Note 16. Business Segment Reporting Our business is conducted through two reportable segments: Terminix and ServiceMaster Brands. In accordance with accounting standards for segments, our reportable segments are strategic business units that offer different services. The Terminix segment provides termite and pest control services to residential and commercial customers and distributes pest control products primarily under the Terminix, Terminix Commercial and Copesan brand names. The ServiceMaster Brands segment provides residential and commercial disaster restoration and commercial cleaning services through franchises primarily under the ServiceMaster, ServiceMaster Restore and ServiceMaster Clean brand names, home cleaning services through franchises primarily under the Merry Maids brand name, cabinet and furniture repair primarily under the Furniture Medic brand name and home inspection services primarily under the AmeriSpec brand name. Corporate includes our financing subsidiary exclusively dedicated to providing financing to our franchisees and retail customers of our operating units, and our headquarters operations (substantially all of which costs are allocated to our reportable segments), which provide various technology, marketing, finance, legal and other support services to the reportable segments. The composition of our reportable segments is consistent with that used by our chief operating decision maker (the CODM) to evaluate performance and allocate resources. Information regarding the accounting policies used by us are described in our 2018 Form 10-K. We derive substantially all of our revenue from customers and franchisees in the United States with approximately three percent generated in foreign markets. Operating expenses of the business units consist primarily of direct costs and indirect costs allocated from Corporate. We use Reportable Segment Adjusted EBITDA as our measure of segment profitability. Accordingly, the CODM evaluates performance and allocates resources based primarily on Reportable Segment Adjusted EBITDA. Reportable Segment Adjusted EBITDA is defined as net income before: unallocated corporate expenses; gain from discontinued operations, net of income taxes; provision for income taxes; interest expense; depreciation and amortization expense; acquisition-related costs; fumigation related matters; non-cash stock-based compensation expense; restructuring charges; loss on extinguishment of debt; and realized (gain) on investment in frontdoor, inc. Our definition of Reportable Segment Adjusted EBITDA may not be calculated or comparable to similarly titled measures of other companies. We believe Reportable Segment Adjusted EBITDA is useful for investors, analysts and other interested parties as it facilitates company-to-company operating performance comparisons by excluding potential differences caused by variations in capital structures, taxation, the age and book depreciation of facilities and equipment, restructuring initiatives and equity-based, long-term incentive plans. Information for continuing operations for each reportable segment and Corporate is presented below: ? ? ? ? Three Months Ended ? March 31, ? (In millions) 2019 2018 ? Revenue: ? Terminix $ 419 $ 368 ? ServiceMaster Brands 62 60 ? Reportable Segment Revenue $ 481 $ 427 ? Corporate   ? Total Revenue $ 482 $ 428 ? Reportable Segment Adjusted EBITDA: (1) ? Terminix $ 83 $ 86 ? ServiceMaster Brands 23 23 ? Reportable Segment Adjusted EBITDA $ 106 $ 109 ___________________________________ (1) Presented below is a reconciliation of Net Income to Reportable Segment Adjusted EBITDA: ? ? ? ? Three Months Ended ? March 31, ? (In millions) 2019 2018 ? Net Income $ 70 $ 40 ? Unallocated corporate expenses (3)  ? Costs historically allocated to American Home Shield  11 ? Depreciation and amortization expense 24 21 ? Acquisition-related costs 1  ? Fumigation related matters 1  ? Non-cash stock-based compensation expense 4 4 ? Restructuring charges 7 12 ? Realized (gain) on investment in frontdoor, inc. (40)  ? Gain from discontinued operations, net of income taxes  (23) ? Provision for income taxes 9 6 ? Loss on extinguishment of debt 6  ? Interest expense 27 37 ? Reportable Segment Adjusted EBITDA $ 106 $ 109 ? ?