Goodwill and Intangible Assets - Purchased Intangible Assets (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 30, 2025	Mar. 31, 2024	Dec. 29, 2024
Acquired finite-lived intangible assets:
Gross Value	$ 198.3		$ 188.3
Accumulated Amortization	(143.6)		(141.4)
Net Value	54.7		46.9
Total intangible assets, gross value	205.2		195.2
Total intangible assets, net value	61.6		53.8
Aggregate amortization expense for finite-lived intangible assets	2.2	$ 2.1
Trade names
Acquired finite-lived intangible assets:
Indefinite-lived trade names	6.9		6.9
Customer relationships
Acquired finite-lived intangible assets:
Gross Value	83.4		80.9
Accumulated Amortization	(66.0)		(65.3)
Net Value	17.4		15.6
Contracts and backlog
Acquired finite-lived intangible assets:
Gross Value	56.1		53.1
Accumulated Amortization	(44.3)		(43.2)
Net Value	11.8		9.9
Non-compete Agreements
Acquired finite-lived intangible assets:
Gross Value	0.5		0.0
Accumulated Amortization	0.0		0.0
Net Value	0.5		0.0
Developed technology and technical know-how
Acquired finite-lived intangible assets:
Gross Value	35.7		33.7
Accumulated Amortization	(29.7)		(29.4)
Net Value	6.0		4.3
Trade names
Acquired finite-lived intangible assets:
Gross Value	5.8		3.8
Accumulated Amortization	(3.1)		(3.1)
Net Value	2.7		0.7
In-process research and development
Acquired finite-lived intangible assets:
Gross Value	16.8		16.8
Accumulated Amortization	(0.5)		(0.4)
Net Value	$ 16.3		$ 16.4