Borrowings - Narrative (Details) $ in Thousands, £ in Millions, shares in Millions								12 Months Ended
	Mar. 27, 2025 USD ($)	Mar. 27, 2025 GBP (£)	Mar. 13, 2025 USD ($) shares	Aug. 18, 2023 USD ($)	Feb. 16, 2023 USD ($)	Feb. 06, 2023 USD ($)	Feb. 06, 2023 GBP (£)	Sep. 26, 2025 USD ($)	Sep. 27, 2024 USD ($)	Sep. 29, 2023 USD ($)	Mar. 27, 2025 GBP (£)	Mar. 13, 2025 GBP (£)
Debt Instrument [Line Items]
Proceeds from long-term borrowings								$ 2,458,201	$ 4,606,697	$ 3,860,468
Loss on extinguishment of debt								(20,510)	0	$ 0
Letters of credit outstanding									$ 306,200
Letter of Credit
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity						$ 400,000
Letters of credit outstanding								$ 217,000
Sub Facility Of Swing Line Loans
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity						100,000
5.90% Bonds | Senior Notes
Debt Instrument [Line Items]
Stated interest rate					5.90%			5.90%
Long-term debt fair value								$ 527,600
Debt instrument, interest rate, increase (decrease)					0.35%
Debt instrument, redemption price, percentage					100.00%
Aggregate principal amount					$ 500,000
6.35% Bonds | Senior Notes
Debt Instrument [Line Items]
Stated interest rate				6.35%				6.35%
Long-term debt fair value								$ 633,300
Debt instrument, interest rate, increase (decrease)				0.30%
Debt instrument, redemption price, percentage				100.00%
Aggregate principal amount				$ 600,000
Unsecured Revolving Credit Facility February 6, 2023
Debt Instrument [Line Items]
Available borrowing capacity								1,850,000
Unsecured Revolving Credit Facility February 6, 2023 | Revolving Credit Facility
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity						2,250,000
Unsecured Revolving Credit Facility February 6, 2023 | Letter of Credit
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity								300
2021 Term Loan Facility
Debt Instrument [Line Items]
Proceeds from long-term borrowings						$ 200,000	£ 650.0
Line of credit facility, amount outstanding	$ 531,600
2021 Term Loan Facility | Revolving Credit Facility
Debt Instrument [Line Items]
Loss on extinguishment of debt			$ 20,500
2021 Term Loan Facility | Revolving Credit Facility | Common Stock
Debt Instrument [Line Items]
Debt conversion, converted instrument, shares issued (in shares) | shares			19.5
Convertible debt			$ 311,500									£ 239.8
2025 Term Loan Facility
Debt Instrument [Line Items]
Proceeds from long-term borrowings	$ 200,000	£ 410.0
Debt instrument, term	2 years	2 years
Line of credit facility, amount outstanding	$ 120,000										£ 410.2
Committed And Uncommitted Letter Of Credit Facility | Letter of Credit
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity								$ 216,700