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Reconciliation of Adjusted EBITDA to Income (Loss) (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |
Adjusted EBITDA | $ 781 | $ 735 | $ 838
Non-vehicle depreciation and amortization | 256 | 259 | 253
Interest expense related to corporate debt, net | (188) | (188) | (203)
Early extinguishment of debt | 19 | 3 | 27
Restructuring Charges | 22 | 63 | 29
Transaction-related costs, net | 20 | 23 | 21
Non-operational charges related to shareholder activist activity | 9 | 0 | 0
Impairment | 0 | 2 | 0
Charges for legal matter | 0 | (14) | 26
Income before income taxes | 267 | 211 | 279
Acquisition-related Costs [Member] |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |
Non-vehicle depreciation and amortization | $ 61 | $ 58 | $ 59

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- Definition Adjusted earnings before non-vehicle related depreciation and amortization, any impairment charge, restructuring and other related charges, early extinguishment of debt costs, non-vehicle related interest, transaction-related costs, net charges for an unprecedented personal-injury legal matters, non-operational charges related to shareholder activist activity and income taxes. + References No definition available. + Details
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