Segment Information The Companys chief operating decision-maker assesses performance and allocates resources based upon the separate financial information from each of the Companys operating segments. In identifying its reportable segments, the Company considered the nature of services provided, the geographical areas in which the segments operated and other relevant factors. The Company aggregates certain of its operating segments into its reportable segments. Management evaluates the operating results of each of its reportable segments based upon revenues and Adjusted EBITDA, which the Company defines as income from continuing operations before non-vehicle related depreciation and amortization, any impairment charges, restructuring and other related charges, early extinguishment of debt costs, non-vehicle related interest, transaction-related costs, net charges for unprecedented personal-injury legal matters, non-operational charges related to shareholder activist activity and income taxes. Net charges for unprecedented personal-injury legal matters are recorded within operating expenses in the Companys Consolidated Condensed Statement of Comprehensive Income. The Company has revised its definition of Adjusted EBITDA to exclude non-operational charges related to shareholder activist activity. Non-operational charges related to shareholder activist activity include third party advisory, legal and other professional service fees and are recorded within selling, general and administrative expenses in the Companys Consolidated Condensed Statement of Comprehensive Income. The Company did not revise prior years Adjusted EBITDA amounts because there were no costs similar in nature to these costs. The Companys presentation of Adjusted EBITDA may not be comparable to similarly-titled measures used by other companies. Three Months Ended September 30, 2018 2017 Revenues Adjusted EBITDA Revenues Adjusted EBITDA Americas $ 1,844 $ 313 $ 1,839 $ 303 International 934 178 913 194 Corporate and Other (a)  (15 )  (15 ) Total Company $ 2,778 $ 476 $ 2,752 $ 482 Reconciliation of Adjusted EBITDA to income before income taxes 2018 2017 Adjusted EBITDA $ 476 $ 482 Less: Non-vehicle related depreciation and amortization 62 66 Interest expense related to corporate debt, net 44 45 Transaction-related costs, net 11  Restructuring and other related charges 4 7 Income before income taxes $ 355 $ 364 __________ (a) Includes unallocated corporate overhead which is not attributable to a particular segment. Nine Months Ended September 30, 2018 2017 Revenues Adjusted EBITDA Revenues Adjusted EBITDA Americas $ 4,782 $ 435 $ 4,718 $ 379 International 2,292 252 2,111 260 Corporate and Other (a)  (48 )  (44 ) Total Company $ 7,074 $ 639 $ 6,829 $ 595 Reconciliation of Adjusted EBITDA to income before income taxes 2018 2017 Adjusted EBITDA $ 639 $ 595 Less: Non-vehicle related depreciation and amortization 190 194 Interest expense related to corporate debt, net: Interest expense 139 142 Early extinguishment of debt 5 3 Transaction-related costs, net 18 8 Restructuring and other related charges 14 52 Non-operational charges related to shareholder activist activity 9  Charges for legal matter, net  (14 ) Income before income taxes $ 264 $ 210 __________ (a) Includes unallocated corporate overhead which is not attributable to a particular segment. Since December 31, 2017 , there have been no significant changes in segment assets exclusive of assets under vehicle programs. As of September 30, 2018 and December 31, 2017, Americas assets under vehicle programs were approximately $9.9 billion and $9.0 billion , respectively, due to seasonality. As of September 30, 2018 and December 31, 2017, International assets under vehicle programs were approximately $3.7 billion and $2.9 billion , respectively, due to seasonality.