Segment Information - Reconciliation of Income from Continuing Operations from Segments to Consolidated (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating Income (Loss)	$ 616.8	$ 527.1	$ 462.7
Goodwill, impairment loss	0.0	0.0	0.0
Impairment of equity investments	0.0	(8.8)	0.0
Restructuring costs	(7.5)	(7.0)	(3.9)
Amortization	(147.1)	(94.7)	(69.5)
Equity Method Investment, Realized Gain (Loss) on Disposal	0.0	0.0	10.3
Income before income taxes	550.0	429.2	375.3
Assets	6,851.9	6,734.9
Depreciation	60.7	51.3	43.7
Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating Income (Loss)	909.6	757.6	677.2
Assets	6,623.2	5,284.0
Depreciation	56.0	47.5	38.7
Operating Segments | Systems Protection
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating Income (Loss)	537.0	403.1	346.6
Restructuring costs	(1.2)	(1.2)	(1.4)
Assets	3,342.2	2,129.3
Depreciation	31.9	25.7	22.4
Operating Segments | Electrical Connections
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating Income (Loss)	372.6	354.5	330.6
Restructuring costs	(3.4)	(4.8)	(1.6)
Assets	3,281.0	3,154.7
Depreciation	24.1	21.8	16.3
Enterprise and other
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating Income (Loss)	(123.8)	(105.6)	(110.6)
Restructuring costs	(2.9)	(1.0)	(0.9)
Assets	228.7	1,450.9
Depreciation	4.7	3.8	5.0
Enterprise and other | Discontinued Operations, Held-for-Sale
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total assets held for sale		1,276.1
Other Reconciling Items
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Impairment of equity investments	0.0	8.8	0.0
Restructuring costs	(7.5)	(7.5)	(3.9)
Amortization	(147.1)	(94.7)	(69.5)
Mark-to-market actuarial gains (losses) on pension and post-retirement benefit plans	12.9	0.1	(13.4)
Business Combination, Acquisition Related Costs	(14.4)	(13.9)	(12.8)
Inventory Step Up Related To Merger	0.0	0.0	(17.7)
Equity Method Investment, Realized Gain (Loss) on Disposal	0.0	0.0	10.3
Interest Income (Expense), Operating and Nonoperating	(75.0)	(106.0)	(79.4)
Other Nonoperating Expense	$ (4.7)	$ 8.0	$ (4.9)