v3.26.1
SEGMENT INFORMATION - Reportable Segment's Results of Operations (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Customer, Extent of Reliance        
Net sales $ 977.9 $ 625.2 $ 1,817.9 $ 1,218.9
Cost of sales 643.9 358.8 1,161.2 702.0
Selling, technical, general and administrative 200.8 155.9 391.9 313.1
Research and development 19.5 16.2 39.7 32.1
Add: Depreciation expense 15.2 9.7 29.7 19.7
Adjusted EBITDA 183.5 136.0 345.8 264.4
Operating Segments        
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Customer, Extent of Reliance        
Net sales 977.9 625.2 1,817.9 1,218.9
Cost of sales 641.0 358.9 1,151.5 701.8
Selling, technical, general and administrative 152.7 119.8 288.8 237.0
Research and development 18.8 15.6 37.8 30.9
Other segment items (2.9) 4.6 23.7 4.5
Add: Depreciation expense 15.2 9.7 29.7 19.7
Electronics        
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Customer, Extent of Reliance        
Net sales 767.0 439.4 1,400.5 833.7
Adjusted EBITDA 141.5 96.5 260.6 185.4
Realized gains (losses) associated with derivatives 1.7 (2.5) (25.0) (2.8)
Electronics | Operating Segments        
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Customer, Extent of Reliance        
Net sales 767.0 439.4 1,400.5 833.7
Cost of sales 528.6 260.6 929.6 493.8
Selling, technical, general and administrative 93.7 71.0 174.2 136.3
Research and development 15.3 12.8 30.8 24.8
Other segment items (1.8) 4.6 25.2 5.3
Add: Depreciation expense 10.3 6.1 19.9 11.9
Specialties        
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Customer, Extent of Reliance        
Net sales 210.9 185.8 417.4 385.2
Adjusted EBITDA 42.0 39.5 85.2 79.0
Specialties | Operating Segments        
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Customer, Extent of Reliance        
Net sales 210.9 185.8 417.4 385.2
Cost of sales 112.4 98.3 221.9 208.0
Selling, technical, general and administrative 59.0 48.8 114.6 100.7
Research and development 3.5 2.8 7.0 6.1
Other segment items (1.1) 0.0 (1.5) (0.8)
Add: Depreciation expense $ 4.9 $ 3.6 $ 9.8 $ 7.8