14. SEGMENT INFORMATION The Companys business is organized into three reportable segments based on the nature of the products and services offered: (i) Space Systems; (ii) Imagery; and (iii) Services. The Space Systems reportable segment supplies space-based and ground-based infrastructure and information solutions including communication and imaging satellites, satellite payloads and antenna subsystems, space-based and airborne surveillance solutions, robotic systems and associated ground infrastructure and support services. The Imagery segment is a supplier of high resolution Earth imagery and radar data sourced from the Companys owned satellite constellations and third-party providers. The Services segment combines imagery, analytic expertise and innovative technology to deliver integrated intelligence solutions to customers. Transactions between segments are generally negotiated and accounted for under terms and conditions similar to other government and commercial contracts. The reconciling item corporate and other expenses includes items such as corporate office costs, regulatory costs, executive and director compensation, foreign exchange gains and losses, and fees for audit, legal and consulting services. The Companys Chief Operating Decision Maker (CODM) measures the performance of each segment based on revenue and Adjusted EBITDA. Adjusted EBITDA is defined as earnings before interest, tax, depreciation and amortization (EBITDA) adjusted for certain items affecting comparability as specified in the calculation. Certain items affecting comparability include restructuring, impairments, satellite insurance recovery, CEO severance and transaction and integration related expense. Transaction and integration related expense includes costs associated with de-leveraging activities, acquisitions and dispositions and the integration of acquisitions. Other unallocated expenses include retention costs and foreign exchange gains and losses which are not included in segment Adjusted EBITDA. The following table summarizes the operating performance of the Companys segments: ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? Three Months Ended September 30, ? ? Nine Months Ended September 30, ? 2019 2018 ? 2019 2018 Revenues: ? ? ? ? ? Space Systems $ 220 ? $ 263 ? ? $ 751 ? $ 886 Imagery 220 ? 210 ? ? 621 ? 633 Services ? 73 ? ? 62 ? ? ? 215 ? ? 198 Intersegment eliminations ? (34) ? ? (26) ? ? ? (114) ? ? (72) Total revenues $ 479 ? $ 509 ? ? $ 1,473 ? $ 1,645 ? ? ? ? ? ? ? ? ? ? ? ? ? ? Adjusted EBITDA: ? ? ? ? ? ? ? ? ? ? ? ? Space Systems $ 11 ? $ (7) ? ? $ 49 ? $ 34 Imagery ? 140 ? ? 129 ? ? ? 384 ? ? 396 Services ? 9 ? ? 9 ? ? ? 22 ? ? 19 Intersegment eliminations ? (13) ? ? (7) ? ? ? (26) ? ? (16) Depreciation and amortization ? (96) ? ? (119) ? ? ? (293) ? ? (343) Corporate and other expenses ? (19) ? ? (19) ? ? ? (55) ? ? (44) Restructuring ? 1 ? ? (2) ? ? ? (21) ? ? (15) Transaction and integration related expense ? (7) ? ? (14) ? ? ? (13) ? ? (24) Impairment losses, including inventory ?  ? ? (213) ? ? ? (15) ? ? (213) Satellite insurance recovery ?  ? ?  ? ? ? 183 ? ?  CEO severance ?  ? ?  ? ? ? (3) ? ?  Interest expense, net ? (50) ? ? (52) ? ? ? (148) ? ? (155) Interest income ? 1 ? ?  ? ? ? 1 ? ?  Equity loss (income) from joint ventures, net of tax ? 1 ? ? 1 ? ? ? 4 ? ? (2) Income (loss) before taxes $ (22) ? $ (294) ? ? $ 69 ? $ (363) ? The Companys capital expenditures are as follows: ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? Three Months Ended September 30, 2019 ? ? Space Systems ? Imagery ? Services Corporate and eliminations ? Total Capital expenditures: ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? Property, plant and equipment ? $ 7 ? $ 51 ? $  ? $ 8 ? $ 66 Intangible assets ? 1 ? 14 ? 1 ? (1) ? 15 ? ? $ 8 ? $ 65 ? $ 1 ? $ 7 ? $ 81 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? Three Months Ended September 30, 2018 ? ? Space Systems ? Imagery ? Services Corporate and eliminations ? Total Capital expenditures: ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? Property, plant and equipment ? $  ? $ 39 ? $  ? $ (11) ? $ 28 Intangible assets ? 5 ? 7 ?  ? (7) ? 5 ? ? $ 5 ? $ 46 ? $  ? $ (18) ? $ 33 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? Nine Months Ended September 30, 2019 ? ? Space Systems ? Imagery ? Services Corporate and eliminations ? Total Capital expenditures: ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? Property, plant and equipment ? $ 14 ? $ 152 ? $  ? $ (3) ? $ 163 Intangible assets ? 2 ? 41 ? 1 ? (1) ? 43 ? ? $ 16 ? $ 193 ? $ 1 ? $ (4) ? $ 206 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? Nine Months Ended September 30, 2018 ? ? Space Systems ? Imagery ? Services Corporate and eliminations ? Total Capital expenditures: ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? Property, plant and equipment ? $ 9 ? $ 118 ? $ 1 ? $ (17) ? $ 111 Intangible assets ? 9 ? 39 ? 2 ? (8) ? 42 ? ? $ 18 ? $ 157 ? $ 3 ? $ (25) ? $ 153 ? Substantially all of the Companys long-lived tangible assets were in the United States as of September 30, 2019 and December 31, 2018.