Borrowings - Narrative (Details) $ in Thousands						1 Months Ended	3 Months Ended	12 Months Ended
	Aug. 18, 2023 USD ($)	Feb. 16, 2023 USD ($)	Feb. 06, 2023 USD ($)	Feb. 06, 2023 GBP (£)	Mar. 07, 2019	Dec. 31, 2022 USD ($)	Dec. 30, 2022 USD ($)	Sep. 29, 2023 USD ($)	Sep. 30, 2022 USD ($) derivative_agreement	Oct. 01, 2021 USD ($)	Sep. 29, 2023 GBP (£)	Feb. 13, 2023 USD ($)	Mar. 25, 2020 USD ($)	Mar. 25, 2020 GBP (£)	Mar. 12, 2018 USD ($) series
Debt Instrument [Line Items]
Proceeds from long-term borrowings								$ 3,860,468	$ 3,145,500	$ 4,445,080
Total long-term debt, net								2,813,471	$ 3,357,256
Number of senior notes series | series															3
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								322,000
Senior Notes
Debt Instrument [Line Items]
Repayments of senior debt						$ 19,000	$ 481,000
Fixed Rate Date | Treasury Lock
Debt Instrument [Line Items]
Aggregate principal amount												$ 500,000
Derivative, fixed interest rate												5.90%
2021 Term Loan Facility
Debt Instrument [Line Items]
Proceeds from long-term borrowings			$ 200,000	£ 650,000,000
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 | £														£ 250,000,000
5.90% Bonds | Senior Notes
Debt Instrument [Line Items]
Aggregate principal amount		$ 500,000
Stated interest rate		5.90%						5.90%			5.90%
Debt instrument, interest rate, increase (decrease)		0.35%
Debt instrument, redemption price, percentage		100.00%
Total long-term debt, net								$ 500,000	0
5.90% Bonds | Senior Notes | First Step Up Date
Debt Instrument [Line Items]
Stated interest rate								5.90%			5.90%
Debt instrument, interest rate, increase (decrease)								0.125%
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]
Aggregate principal amount	$ 600,000
Stated interest rate	6.35%							6.35%			6.35%
Debt instrument, interest rate, increase (decrease)	3000.00%
Debt instrument, redemption price, percentage	100.00%
Total long-term debt, net								$ 600,000	0
Senior Notes As Amended Note Purchase Agreement
Debt Instrument [Line Items]
Total long-term debt, net															$ 500,000
$1.6 Billion Revolving Credit Facility
Debt Instrument [Line Items]
Available borrowing capacity								2,240,000
Revolving Credit Facility
Debt Instrument [Line Items]
Total long-term debt, net								$ 10,000	$ 1,105,294		£ 0
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
Revolving Credit Facility | 5.90% Bonds
Debt Instrument [Line Items]
Stated interest rate								5.90%			5.90%
Long-term debt fair value								$ 475,700
Revolving Credit Facility | 6.35% Bonds
Debt Instrument [Line Items]
Stated interest rate								6.35%			6.35%
Long-term debt fair value								$ 598,400
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								900
Letter of Credit | Committed And Uncommitted Letter Of Credit Facility
Debt Instrument [Line Items]
Line of credit facility, amount outstanding								$ 321,100
Sub Facility Of Swing Line Loans
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity			$ 100,000