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Related Party Transactions - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 27, 2026	Jun. 28, 2025	Jun. 27, 2026	Jun. 28, 2025	Dec. 27, 2025	Apr. 03, 2018
Related Party Transaction [Line Items]
Selling, general and administrative	$ 831.0	$ 778.0	$ 1,640.0	$ 1,516.0
Current operating lease liabilities	76.0		76.0		$ 78.0
Noncurrent operating lease liabilities	275.0		275.0		251.0
Equity Method Investee [Member]
Related Party Transaction [Line Items]
Other liabilities	3.0		3.0		7.0
Due from related party	31.0		31.0		39.0
Revenues	6.0	15.0	14.0	28.0
Purchases from related party	2.0	3.0	4.0	5.0
Employees and Minority Shareholders [Member]
Related Party Transaction [Line Items]
Current operating lease liabilities	5.0		5.0		5.0
Noncurrent operating lease liabilities	$ 19.0		$ 19.0		$ 22.0
Employees and Minority Shareholders [Member] \| Operating Lease Liabilities, Current [Member] \| Related Party Concentration Risk[Member]
Related Party Transaction [Line Items]
Concentration risk percentage			7.00%		6.60%
Employees and Minority Shareholders [Member] \| Operating Lease Liabilities, Non-Current [Member] \| Related Party Concentration Risk[Member]
Related Party Transaction [Line Items]
Concentration risk percentage			7.00%		8.70%
Employees and Minority Shareholders [Member] \| Minimum [Member]
Related Party Transaction [Line Items]
Remaining operating lease term	1 year		1 year
Employees and Minority Shareholders [Member] \| Maximum [Member]
Related Party Transaction [Line Items]
Remaining operating lease term	11 years		11 years
Internet Brands Inc [Member] \| Co Venturer [Member]
Related Party Transaction [Line Items]
Extend time-based trigger and pause exercise of put option, period (in years)			4 years
Internet Brands Inc [Member] \| Co Venturer [Member] \| Royalty Agreements [Member]
Related Party Transaction [Line Items]
Period covered by agreement			10 years
Related party agreement amount			$ 31.0
Selling, general and administrative	$ 8.0	$ 8.0	$ 16.0	$ 16.0
Internet Brands Inc [Member] \| Henry Schein One LLC [Member]
Related Party Transaction [Line Items]
Minority interest ownership percentage	33.60%		33.60%			26.00%
Henry Schein One LLC [Member] \| Internet Brands Inc [Member] \| Affiliated Entity [Member]
Related Party Transaction [Line Items]
Other liabilities	$ 1.0		$ 1.0		$ 9.0