Description of Business DPL is a diversified regional energy company organized in 1985 under the laws of Ohio. DPL has one reportable segment: the Utility segment. See Note 12  Business Segments for more information relating to this reportable segment. The terms we, us, our and ours are used to refer to DPL and its subsidiaries. DPL is an indirectly wholly-owned subsidiary of AES. DP&amp;L , a wholly-owned subsidiary of DPL , is a public utility incorporated in 1911 under the laws of Ohio. Beginning in 2001, Ohio law gave Ohio consumers the right to choose the electric generation supplier from whom they purchase retail generation service; however, retail transmission and distribution services are still regulated. DP&amp;L has the exclusive right to provide such transmission and distribution services to approximately 524,000 customers located in West Central Ohio. Additionally, DP&amp;L provides retail SSO electric service to residential, commercial, industrial and governmental customers in a 6,000 - square mile area of West Central Ohio. Through September 30, 2017, DP&amp;L owned undivided interests in multiple coal-fired and peaking electric generating facilities as well as numerous transmission facilities. On October 1, 2017, the DP&amp;L -owned generating facilities were transferred to AES Ohio Generation, an affiliate of DP&amp;L and wholly-owned subsidiary of DPL , through an asset contribution agreement to a subsidiary that was merged into AES Ohio Generation. Principal industries located in DP&amp;Ls service territory include automotive, food processing, paper, plastic, health care, data management, manufacturing and defense. DP&amp;L's distribution sales reflect the general economic conditions, seasonal weather patterns, the proliferation of energy efficiency and distributed renewable resources and the market price of electricity. Through September 30, 2017, DP&amp;L sold its generated energy and capacity into the wholesale market. After September 30, 2017, DP&amp;L continues to sell its proportional share of energy and capacity from its investment in OVEC. DPLs other significant subsidiaries include MVIC and AES Ohio Generation. MVIC is our captive insurance company that provides insurance services to DPL and our other subsidiaries. AES Ohio Generation owns an undivided interest in Conesville. AES Ohio Generation sells all of its energy and capacity into the wholesale market. DPL's subsidiaries are all wholly-owned. DPL also has a wholly-owned business trust, DPL Capital Trust II, formed for the purpose of issuing trust capital securities to investors. DP&amp;Ls electric transmission and distribution businesses are subject to rate regulation by federal and state regulators. Accordingly, DP&amp;L applies the accounting standards for regulated operations to its electric transmission and distribution businesses and records regulatory assets when incurred costs are expected to be recovered in future customer rates, and regulatory liabilities when current cost recoveries in customer rates relate to expected future costs. DPL and its subsidiaries employed 674 people as of September 30, 2018 , of which 648 were employed by DP&amp;L. Approximately 53% of all DPL employees are under a collective bargaining agreement, which expires October 31, 2020 .