Derivative Financial Instruments and Hedging - Schedule of Derivatives Designated as Cash Flow Hedges (Details) - Cash Flow Hedging - USD ($) $ in Millions	3 Months Ended
	Mar. 29, 2026	Mar. 30, 2025
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in OCI on Derivatives	$ 1.8	$ 4.9
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income (a)	2.2	(0.8)
Nickel and other raw material contracts
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in OCI on Derivatives	0.9	0.7
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income (a)	0.4	(1.0)
Natural gas contracts
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in OCI on Derivatives	0.6	4.3
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income (a)	1.6	0.1
Foreign exchange contracts
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in OCI on Derivatives	0.3	(0.1)
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income (a)	$ 0.2	$ 0.1