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Business Segments (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Segment Reporting Information [Line Items] |  |  |  |
Sales | $ 770.3 | $ 1,080.4 | $ 1,725.8 | $ 2,085.2
Operating profit (loss) | 27.3 | 114.5 | 108.5 | 176.2
LIFO and net realizable value reserves | 0.0 | 0.0 | 0.0 | (0.1)
Corporate expenses | (7.7) | (18.0) | (20.5) | (34.6)
Closed operations and other income (expense) | 2.4 | (7.9) | (4.2) | (11.0)
Restructuring and other charges | (16.7) | 0.0 | (24.7) | 0.0
Impairment of goodwill | (287.0) | 0.0 | (287.0) | 0.0
Income (loss) from equity investments | (1.9) | (3.5) | (5.6) | (6.3)
Gain on asset sales, net | 0.0 | 21.6 | 2.5 | 21.6
Debt extinguishment charge | (21.5) | 0.0 | (21.5) | 0.0
Interest expense, net | (21.7) | (25.9) | (43.6) | (50.7)
(Loss) income before income taxes | (327.3) | 84.3 | (292.9) | 101.4
Allegheny & Tsingshan Stainless | Employee Severance [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Income (loss) from equity investments | (2.4) | 0.0 | (2.4) | 0.0
Advanced Alloys & Solutions [Member] | Allegheny & Tsingshan Stainless |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Income (loss) from equity investments | (4.6) | (4.0) | (8.5) | (7.3)
Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales | 822.9 | 1,165.6 | 1,859.0 | 2,254.1
Operating Segments | High Performance Materials & Components |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales | 316.7 | 552.8 | 765.2 | 1,069.1
Operating profit (loss) | 9.2 | 78.4 | 66.3 | 130.1
Operating Segments | Advanced Alloys & Solutions [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales | 506.2 | 612.8 | 1,093.8 | 1,185.0
Operating profit (loss) | 18.1 | 36.1 | 42.2 | 46.1
Internal Customers | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales | 52.6 | 85.2 | 133.2 | 168.9
Internal Customers | Operating Segments | High Performance Materials & Components |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales | 16.0 | 19.7 | 44.2 | 39.4
Internal Customers | Operating Segments | Advanced Alloys & Solutions [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales | 36.6 | 65.5 | 89.0 | 129.5
External Customers | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales | 770.3 | 1,080.4 | 1,725.8 | 2,085.2
External Customers | Operating Segments | High Performance Materials & Components |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales | 300.7 | 533.1 | 721.0 | 1,029.7
External Customers | Operating Segments | Advanced Alloys & Solutions [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales | $ 469.6 | $ 547.3 | $ 1,004.8 | $ 1,055.5

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