Senior Unsecured Notes and Secured Debt - Narrative (Details)	1 Months Ended		12 Months Ended
	Jan. 31, 2024 USD ($)	May 31, 2023 USD ($) day $ / shares	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2023 GBP (£)
Debt Instrument [Line Items]
Proceeds from issuance of senior unsecured notes			$ 1,011,780,000	$ 1,040,232,000	$ 1,703,626,000
Interest expense			607,846,000	529,519,000	489,853,000
Unamortized debt issuance expense			93,049,000
Senior Unsecured Notes
Debt Instrument [Line Items]
Debt extinguished			0	$ 0	$ 1,533,752,000
Unamortized debt issuance expense			72,812,000
2.750% Senior Unsecured Notes Due 2028 | Senior Unsecured Notes
Debt Instrument [Line Items]
Face amount		$ 1,035,000,000
Interest rate (in percentage)		2.75%
Proceeds from issuance of senior unsecured notes		$ 1,011,780,000
Interest expense			18,184,000
Amortization of debt issuance costs			2,975,000
Unamortized debt issuance expense			20,245,000
Conversion ratio		0.0104808
Debt instrument, convertible, conversion price (in dollars per share) | $ / shares		$ 95.41
Debt instrument, convertible, threshold percentage of stock price trigger		130.00%
Debt instrument, convertible, threshold trading days | day		20
Consecutive trading days | day		30
Redemption price, percentage		100.00%
4.50% Senior Unsecured Notes Due 2034 | Senior Unsecured Notes
Debt Instrument [Line Items]
Face amount			$ 637,150,000			£ 500,000,000
Interest rate (in percentage)			4.50%			4.50%
4.50% Senior Unsecured Notes Due 2034 | Senior Unsecured Notes | Subsequent Event
Debt Instrument [Line Items]
Debt extinguished	$ 400,000,000
Interest rate (in percentage)	4.50%