Related-Party Transactions (Details) - USD ($)		9 Months Ended
	Feb. 10, 2020	Sep. 26, 2021	Sep. 27, 2020
PE Shay Holdings, LLC
Related Party Transaction [Line Items]
Liability for estimated payment to platinum stockholder		$ 4,700,000
Affiliated Entity | Advisory Services
Related Party Transaction [Line Items]
Related party transaction expenses	$ 15,000,000	$ 0	$ 15,800,000
Affiliated Entity | Advisory Services | Selling, General and Administrative Expenses
Related Party Transaction [Line Items]
Related party transaction expenses	$ 800,000