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Segment Reporting - Reconciliation Of Operating Profit (Loss) (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Reconciling items: |  |  |  |
Total Segment Profit (Loss) |  | $ 422,000,000 | $ 417,000,000 | $ 196,000,000
Goodwill, Impairment Loss | $ 0 | 0 | 0 | 935,000,000
Restructuring and related costs |  | 81,000,000 | 101,000,000 | 101,000,000
Interest expense |  | 112,000,000 | 137,000,000 | 40,000,000
Depreciation and amortization |  | 242,000,000 | 243,000,000 | 280,000,000
Litigation costs (recoveries), net |  | 227,000,000 | (11,000,000) | 40,000,000
Separation costs |  | 0 | 12,000,000 | 44,000,000
Gain (Loss) on Extinguishment of Debt |  | (108,000,000) | 0 | 0
Other Operating Income (Expense), Net |  | (5,000,000) | 7,000,000 | 22,000,000
Segment Pre-Tax Income (Loss) |  | (395,000,000) | (16,000,000) | (1,227,000,000)
Business transformation costs |  | 0 | 0 | 3,000,000
Depreciation and Amortization, excluding Amortization of Acquired Intangible Assets |  | 221,000,000 | 254,000,000 | 333,000,000
NY MMIS Depreciation |  | 0 | 0 | (52,000,000)
NY MMIS |  | (2,000,000) | 9,000,000 | 161,000,000
HE charge |  | (1,000,000) | (8,000,000) | 0
(Gain) loss on divestitures and transaction costs |  | (42,000,000) | 42,000,000 | (2,000,000)
Segment Adjusted EBITDA |  | $ 640,000,000 | $ 672,000,000 | $ 635,000,000

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- Definition One-time/non-recurring incremental direct costs related to the separation of businesses or a strategic cost project. These costs should not be part of the entity's on-going cost base, of the resulting businesses, after their separation. + References No definition available. + Details
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