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Segment Information - Reconciliation of Operating Profit (Loss) from Segments to Consolidated (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]          
Reportable segment income $ 166.3 $ 133.2 $ 453.0 $ 410.0  
Restructuring and other (2.7) (2.8) (6.7) (5.4)  
Intangible amortization (41.9) (26.8) (106.0) (66.7)  
Net interest expense (20.9) (30.4) (55.9) (76.6)  
Other expense (1.2) (1.2) (3.4) (3.3)  
Income from continuing operations before income taxes 144.2 101.6 393.7 330.1  
Assets 6,765.7   6,765.7   $ 6,734.9
Depreciation 16.8 13.0 45.0 37.8  
Capital expenditures     56.6 47.5  
Discontinued Operations, Held-for-Sale          
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]          
Assets, discontinued operation         1,276.1
Operating Segments          
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]          
Reportable segment income 247.8 197.0 669.1 573.3  
Assets 6,623.2   6,623.2   5,284.0
Depreciation 15.7 12.0 41.6 35.0  
Capital expenditures     51.8 45.3  
Operating Segments | Systems Protection          
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]          
Reportable segment income 146.2 104.4 387.5 303.0  
Restructuring and other (0.4) (0.7) (1.0) (1.1)  
Assets 3,342.2   3,342.2   2,129.3
Depreciation 9.6 6.5 23.6 18.8  
Capital expenditures     37.1 28.7  
Operating Segments | Electrical Connections          
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]          
Reportable segment income 101.6 92.6 281.6 270.3  
Restructuring and other (2.1) (1.9) (2.9) (3.8)  
Assets 3,281.0   3,281.0   3,154.7
Depreciation 6.1 5.5 18.0 16.2  
Capital expenditures     14.7 16.6  
Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment          
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]          
Restructuring and other (2.7) (2.8) (6.7) (5.9)  
Intangible amortization (41.9) (26.8) (106.0) (66.7)  
Acquisition transaction and integration costs (2.4) (5.6) (9.8) (11.1)  
Net interest expense (20.9) (30.4) (55.9) (76.6)  
Other expense (1.2) (1.2) (3.4) (3.3)  
Capital expenditures     4.8 2.2  
Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment | Enterprise and other          
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]          
Reportable segment income (34.5) (28.6) (93.6) (79.6)  
Segment Reporting, Reconciling Item, Corporate Nonsegment          
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]          
Assets 142.5   142.5   $ 1,450.9
Depreciation $ 1.1 $ 1.0 $ 3.4 $ 2.8