Acquisitions - Narrative (Details) $ in Millions			12 Months Ended
	May 23, 2022 USD ($)	Mar. 09, 2022 USD ($)	Dec. 29, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 25, 2022 USD ($)	Oct. 03, 2024 USD ($)	Oct. 03, 2023 USD ($) shares
Business Acquisition [Line Items]
Deferred tax assets, net			$ 59.5	$ 64.0
Goodwill			568.9	569.1
Level 3 | Discount Rate | Income Approach
Business Acquisition [Line Items]
Discount rate	0.064
Level 3 | Royalty Rate | Income Approach | Minimum
Business Acquisition [Line Items]
Discount rate	0.11
Level 3 | Royalty Rate | Income Approach | Maximum
Business Acquisition [Line Items]
Discount rate	0.12
Southern Research Engineering Division
Business Acquisition [Line Items]
Business combination, consideration transferred	$ 79.4	$ 79.4
Cash paid	74.4	74.4
Common stock issued	5.0	$ 5.0
Net liabilities	2.5
Deferred tax assets, net	0.2
Business combination, pro forma information, revenue of acquiree since acquisition date, actual			63.5	53.2	$ 26.8
Business combination, pro forma information, earnings or loss of acquiree since acquisition date, actual			$ 5.1	$ 3.6	$ 2.9
Goodwill	34.3
Accounts receivable	2.9
Southern Research Engineering Division | Trade names
Business Acquisition [Line Items]
Finite-lived intangible assets acquired	$ 0.5
Acquired finite-lived intangible assets, weighted average useful life	5 years
Southern Research Engineering Division | Contracts and backlog
Business Acquisition [Line Items]
Finite-lived intangible assets acquired	$ 2.5
Acquired finite-lived intangible assets, weighted average useful life	3 years
Southern Research Engineering Division | In orocess research and development
Business Acquisition [Line Items]
Finite-lived intangible assets acquired	$ 7.3
Southern Research Engineering Division | Developed technology and technical know-how
Business Acquisition [Line Items]
Finite-lived intangible assets acquired	$ 0.5
Acquired finite-lived intangible assets, weighted average useful life	3 years
Sierra Technical Services Inc
Business Acquisition [Line Items]
Number of common stock shares acquired (in shares) | shares							866,026
Business acquisition, common stock value acquired							$ 12.8
Number of additional common shares to be acquired (in shares) | shares							42,523
Additional equity interests issuable						$ 1.1
Net assets							$ 12.6
Goodwill							10.7
Accounts receivable							11.0
Finite-lived intangible assets acquired							14.0
Deferred revenue							$ 11.4