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BUSINESS SEGMENT INFORMATION - Reportable Segment Information by Geographic Area (Details) - USD ($) $ in Millions | 2 Months Ended | 3 Months Ended | 10 Months Ended | 11 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Sep. 30, 2025 | Jul. 31, 2025 | Apr. 30, 2025 | Jan. 31, 2025 | Oct. 31, 2024 | Jul. 31, 2024 | Apr. 30, 2024 | Jan. 31, 2024 | Sep. 30, 2024 | Sep. 30, 2025 | Oct. 31, 2024 | Oct. 31, 2023
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Net sales | $ 701.3 | $ 1,134.7 | $ 1,101.3 | $ 995.8 | $ 1,107.0 | $ 1,164.9 | $ 1,117.5 | $ 965.5 | $ 3,972.8 | $ 3,933.1 | $ 4,354.9 | $ 4,175.3
Costs of products sold | 541.7 | 877.4 | 841.4 | 801.1 | 879.1 | 920.0 | 874.9 | 781.8 | 3,155.0 | 3,061.6 | 3,455.8 | 3,246.7
Selling, general and administrative expenses | 126.0 | 157.0 | 161.8 | 157.1 | 146.3 | 152.8 | 155.9 | 134.9 | 535.5 | 601.9 | 589.9 | 510.3
Acquisition and integration related costs | 1.7 | 1.2 | 2.0 | 2.2 | 2.4 | 2.0 | 11.5 | 2.6 | 17.4 | 7.1 | 18.5 | 19.0
Restructuring and other charges | 20.1 | 25.2 | 14.6 | 2.7 | 3.8 | 2.7 | (6.8) | 5.7 | 2.7 | 62.6 | 5.4 | 18.7
Non-cash asset impairment charges | 10.1 | 3.4 | 10.7 | 13.7 | 0.7 | 0.2 | 0.4 | 1.3 | 2.3 | 37.9 | 2.6 | 20.3
Gain on disposal of properties, plants and equipment, net |  |  |  |  |  |  |  |  | (7.1) | (7.5) | (9.1) | (2.5)
Loss (gain) on disposal of businesses, net | 0.5 | 0.0 | 0.5 | 0.9 | 0.1 | (46.1) | 0.0 | 0.0 | (46.1) | 1.9 | (46.0) | (64.0)
Operating profit | $ 5.0 | $ 73.1 | $ 69.8 | $ 19.7 | $ 77.3 | $ 136.7 | $ 81.9 | $ 41.9 | $ 313.1 | 167.6 | 337.8 | 426.8
Customized Polymer Solutions |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  | 1,169.6 | 1,135.1 | 917.1
Costs of products sold |  |  |  |  |  |  |  |  |  | 915.9 | 912.4 | 706.3
Selling, general and administrative expenses |  |  |  |  |  |  |  |  |  | 207.2 | 164.0 | 110.8
Acquisition and integration related costs |  |  |  |  |  |  |  |  |  | 7.1 | 17.2 | 10.8
Restructuring and other charges |  |  |  |  |  |  |  |  |  | 9.6 | 2.3 | 2.1
Non-cash asset impairment charges |  |  |  |  |  |  |  |  |  | 3.1 | 0.3 | 0.1
Gain on disposal of properties, plants and equipment, net |  |  |  |  |  |  |  |  |  | (0.2) | (0.2) | 0.2
Loss (gain) on disposal of businesses, net |  |  |  |  |  |  |  |  |  | 0.0 | 0.0 | (9.4)
Operating profit |  |  |  |  |  |  |  |  |  | 26.9 | 39.1 | 96.2
Durable Metal Solutions |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  | 1,368.2 | 1,602.1 | 1,631.7
Costs of products sold |  |  |  |  |  |  |  |  |  | 1,085.7 | 1,282.9 | 1,323.1
Selling, general and administrative expenses |  |  |  |  |  |  |  |  |  | 167.3 | 183.7 | 166.5
Acquisition and integration related costs |  |  |  |  |  |  |  |  |  | 0.0 | 0.0 | 0.0
Restructuring and other charges |  |  |  |  |  |  |  |  |  | 12.5 | 3.0 | 1.7
Non-cash asset impairment charges |  |  |  |  |  |  |  |  |  | 2.3 | 0.4 | 1.8
Gain on disposal of properties, plants and equipment, net |  |  |  |  |  |  |  |  |  | (7.6) | (2.8) | (4.5)
Loss (gain) on disposal of businesses, net |  |  |  |  |  |  |  |  |  | 0.0 | 0.0 | 0.0
Operating profit |  |  |  |  |  |  |  |  |  | 108.0 | 134.9 | 143.1
Sustainable Fiber Solutions |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  | 1,096.9 | 1,242.3 | 1,307.9
Costs of products sold |  |  |  |  |  |  |  |  |  | 846.9 | 994.3 | 988.4
Selling, general and administrative expenses |  |  |  |  |  |  |  |  |  | 154.0 | 161.7 | 167.5
Acquisition and integration related costs |  |  |  |  |  |  |  |  |  | 0.0 | 1.3 | 8.2
Restructuring and other charges |  |  |  |  |  |  |  |  |  | 36.4 | (0.8) | 12.5
Non-cash asset impairment charges |  |  |  |  |  |  |  |  |  | 31.8 | 1.7 | 17.7
Gain on disposal of properties, plants and equipment, net |  |  |  |  |  |  |  |  |  | 0.3 | (3.4) | 2.1
Loss (gain) on disposal of businesses, net |  |  |  |  |  |  |  |  |  | 0.5 | 0.0 | (54.6)
Operating profit |  |  |  |  |  |  |  |  |  | 27.0 | 87.5 | 166.1
Integrated Solutions |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  | 298.4 | 375.4 | 318.6
Costs of products sold |  |  |  |  |  |  |  |  |  | 213.1 | 266.2 | 228.9
Selling, general and administrative expenses |  |  |  |  |  |  |  |  |  | 73.4 | 80.5 | 65.5
Acquisition and integration related costs |  |  |  |  |  |  |  |  |  | 0.0 | 0.0 | 0.0
Restructuring and other charges |  |  |  |  |  |  |  |  |  | 4.1 | 0.9 | 2.4
Non-cash asset impairment charges |  |  |  |  |  |  |  |  |  | 0.7 | 0.2 | 0.7
Gain on disposal of properties, plants and equipment, net |  |  |  |  |  |  |  |  |  | 0.0 | (2.7) | (0.3)
Loss (gain) on disposal of businesses, net |  |  |  |  |  |  |  |  |  | 1.4 | (46.0) | 0.0
Operating profit |  |  |  |  |  |  |  |  |  | 5.7 | 76.3 | 21.4
United States |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  | 2,025.9 | 2,312.5 | 2,289.0
United States | Customized Polymer Solutions |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  | 496.3 | 508.8 | 442.3
United States | Durable Metal Solutions |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  | 251.8 | 314.7 | 336.4
United States | Sustainable Fiber Solutions |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  | 1,051.9 | 1,188.4 | 1,254.4
United States | Integrated Solutions |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  | 225.9 | 300.6 | 255.9
Europe, Middle East and Africa |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  | 1,309.7 | 1,388.0 | 1,310.9
Europe, Middle East and Africa | Customized Polymer Solutions |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  | 467.4 | 438.2 | 380.1
Europe, Middle East and Africa | Durable Metal Solutions |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  | 798.8 | 905.1 | 893.4
Europe, Middle East and Africa | Sustainable Fiber Solutions |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  | 0.9 | 0.7 | 0.6
Europe, Middle East and Africa | Integrated Solutions |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  | 42.6 | 44.0 | 36.8
Asia Pacific and Other Americas |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  | 597.5 | 654.4 | 575.4
Asia Pacific and Other Americas | Customized Polymer Solutions |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  | 205.9 | 188.1 | 94.7
Asia Pacific and Other Americas | Durable Metal Solutions |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  | 317.6 | 382.3 | 401.9
Asia Pacific and Other Americas | Sustainable Fiber Solutions |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  | 44.1 | 53.2 | 52.9
Asia Pacific and Other Americas | Integrated Solutions |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  | $ 29.9 | $ 30.8 | $ 25.9

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