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v3.19.1

Segment Reporting - Segment Revenue and Segment Profit (Loss) (Details) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2019 USD ($) primaryreportablesegment | Mar. 31, 2018 USD ($)
Segment Reporting Information [Line Items] |  |
Revenues | $ 1,158 | $ 1,420
Revenue | $ 1,158 | 1,420
Primary reportable segments | primaryreportablesegment | 3 |
Depreciation and Amortization, excluding Amortization of Acquired Intangible Assets | $ 54 | 56
Segment Pre-tax Income (Loss) | 69 | 105
Segment Adjusted EBITDA | 123 | 161
Commercial Industries |  |
Segment Reporting Information [Line Items] |  |
Revenues | 612 | 654
Revenue | 612 | 654
Depreciation and Amortization, excluding Amortization of Acquired Intangible Assets | 22 | 28
Segment Pre-tax Income (Loss) | 113 | 110
Segment Adjusted EBITDA | 135 | 138
Government services |  |
Segment Reporting Information [Line Items] |  |
Revenues | 325 | 335
Revenue | 325 | 335
Depreciation and Amortization, excluding Amortization of Acquired Intangible Assets | 9 | 7
Segment Pre-tax Income (Loss) | 86 | 108
Segment Adjusted EBITDA | 95 | 115
Transportation Services |  |
Segment Reporting Information [Line Items] |  |
Revenues | 184 | 176
Revenue | 184 | 176
Depreciation and Amortization, excluding Amortization of Acquired Intangible Assets | 9 | 8
Segment Pre-tax Income (Loss) | 20 | 27
Segment Adjusted EBITDA | 29 | 35
Other |  |
Segment Reporting Information [Line Items] |  |
Revenue | 37 | 255
Corporate, Non-Segment [Member] |  |
Segment Reporting Information [Line Items] |  |
Revenues | 0 | 0
Depreciation and Amortization, excluding Amortization of Acquired Intangible Assets | 14 | 10
Segment Pre-tax Income (Loss) | (151) | (176)
Segment Adjusted EBITDA | (137) | (166)
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Other |  |
Segment Reporting Information [Line Items] |  |
Revenue | 36 | 248
Depreciation and Amortization, excluding Amortization of Acquired Intangible Assets | 0 | 2
Segment Pre-tax Income (Loss) | 1 | 39
Segment Adjusted EBITDA | 1 | 41
Education | Other |  |
Segment Reporting Information [Line Items] |  |
Revenue | 1 | 7
Depreciation and Amortization, excluding Amortization of Acquired Intangible Assets | 0 | 1
Segment Pre-tax Income (Loss) | 0 | (3)
Segment Adjusted EBITDA | $ 0 | $ (2)

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