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v3.22.4

Business Segments - Narrative (Details) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) position
Segment Reporting Information [Line Items] |  |  |
Gain (loss) on asset sales and sale of business, net | $ (134.2) | $ 13.8 | $ 2.5
Restructuring and Related Cost, Expected Number of Positions Eliminated | position |  |  | 1,400
Restructuring and other credits (charges) | (23.7) | 10.5 | $ (1,132.1)
Income (loss) from equity method investments | 12.6 | 0.1 | (7.0)
Total international sales | 1,617.4 | 1,264.9 | 1,173.0
Sales by U.S. operations to foreign countries | 1,217.9 | 846.3 | 812.3
Inventory valuation reserves | 70.9 | 65.4 |
Closed operations and other expenses | (12.1) | (4.8) | (7.4)
Net gain (loss) on sale of businesses | (134.2) | 0.0 | 0.0
Income From Government Assistance, CARES Act | 34.0 |  |
Sheffield, UK Operations |  |  |
Segment Reporting Information [Line Items] |  |  |
Net gain (loss) on sale of businesses | (141.0) |  |
Pico Rivera, CA Operations |  |  |
Segment Reporting Information [Line Items] |  |  |
Gain (Loss) on disposition of other assets | 6.8 |  |
High Performance Materials & Components |  |  |
Segment Reporting Information [Line Items] |  |  |
Employee Retention Credits, Aviation Manufacturing Jobs Protection Program | 27.0 |  |
Advanced Alloys & Solutions [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Employee retention credits | $ 7.0 |  |
Allegheny & Tsingshan Stainless |  |  |
Segment Reporting Information [Line Items] |  |  |
Equity method investment ownership percentage | 50.00% |  |
Revenue from related parties | $ 0.0 | 0.0 | 18.4
Income (loss) from equity method investments | 9.1 | (0.9) | (10.6)
Allegheny & Tsingshan Stainless | Advanced Alloys & Solutions [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Income (loss) from equity method investments | $ 8.2 | (0.9) | (8.2)
Uniti [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Equity method investment ownership percentage | 50.00% |  |
Revenue from related parties | $ 45.0 | 45.8 | 36.7
Uniti [Member] | Advanced Alloys & Solutions [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Income (loss) from equity method investments | $ 4.4 | $ 1.0 | $ 1.2
Aerospace & Defense Market Concentration Risk [Member] | Revenue Benchmark [Member] | High Performance Materials & Components |  |  |
Segment Reporting Information [Line Items] |  |  |
Percentage of sales | 80.00% |  |
Energy and Aerospace & Defense Market Concentration [Member] | Revenue Benchmark [Member] | Advanced Alloys & Solutions [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Percentage of sales | 50.00% |  |
Commercial Jet Engines Concentration | Revenue Benchmark [Member] | High Performance Materials & Components |  |  |
Segment Reporting Information [Line Items] |  |  |
Percentage of sales | 60.00% |  |
Allegheny Technologies Inc | STAL Precision Stainless Steel Company Limited [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Joint venture ownership percentage | 60.00% |  |

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