Goodwill and Intangible Assets - Purchased Intangible Assets (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 29, 2024	Oct. 01, 2023	Sep. 29, 2024	Oct. 01, 2023	Dec. 31, 2023
Acquired finite-lived intangible assets:
Gross Value	$ 188.3		$ 188.3		$ 188.3
Accumulated Amortization	(139.3)		(139.3)		(132.8)
Net Value	49.0		49.0		55.5
Total intangible assets, Gross value	195.2		195.2		195.2
Total intangible assets, Net value	55.9		55.9		62.4
Aggregate amortization expense for finite-lived intangible assets	2.2	$ 1.5	6.5	$ 4.5
Trade names
Acquired finite-lived intangible assets:
Indefinite-lived trade names	6.9		6.9		6.9
Customer relationships
Acquired finite-lived intangible assets:
Gross Value	80.9		80.9		80.9
Accumulated Amortization	(64.7)		(64.7)		(62.8)
Net Value	16.2		16.2		18.1
Contracts and backlog
Acquired finite-lived intangible assets:
Gross Value	53.1		53.1		53.1
Accumulated Amortization	(42.1)		(42.1)		(38.8)
Net Value	11.0		11.0		14.3
Developed technology and technical know-how
Acquired finite-lived intangible assets:
Gross Value	33.7		33.7		33.7
Accumulated Amortization	(29.1)		(29.1)		(28.2)
Net Value	4.6		4.6		5.5
Trade names
Acquired finite-lived intangible assets:
Gross Value	3.8		3.8		3.8
Accumulated Amortization	(3.0)		(3.0)		(2.7)
Net Value	0.8		0.8		1.1
In-process research and development
Acquired finite-lived intangible assets:
Gross Value	16.8		16.8		16.8
Accumulated Amortization	(0.4)		(0.4)		(0.3)
Net Value	$ 16.4		$ 16.4		$ 16.5