Borrowings - Narrative (Details) $ in Thousands, £ in Millions						6 Months Ended
	Aug. 18, 2023 USD ($)	Feb. 16, 2023 USD ($)	Feb. 06, 2023 USD ($)	Feb. 06, 2023 GBP (£)	Mar. 27, 2019	Mar. 29, 2024 USD ($)	Mar. 31, 2023 USD ($)	Sep. 29, 2023 USD ($)	Feb. 13, 2023 USD ($)	Sep. 30, 2022 USD ($) derivative_agreement	Mar. 25, 2020 USD ($)	Mar. 25, 2020 GBP (£)
Debt Instrument [Line Items]
Proceeds from long-term borrowings						$ 1,716,577	$ 2,075,495
Line of Credit
Debt Instrument [Line Items]
Current maturities of long-term debt						289,700		$ 322,000
Treasury Lock
Debt Instrument [Line Items]
Number of instruments held | derivative_agreement										2
Derivative notional amount										$ 500,000
Fixed Rate Date | Treasury Lock
Debt Instrument [Line Items]
Aggregate principal amount								500,000	$ 500,000
2021 Term Loan Facility
Debt Instrument [Line Items]
Proceeds from long-term borrowings			$ 200,000	£ 650.0
Long-term line of credit								$ 80,000
2020 Term Loan Facility
Debt Instrument [Line Items]
Aggregate principal amount											$ 730,000
2020 Term Loan Facility | U.K. subsidiary
Debt Instrument [Line Items]
Aggregate principal amount | £												£ 250.0
5.90% Bonds | Senior Notes
Debt Instrument [Line Items]
Aggregate principal amount		$ 500,000
Interest rate		5.90%
Interest rate, increase (decrease) over period		0.35%
Redemption price percentage		100.00%
6.35% Bonds | Senior Notes
Debt Instrument [Line Items]
Aggregate principal amount	$ 600,000
Interest rate	6.35%
Interest rate, increase (decrease) over period	0.30%
Redemption price percentage	100.00%
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]
Covenant, leverage ratio, maximum					3.50
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]
Covenant, leverage ratio, maximum			3.50
Covenant, leverage ratio, temporary maximum			4.00
Revolving Credit Facility | 2020 Term Loan Facility
Debt Instrument [Line Items]
Covenant, leverage ratio, maximum			3.50
Covenant, leverage ratio, temporary maximum			4.00
Letter of Credit
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity			$ 400,000
Letter of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Long-term line of credit						500
Letter of Credit | Committed and Uncommitted Letter-of-Credit Facilities
Debt Instrument [Line Items]
Long-term line of credit						$ 289,200
Sub Facility Of Swing Line Loans
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity			$ 100,000