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Debt - Outstanding Amount of Credit Facilities (Details)	12 Months Ended
	Dec. 31, 2023 USD ($)	Dec. 31, 2023 AUD ($)	Dec. 31, 2023 EUR (€)	Dec. 31, 2022 USD ($)
Line of Credit Facility [Line Items]
Total unsecured debt	$ 3,934,374,000			$ 3,351,185,000
Unamortized discount and debt issuance cost	(28,146,000)			(22,362,000)
Total debt	3,906,228,000			3,328,823,000
Less debt due within one year	355,298,000			252,029,000
Long-term debt, excluding current portion	3,550,930,000			3,076,794,000
Series F Senior Unsecured Notes
Line of Credit Facility [Line Items]
Debt instrument, face amount	$ 250,000,000
Debt instrument, stated percentage	3.24%	3.24%	3.24%
Long-term debt	$ 0			250,000,000
Series A Senior Unsecured Notes, Due 2024
Line of Credit Facility [Line Items]
Debt instrument, face amount		$ 155,000,000
Debt instrument, stated percentage	3.10%	3.10%	3.10%
Long-term debt	$ 105,571,000			105,664,000
Series J Senior Unsecured Notes
Line of Credit Facility [Line Items]
Debt instrument, face amount \| €			€ 225,000,000
Debt instrument, stated percentage	1.40%	1.40%	1.40%
Long-term debt	$ 248,355,000			240,840,000
Senior Unsecured Notes, Due February 1, 2025
Line of Credit Facility [Line Items]
Debt instrument, face amount	$ 500,000,000
Debt instrument, stated percentage	1.75%	1.75%	1.75%
Long-term debt	$ 500,000,000			500,000,000
Series B Senior Unsecured Notes, Due 2026
Line of Credit Facility [Line Items]
Debt instrument, face amount		$ 155,000,000
Debt instrument, stated percentage	3.43%	3.43%	3.43%
Long-term debt	$ 105,571,000			105,664,000
Series H Senior Unsecured Notes
Line of Credit Facility [Line Items]
Debt instrument, face amount	$ 250,000,000
Debt instrument, stated percentage	3.24%	3.24%	3.24%
Long-term debt	$ 250,000,000			250,000,000
Series K Senior Unsecured Notes
Line of Credit Facility [Line Items]
Debt instrument, face amount \| €			€ 250,000,000
Debt instrument, stated percentage	1.81%	1.81%	1.81%
Long-term debt	$ 275,950,000			267,600,000
Series I Senior Unsecured Notes
Line of Credit Facility [Line Items]
Debt instrument, face amount	$ 120,000,000
Debt instrument, stated percentage	3.70%	3.70%	3.70%
Long-term debt	$ 120,000,000			120,000,000
Senior Unsecured Notes, Due November 1, 2028
Line of Credit Facility [Line Items]
Debt instrument, face amount	$ 425,000,000
Debt instrument, stated percentage	6.50%	6.50%	6.50%
Long-term debt	$ 425,000,000			0
Series A Senior Unsecured Notes, Due 2029
Line of Credit Facility [Line Items]
Debt instrument, face amount \| €			€ 50,000,000
Debt instrument, stated percentage	1.55%	1.55%	1.55%
Long-term debt	$ 55,190,000			53,520,000
Series L Senior Unsecured Notes
Line of Credit Facility [Line Items]
Debt instrument, face amount \| €			€ 125,000,000
Debt instrument, stated percentage	2.02%	2.02%	2.02%
Long-term debt	$ 137,975,000			133,800,000
Senior Unsecured Notes, Due November 1, 2030
Line of Credit Facility [Line Items]
Debt instrument, face amount	$ 500,000,000
Debt instrument, stated percentage	1.88%	1.88%	1.88%
Long-term debt	$ 500,000,000			500,000,000
Series B Senior Unsecured Notes, Due 2031
Line of Credit Facility [Line Items]
Debt instrument, face amount \| €			€ 100,000,000
Debt instrument, stated percentage	1.74%	1.74%	1.74%
Long-term debt	$ 110,380,000			107,040,000
Senior Unsecured Notes, Due February 1, 2032
Line of Credit Facility [Line Items]
Debt instrument, face amount	$ 500,000,000
Debt instrument, stated percentage	2.75%	2.75%	2.75%
Long-term debt	$ 500,000,000			500,000,000
Series M Senior Unsecured Notes
Line of Credit Facility [Line Items]
Debt instrument, face amount \| €			€ 100,000,000
Debt instrument, stated percentage	2.32%	2.32%	2.32%
Long-term debt	$ 110,380,000			107,040,000
Senior Unsecured Notes, Due November 1, 2033
Line of Credit Facility [Line Items]
Debt instrument, face amount	$ 375,000,000
Debt instrument, stated percentage	6.88%	6.88%	6.88%
Long-term debt	$ 375,000,000			0
Series C Senior Unsecured Notes
Line of Credit Facility [Line Items]
Debt instrument, face amount \| €			€ 100,000,000
Debt instrument, stated percentage	1.95%	1.95%	1.95%
Long-term debt	$ 110,380,000			107,040,000
Other Unsecured Debt
Line of Credit Facility [Line Items]
Other unsecured debt	4,622,000			2,977,000
Syndicated Facility, Due September 30, 2026 \| Revolving Credit Facility
Line of Credit Facility [Line Items]
Maximum borrowing capacity	1,500,000,000
Line of credit, current	$ 0			$ 0
London Interbank Offered Rate (LIBOR) \| Syndicated Facility, Due September 30, 2026 \| Revolving Credit Facility
Line of Credit Facility [Line Items]
Debt instrument basis spread on variable rate	1.13%