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PA Consulting Redeemable Noncontrolling Interests - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		12 Months Ended
	Sep. 27, 2024	Sep. 29, 2023	Sep. 27, 2024	Sep. 29, 2023	Sep. 30, 2022	Mar. 02, 2021
Business Acquisition [Line Items]
Repurchase of redeemable noncontrolling interests			$ 55,344	$ 92,939	$ 46,074
Proceeds from issuances of redeemable noncontrolling interests			19,761	34,016	49,742
Redeemable Noncontrolling interests redemption value adjustment (See Note 15- PA Consulting Business Combination)			$ 2,600	8,300
Preference share effect on basic earnings per share (in dollars per share)	$ 0.02	$ 0.07
Temporary equity, fair value adjustment of redeemable noncontrolling interest, price per share (in dollars per share)			$ (0.10)
PA Consulting Group Limited
Business Acquisition [Line Items]
Allocated share-based compensation expense			$ 13,400	800
Cash in employee benefit trust	$ 2,100	$ 2,800	2,100	2,800
PA Consulting Employees
Business Acquisition [Line Items]
Proceeds from issuances of redeemable noncontrolling interests			$ 19,800	$ 34,000	$ 49,700
Ownership interest of employees	70.00%	69.00%	70.00%	69.00%		35.00%

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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