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Segments - Schedule of Reconciliation of the Company's Segment Operating Income (Loss) (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total operating income (loss) | $ (62.0) | $ 16.9 | $ 24.1 | $ 1.7 | $ 8.5 | $ 9.8 | $ 11.9 | $ (21.8) | $ (19.3) | $ 8.4 | $ (143.0)
Asset impairment expense |  |  |  |  |  |  |  |  | 82.6 | 0.1 | 96.9
Restructuring expense |  |  |  |  |  |  |  |  | 12.9 | 27.2 | 23.4
Segment Operating Income (Loss) |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total operating income (loss) |  |  |  |  |  |  |  |  | 22.1 | 45.0 | (27.9)
Corporate |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total operating income (loss) |  |  |  |  |  |  |  |  | (37.5) | (33.0) | (35.8)
Reconciliation of Company’s Segment Operating Income (Loss) |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total operating income (loss) |  |  |  |  |  |  |  |  | (19.3) | 8.4 | (143.0)
Asset impairment expense |  |  |  |  |  |  |  |  |  |  | (77.3)
Restructuring expense |  |  |  |  |  |  |  |  | $ (3.9) | $ (3.6) | $ (2.0)

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