Borrowings - Narrative (Details) $ in Thousands, £ in Millions						12 Months Ended
	Aug. 18, 2023 USD ($)	Feb. 16, 2023 USD ($)	Feb. 06, 2023 USD ($)	Feb. 06, 2023 GBP (£)	Mar. 07, 2019	Sep. 27, 2024 USD ($)	Sep. 29, 2023 USD ($)	Sep. 30, 2022 USD ($) derivative_agreement	Feb. 13, 2023 USD ($)	Mar. 25, 2020 USD ($)	Mar. 25, 2020 GBP (£)
Debt Instrument [Line Items]
Proceeds from long-term borrowings						$ 4,606,697	$ 3,860,468	$ 3,145,500
Treasury Lock
Debt Instrument [Line Items]
Number of instruments held | derivative_agreement								2
Derivative, notional amount								$ 500,000
Line of Credit
Debt Instrument [Line Items]
Letters of credit outstanding						$ 306,200
Fixed Rate Date | Treasury Lock
Debt Instrument [Line Items]
Aggregate principal amount								$ 500,000	$ 500,000
Derivative, fixed interest rate									5.90%
2021 Term Loan Facility
Debt Instrument [Line Items]
Proceeds from long-term borrowings			$ 200,000	£ 650.0
Line of credit facility, amount outstanding							$ 80,000
2020 Term Loan Facility
Debt Instrument [Line Items]
Aggregate principal amount										$ 730,000
2020 Term Loan Facility | Subsidiaries
Debt Instrument [Line Items]
Aggregate principal amount | £											£ 250.0
5.90% Bonds | Senior Notes
Debt Instrument [Line Items]
Aggregate principal amount		$ 500,000
Stated interest rate		5.90%				5.90%
Debt instrument, interest rate, increase (decrease)		0.35%
Debt instrument, redemption price, percentage		100.00%
Long-term debt fair value						$ 521,900
6.35% Bonds | Senior Notes
Debt Instrument [Line Items]
Aggregate principal amount	$ 600,000
Stated interest rate	6.35%					6.35%
Debt instrument, interest rate, increase (decrease)	0.30%
Debt instrument, redemption price, percentage	100.00%
Long-term debt fair value						$ 639,700
$1.6 Billion Revolving Credit Facility
Debt Instrument [Line Items]
Available borrowing capacity						2,110,000
Revolving Credit Facility | Unsecured Revolving Credit Facility February 6, 2023
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity			$ 2,250,000
Revolving Credit Facility | Second Amendment to the Revolving Credit Facility
Debt Instrument [Line Items]
Debt instrument, covenant, leverage ratio, maximum					3.50
Debt Instrument, covenant, leverage ratio, temporary maximum					4.00
Revolving Credit Facility | Second Amendment to the Revolving Credit Facility | Minimum
Debt Instrument [Line Items]
Line of credit facility, unused capacity, commitment fee percentage					0.10%
Revolving Credit Facility | Second Amendment to the Revolving Credit Facility | Maximum
Debt Instrument [Line Items]
Line of credit facility, unused capacity, commitment fee percentage					0.25%
Revolving Credit Facility | 2021 Term Loan Facility
Debt Instrument [Line Items]
Debt instrument, covenant, leverage ratio, maximum			3.50
Debt Instrument, covenant, leverage ratio, temporary maximum			4.00
Revolving Credit Facility | 2020 Term Loan Facility
Debt Instrument [Line Items]
Debt instrument, covenant, leverage ratio, maximum			3.50
Debt Instrument, covenant, leverage ratio, temporary maximum			4.00
Letter of Credit
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity			$ 400,000
Letter of Credit | $1.6 Billion Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, amount outstanding						500
Letter of Credit | Committed And Uncommitted Letter Of Credit Facility
Debt Instrument [Line Items]
Line of credit facility, amount outstanding						$ 305,700
Sub Facility Of Swing Line Loans
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity			$ 100,000