The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Goodwill and Intangibles - Intangibles (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 25, 2022	Sep. 26, 2021	Sep. 25, 2022	Sep. 26, 2021	Dec. 31, 2021
Intangible assets subject to amortization
Gross Carrying Amount	$ 337.9		$ 337.9		$ 343.3
Accumulated Amortization	(256.8)		(256.8)		(250.6)
Net Carrying Amount	81.1		81.1		92.7
Indefinite-lived intangible assets
Indefinite-lived intangible assets	33.8		33.8		35.9
Intangible assets
Gross Carrying Amount	371.7		371.7		379.2
Net Carrying Amount	114.9		114.9		128.6
Aggregate amortization expense for amortized intangible assets	3.0	$ 3.2	9.1	$ 10.5
Patents
Intangible assets subject to amortization
Gross Carrying Amount	16.0		16.0		16.1
Accumulated Amortization	(16.0)		(16.0)		(16.1)
Customer relationships
Intangible assets subject to amortization
Gross Carrying Amount	235.2		235.2		237.5
Accumulated Amortization	(177.2)		(177.2)		(173.1)
Net Carrying Amount	58.0		58.0		64.4
Technology
Intangible assets subject to amortization
Gross Carrying Amount	56.6		56.6		58.6
Accumulated Amortization	(42.9)		(42.9)		(40.7)
Net Carrying Amount	13.7		13.7		17.9
Trade names
Intangible assets subject to amortization
Gross Carrying Amount	25.9		25.9		26.8
Accumulated Amortization	(17.0)		(17.0)		(16.9)
Net Carrying Amount	8.9		8.9		9.9
Other
Intangible assets subject to amortization
Gross Carrying Amount	4.2		4.2		4.3
Accumulated Amortization	(3.7)		(3.7)		(3.8)
Net Carrying Amount	$ 0.5		$ 0.5		$ 0.5