Senior Unsecured Notes and Secured Debt - Outstanding Exchangeable (Details) - USD ($)	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Unsecured Debt [Line Items]
Balance outstanding at year end	$ 15,793,688,000
Total carrying value of debt	15,500,257,000
Senior Unsecured Notes
Unsecured Debt [Line Items]
Balance outstanding at year end	13,326,465,000	$ 13,699,619,000	$ 12,584,529,000	$ 11,707,961,000
Total carrying value of debt	13,162,102,000
2028 Exchangeable Notes | Senior Unsecured Notes
Unsecured Debt [Line Items]
Balance outstanding at year end	1,035,000,000	1,035,000,000
Less: unamortized debt issuance costs	15,622,000	20,245,000
Total carrying value of debt	1,019,378,000	$ 1,014,755,000
2029 Exchangeable Notes | Senior Unsecured Notes
Unsecured Debt [Line Items]
Balance outstanding at year end	1,035,000,000
Less: unamortized debt issuance costs	18,422,000
Total carrying value of debt	$ 1,016,578,000