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Business Disposition - Schedule of Consolidated Statements of Operations (Detail) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items] |  |  |  |
Total | $ 0.4 | $ (108.2) | $ 38.0 | $ (109.9)
Waste Management |  |  |  |
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items] |  |  |  |
Net sales |  | 20.5 | 4.6 | 42.0
Operating loss |  | (171.6) | (0.4) | (171.0)
Termination fee |  | 4.0 |  | 4.0
Other expense, net |  | (5.8) |  | (7.7)
Interest expense, net |  | (1.2) | (0.3) | (2.4)
Loss before taxes |  | (174.6) | (0.7) | (177.1)
Income tax benefit |  | (66.4) | (0.1) | (67.2)
Net loss |  | (108.2) | (0.6) | (109.9)
Pre-tax gain on disposal |  |  | 58.4 |
Income tax expense (benefit) | (0.4) |  | 19.8 |
After-tax gain on disposal | 0.4 |  | 38.6 |
Total | $ 0.4 | $ (108.2) | 38.0 | (109.9)
Net cash provided by operating activities |  |  | 2.3 | 8.8
Net cash used in investing activities |  |  | $ (0.1) | $ (2.6)

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