Revolving Credit Facility and Commercial Paper Programs (Details) € in Millions, £ in Millions	12 Months Ended
	Dec. 31, 2024 USD ($) currency extension	Dec. 31, 2023 USD ($)	Dec. 31, 2024 GBP (£) extension	Dec. 31, 2024 EUR (€) extension	Dec. 31, 2023 EUR (€)
Credit facility
Credit facility origination costs	$ 7,331,000	$ 12,264,000
Commercial paper borrowings outstanding	$ 67,300,000	$ 764,400,000		€ 65.0	€ 583.0
Commercial paper
Credit facility
Weighted average borrowing rate during the period (as a percent)	4.60%	4.80%
U.S. Dollar-Denominated Unsecured Commercial Paper Program | Unsecured Debt
Credit facility
Maximum aggregate capacity of commercial paper program	$ 1,500,000,000
Euro-Denominated Unsecured Commercial Paper Program | Unsecured Debt
Credit facility
Maximum aggregate capacity of commercial paper program	$ 1,500,000,000
Revolving credit facility
Credit facility
Weighted average interest rate at the end of the period (as a percent)	4.40%		4.40%	4.40%
Revolving credit facility | Unsecured Debt
Credit facility
Current borrowing capacity	$ 3,190,000,000
Outstanding balance	$ 1,100,000,000	$ 0	£ 376.0	€ 572.0
Weighted average borrowing rate during the period (as a percent)	5.70%	4.80%
Credit facility origination costs	$ 7,300,000	$ 12,300,000
Revolving credit facility | Multicurrency Credit Facility | Unsecured Debt
Credit facility
Maximum borrowing capacity	$ 4,250,000,000
Number of extensions | extension	2		2	2
Term of extension option	6 months
Number of currencies allowable per facility | currency	14
Credit facility expansion option	$ 1,000,000,000.0
Revolving credit facility | Multicurrency Credit Facility | Unsecured Debt | Secured Overnight Financing Rate (SOFR)
Credit facility
Basis spread on variable rate (as a percent)	0.725%
Basis spread on variable rate, adjustment share (as a percent)	0.10%
Commitment fee (as a percent)	0.125%
All-in drawn variable interest rate (as a percent)	0.95%
Revolving credit facility | Multicurrency Credit Facility | Unsecured Debt | Sterling Overnight Indexed Average (SONIA)
Credit facility
Basis spread on variable rate (as a percent)	0.725%
Basis spread on variable rate, adjustment share (as a percent)	0.0326%
Commitment fee (as a percent)	0.125%
All-in drawn variable interest rate (as a percent)	0.8826%
Revolving credit facility | Multicurrency Credit Facility | Unsecured Debt | Euro Interbank Offered Rate (EURIBOR)
Credit facility
Basis spread on variable rate (as a percent)	0.725%
Commitment fee (as a percent)	0.125%
All-in drawn variable interest rate (as a percent)	0.85%