed on May 1, 2013 based on their fair value. Enogex Holdings' assets, liabilities and equity have accordingly been adjusted to estimated fair value as of May 1, 2013, resulting in an increase to equity of $2.2 billion. Due to the contribution of Enogex LLC to Enable, meeting the requirements of being in substance real estate and thus recording the initial investment at historical cost, the effects of the amortization and depreciation expense associated with the fair value adjustments on Enable's results of operations have been eliminated in the Company's recording of its equity in earnings of Enable. OGE Energy recorded a loss in equity in earnings of unconsolidated affiliates of $71.9 million and $12.0 million for the three and nine months ended September 30, 2015 and an increase in equity in earnings of unconsolidated affiliates of $44.7 million and $131.9 million for the three and nine months ended September 30, 2014. Equity in earnings of unconsolidated affiliates includes OGE Energy's share of Enable's earnings adjusted for the amortization of the basis difference of OGE Energy's original investment in Enogex and its underlying equity in net assets of Enable. The basis difference is the result of the initial contribution of Enogex to Enable in May 2013, and subsequent issuances of equity by Enable, including the IPO in April 2014 and the issuance of common units for the acquisition of CenterPoint's 24.95 percent interest in SESH. The basis difference is being amortized over approximately 30 years, the average life of the assets to which the basis difference is attributed. Equity in earnings of unconsolidated affiliates is also adjusted for the elimination of the Enogex Holdings fair value adjustments, as described above. The difference between the Company's investment in Enable and its underlying equity in the net assets of Enable was $0.8 billion as of September 30, 2015. The following table reconciles OGE Energy's equity in earnings of its unconsolidated affiliates for the three and nine months ended September 30, 2015 and 2014.
| Three Months Ended | Nine Months Ended
| September 30, | September 30,
Reconciliation of Equity in Earnings of Unconsolidated Affiliates | 2015 | 2014 | 2015 | 2014
(In millions) |  |
OGE's share of Enable Net Income (Loss) | $ | (80.3 | ) | $ | 36.4 |  | $ | (35.9 | ) | $ | 111.1 |
Amortization of basis difference | 3.5 |  | 3.4 |  | 10.6 |  | 10.4 |
Elimination of Enogex Holdings fair value and other adjustments | 4.9 |  | 4.9 |  | 13.3 |  | 10.4 |
OGE's Equity in earnings of unconsolidated affiliates | $ | (71.9 | ) | $ | 44.7 |  | $ | (12.0 | ) | $ | 131.9 |
Enable tests its goodwill for impairment annually on October 1, or more frequently if events or changes in circumstances indicate that the carrying value of goodwill may not be recoverable. Goodwill is assessed for impairment by comparing the fair value of the reporting unit with its book value, including goodwill. Subsequent to the completion of the October 1, 2014 annual test and previous interim assessment as of December 31, 2014, the crude oil and natural gas industry was impacted by further commodity price declines, which consequently resulted in decreased producer activity in certain regions in which Enable operates. Based on the decline in producer activity and the forecasted impact on future periods, in addition to an increase in the weighted average cost of capital, Enable determined that the impact on its forecasted operating profits and cash flows for its gathering and processing and transportation and storage segments for the next five years would be significantly reduced. As a result, when Enable performed the first step of its annual goodwill impairment analysis as of October 1, 2015, it determined that the carrying value of the gathering and processing and transportation and storage segments exceeded fair value. Enable completed the second step of the goodwill impairment analysis comparing the implied fair value for those reporting units to the carrying amount of that goodwill and determined that goodwill for those units was completely impaired in the amount of $1,086.4 million as of September 30, 2015. Accordingly, the Company recorded a $108.4 million pre-tax charge in the three and nine months ended September 30, 2015 for its share of the goodwill impairment, as adjusted for the basis differences.

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- Definition The entire disclosure for equity method investments and joint ventures. Equity method investments are investments that give the investor the ability to exercise significant influence over the operating and financial policies of an investee. Joint ventures are entities owned and operated by a small group of businesses as a separate and specific business or project for the mutual benefit of the members of the group. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 35 -Paragraph 35 -URI http://asc.fasb.org/extlink&oid=49116238&loc=d3e32847-111569 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 35 -Paragraph 32 -URI http://asc.fasb.org/extlink&oid=49116238&loc=d3e32787-111569 + Details
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