Debt - Credit Agreement - Additional Information (Details) - USD ($)	3 Months Ended		6 Months Ended
	Mar. 31, 2021	Mar. 28, 2020	Mar. 31, 2021	Mar. 28, 2020	Feb. 13, 2020
Debt Instrument [Line Items]
Credit facility amount					$ 1,000,000,000
Periodic interest payment	$ 19,800,000	$ 6,800,000	$ 20,500,000	$ 23,700,000
Interest rate during period	3.30%	4.60%	3.50%	4.80%
Line of Credit
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity expansion amount					$ 500,000,000
Credit facility maturity date			Feb. 13, 2025
Basis spread on Federal Reserve Bank of New York (FRBNY) rate	0.50%		0.50%
Basis spread on adjusted LIBOR			1.00%
Line of Credit | Minimum
Debt Instrument [Line Items]
Variable interest rate, length of time between updates			30 days
Credit facility commitment fees percentage			0.175%
Line of Credit | Minimum | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread on variable rate			1.25%
Line of Credit | Minimum | Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate			0.25%
Line of Credit | Maximum
Debt Instrument [Line Items]
Variable interest rate, length of time between updates			180 days
Credit facility commitment fees percentage			0.30%
Line of Credit | Maximum | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread on variable rate			1.75%
Line of Credit | Maximum | Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate			0.75%
Secured Debt | Revolving Loan, Reset Period One
Debt Instrument [Line Items]
Annual rate for borrowings outstanding	1.75%		1.75%