Borrowings - Schedule of Long-term Debt (Details) $ in Thousands				12 Months Ended
	Jun. 27, 2025	Aug. 18, 2023	Feb. 16, 2023	Sep. 26, 2025 USD ($)	Sep. 26, 2025 GBP (£)	Sep. 27, 2024 USD ($)
Debt Instrument [Line Items]
Total Long-term debt, net				$ 2,236,456		$ 1,348,594
Less: Current Portion				0		(870,415)
Less: Deferred Financing Fees				(8,805)		(11,406)
2021 Term Loan Facility - USD Portion
Debt Instrument [Line Items]
Total Long-term debt, net				0		$ 120,000
2021 Term Loan Facility - USD Portion | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Interest rate, effective percentage						6.52%
2021 Term Loan Facility - GBP Portion
Debt Instrument [Line Items]
Total Long-term debt, net				0		$ 870,415
2021 Term Loan Facility - GBP Portion | Sterling Overnight Interbank Average Rate (SONIA)
Debt Instrument [Line Items]
Interest rate, effective percentage						6.23%
2025 Term Loan Facility - USD Portion
Debt Instrument [Line Items]
Total Long-term debt, net				200,000		$ 0
2025 Term Loan Facility - GBP Portion
Debt Instrument [Line Items]
Total Long-term debt, net				550,261		0
5.90% Bonds | Senior Notes
Debt Instrument [Line Items]
Total Long-term debt, net				$ 500,000		500,000
Stated interest rate			5.90%	5.90%	5.90%
Debt instrument, interest rate, increase (decrease)			0.35%
5.90% Bonds | Senior Notes | Second Step Up Date
Debt Instrument [Line Items]
Stated interest rate				5.90%	5.90%
Debt instrument, interest rate, increase (decrease)				0.125%
6.35% Bonds | Senior Notes
Debt Instrument [Line Items]
Total Long-term debt, net				$ 600,000		600,000
Stated interest rate		6.35%		6.35%	6.35%
Debt instrument, interest rate, increase (decrease)		0.30%
Revolving Credit Facility
Debt Instrument [Line Items]
Total Long-term debt, net				$ 395,000	£ 0	$ 140,000
Revolving Credit Facility | Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Interest rate, effective percentage				5.37%	5.37%
Revolving Credit Facility | Secured Overnight Financing Rate (SOFR) | Minimum
Debt Instrument [Line Items]
Margin added to variable rate interest rate				0.975%
Revolving Credit Facility | Secured Overnight Financing Rate (SOFR) | Maximum
Debt Instrument [Line Items]
Margin added to variable rate interest rate				1.725%
Revolving Credit Facility | Base Interest Rate | Minimum
Debt Instrument [Line Items]
Margin added to variable rate interest rate				0.00%
Revolving Credit Facility | Base Interest Rate | Maximum
Debt Instrument [Line Items]
Margin added to variable rate interest rate				0.625%
Revolving Credit Facility | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Interest rate, effective percentage						6.64%
Revolving Credit Facility | Sterling Overnight Interbank Average Rate (SONIA) | Minimum
Debt Instrument [Line Items]
Margin added to variable rate interest rate				0.908%
Revolving Credit Facility | Sterling Overnight Interbank Average Rate (SONIA) | Maximum
Debt Instrument [Line Items]
Margin added to variable rate interest rate				1.658%
Revolving Credit Facility | Base Rate | Minimum
Debt Instrument [Line Items]
Margin added to variable rate interest rate				0.00%
Revolving Credit Facility | Base Rate | Maximum
Debt Instrument [Line Items]
Margin added to variable rate interest rate				0.625%
Revolving Credit Facility | 2025 Term Loan Facility - USD Portion
Debt Instrument [Line Items]
Interest rate, effective percentage				5.42%	5.42%
Revolving Credit Facility | 2025 Term Loan Facility - GBP Portion
Debt Instrument [Line Items]
Interest rate, effective percentage				4.97%	4.97%
Revolving Credit Facility | 2025 Term Loan Facility | Secured Overnight Financing Rate (SOFR) | Minimum
Debt Instrument [Line Items]
Margin added to variable rate interest rate	0.975%
Revolving Credit Facility | 2025 Term Loan Facility | Secured Overnight Financing Rate (SOFR) | Maximum
Debt Instrument [Line Items]
Margin added to variable rate interest rate	1.60%
Revolving Credit Facility | 2025 Term Loan Facility | Base Rate | Minimum
Debt Instrument [Line Items]
Margin added to variable rate interest rate	0.00%
Revolving Credit Facility | 2025 Term Loan Facility | Base Rate | Maximum
Debt Instrument [Line Items]
Margin added to variable rate interest rate	0.50%