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v3.24.4

Detail of secured and unsecured senior debt (Details) - USD ($) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Feb. 29, 2024 | Jul. 31, 2023
Debt Instrument [Line Items] |  |  |  |
Effective rate (as a percent) | 3.86% |  |  |
Future principal payments due on secured and unsecured debt |  |  |  |
2025 | $ 600,034 |  |  |
2026 | 799,630 |  |  |
2027 | 350,038 |  |  |
2028 | 425,041 |  |  |
2029 | 700,044 |  |  |
Thereafter | 9,450,394 |  |  |
Outstanding Balance | 12,325,181 |  |  |
Unamortized Discount (Premium) and Debt Issuance Costs, Net | (80,807) |  |  |
Total Consolidated | $ 12,244,374 |  |  |
Alexandria | 99 Coolidge Avenue |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Noncontrolling interest, ownership percentage by parent | 75.00% |  |  |
Secured notes payable |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Effective rate (as a percent) | 7.51% |  |  |
Future principal payments due on secured and unsecured debt |  |  |  |
2025 | $ 34 |  |  |
2026 | 149,630 |  |  |
2027 | 38 |  |  |
2028 | 41 |  |  |
2029 | 44 |  |  |
Thereafter | 394 |  |  |
Outstanding Balance | 150,181 |  |  |
Unamortized Discount (Premium) and Debt Issuance Costs, Net | (272) |  |  |
Total Consolidated | $ 149,909 |  |  |
Secured notes payable maturing on 11/19/26 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Applicable margin (as a percent) | 2.70% |  |  |
Effective rate (as a percent) | 7.52% |  |  |
Maturity date | Nov. 19, 2026 |  |  |
Future principal payments due on secured and unsecured debt |  |  |  |
2025 | $ 0 |  |  |
2026 | 149,594 |  |  |
2027 | 0 |  |  |
2028 | 0 |  |  |
2029 | 0 |  |  |
Thereafter | 0 |  |  |
Outstanding Balance | 149,594 |  |  |
Unamortized Discount (Premium) and Debt Issuance Costs, Net | (272) |  |  |
Total Consolidated | 149,322 |  |  |
Secured notes payable maturing on 11/19/26 | 99 Coolidge Avenue |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt instrument, borrowing capacity | $ 45,700 |  |  |
Secured notes payable maturing on 7/1/36 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate (as a percent) | 6.50% |  |  |
Effective rate (as a percent) | 6.50% |  |  |
Maturity date | Jul. 01, 2036 |  |  |
Future principal payments due on secured and unsecured debt |  |  |  |
2025 | $ 34 |  |  |
2026 | 36 |  |  |
2027 | 38 |  |  |
2028 | 41 |  |  |
2029 | 44 |  |  |
Thereafter | 394 |  |  |
Outstanding Balance | 587 |  |  |
Unamortized Discount (Premium) and Debt Issuance Costs, Net | 0 |  |  |
Total Consolidated | $ 587 |  |  |
Unsecured Debt |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Effective rate (as a percent) | 3.81% |  |  |
Future principal payments due on secured and unsecured debt |  |  |  |
2025 | $ 600,000 |  |  |
2026 | 650,000 |  |  |
2027 | 350,000 |  |  |
2028 | 425,000 |  |  |
2029 | 700,000 |  |  |
Thereafter | 9,450,000 |  |  |
Outstanding Balance | 12,175,000 |  |  |
Unamortized Discount (Premium) and Debt Issuance Costs, Net | (80,535) |  |  |
Total Consolidated | $ 12,094,465 |  |  |
Unsecured senior line of credit |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Applicable margin (as a percent) | 0.855% | 0.875% |  |
Future principal payments due on secured and unsecured debt |  |  |  |
Total Consolidated | $ 0 |  |  |
3.45% unsecured senior notes payable |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate (as a percent) | 3.45% |  |  |
Effective rate (as a percent) | 3.62% |  |  |
Maturity date | Apr. 30, 2025 |  |  |
Future principal payments due on secured and unsecured debt |  |  |  |
2025 | $ 600,000 |  |  |
2026 | 0 |  |  |
2027 | 0 |  |  |
2028 | 0 |  |  |
2029 | 0 |  |  |
Thereafter | 0 |  |  |
Outstanding Balance | 600,000 |  |  |
Unamortized Discount (Premium) and Debt Issuance Costs, Net | (296) |  |  |
Total Consolidated | $ 599,704 |  |  |
4.30% unsecured senior notes payable |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate (as a percent) | 4.30% |  |  |
Effective rate (as a percent) | 4.50% |  |  |
Maturity date | Jan. 15, 2026 |  |  |
Future principal payments due on secured and unsecured debt |  |  |  |
2025 | $ 0 |  |  |
2026 | 300,000 |  |  |
2027 | 0 |  |  |
2028 | 0 |  |  |
2029 | 0 |  |  |
Thereafter | 0 |  |  |
Outstanding Balance | 300,000 |  |  |
Unamortized Discount (Premium) and Debt Issuance Costs, Net | (532) |  |  |
Total Consolidated | $ 299,468 |  |  |
3.80% Unsecured Senior Notes Payable |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate (as a percent) | 3.80% |  |  |
Effective rate (as a percent) | 3.96% |  |  |
Maturity date | Apr. 15, 2026 |  |  |
Future principal payments due on secured and unsecured debt |  |  |  |
2025 | $ 0 |  |  |
2026 | 350,000 |  |  |
2027 | 0 |  |  |
2028 | 0 |  |  |
2029 | 0 |  |  |
Thereafter | 0 |  |  |
Outstanding Balance | 350,000 |  |  |
Unamortized Discount (Premium) and Debt Issuance Costs, Net | (653) |  |  |
Total Consolidated | $ 349,347 |  |  |
3.95% unsecured senior notes payable due in 2027 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate (as a percent) | 3.95% |  |  |
Effective rate (as a percent) | 4.13% |  |  |
Maturity date | Jan. 15, 2027 |  |  |
Future principal payments due on secured and unsecured debt |  |  |  |
2025 | $ 0 |  |  |
2026 | 0 |  |  |
2027 | 350,000 |  |  |
2028 | 0 |  |  |
2029 | 0 |  |  |
Thereafter | 0 |  |  |
Outstanding Balance | 350,000 |  |  |
Unamortized Discount (Premium) and Debt Issuance Costs, Net | (1,067) |  |  |
Total Consolidated | $ 348,933 |  |  |
3.95% unsecured senior notes payable due in 2028 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate (as a percent) | 3.95% |  |  |
Effective rate (as a percent) | 4.07% |  |  |
Maturity date | Jan. 15, 2028 |  |  |
Future principal payments due on secured and unsecured debt |  |  |  |
2025 | $ 0 |  |  |
2026 | 0 |  |  |
2027 | 0 |  |  |
2028 | 425,000 |  |  |
2029 | 0 |  |  |
Thereafter | 0 |  |  |
Outstanding Balance | 425,000 |  |  |
Unamortized Discount (Premium) and Debt Issuance Costs, Net | (1,312) |  |  |
Total Consolidated | $ 423,688 |  |  |
4.50% unsecured senior notes payable |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate (as a percent) | 4.50% |  |  |
Effective rate (as a percent) | 4.60% |  |  |
Maturity date | Jul. 30, 2029 |  |  |
Future principal payments due on secured and unsecured debt |  |  |  |
2025 | $ 0 |  |  |
2026 | 0 |  |  |
2027 | 0 |  |  |
2028 | 0 |  |  |
2029 | 300,000 |  |  |
Thereafter | 0 |  |  |
Outstanding Balance | 300,000 |  |  |
Unamortized Discount (Premium) and Debt Issuance Costs, Net | (1,027) |  |  |
Total Consolidated | $ 298,973 |  |  |
2.75% Unsecured Senior Notes Payable Due 2029 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate (as a percent) | 2.75% |  |  |
Effective rate (as a percent) | 2.87% |  |  |
Maturity date | Dec. 15, 2029 |  |  |
Future principal payments due on secured and unsecured debt |  |  |  |
2025 | $ 0 |  |  |
2026 | 0 |  |  |
2027 | 0 |  |  |
2028 | 0 |  |  |
2029 | 400,000 |  |  |
Thereafter | 0 |  |  |
Outstanding Balance | 400,000 |  |  |
Unamortized Discount (Premium) and Debt Issuance Costs, Net | (2,064) |  |  |
Total Consolidated | $ 397,936 |  |  |
4.70% unsecured senior note payable |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate (as a percent) | 4.70% |  |  |
Effective rate (as a percent) | 4.81% |  |  |
Maturity date | Jul. 01, 2030 |  |  |
Future principal payments due on secured and unsecured debt |  |  |  |
2025 | $ 0 |  |  |
2026 | 0 |  |  |
2027 | 0 |  |  |
2028 | 0 |  |  |
2029 | 0 |  |  |
Thereafter | 450,000 |  |  |
Outstanding Balance | 450,000 |  |  |
Unamortized Discount (Premium) and Debt Issuance Costs, Net | (2,057) |  |  |
Total Consolidated | $ 447,943 |  |  |
4.90% Unsecured Senior Notes Payable |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate (as a percent) | 4.90% |  |  |
Effective rate (as a percent) | 5.05% |  |  |
Maturity date | Dec. 15, 2030 |  |  |
Future principal payments due on secured and unsecured debt |  |  |  |
2025 | $ 0 |  |  |
2026 | 0 |  |  |
2027 | 0 |  |  |
2028 | 0 |  |  |
2029 | 0 |  |  |
Thereafter | 700,000 |  |  |
Outstanding Balance | 700,000 |  |  |
Unamortized Discount (Premium) and Debt Issuance Costs, Net | (4,730) |  |  |
Total Consolidated | $ 695,270 |  |  |
3.375% Unsecured Senior Notes Payable |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate (as a percent) | 3.375% |  |  |
Effective rate (as a percent) | 3.48% |  |  |
Maturity date | Aug. 15, 2031 |  |  |
Future principal payments due on secured and unsecured debt |  |  |  |
2025 | $ 0 |  |  |
2026 | 0 |  |  |
2027 | 0 |  |  |
2028 | 0 |  |  |
2029 | 0 |  |  |
Thereafter | 750,000 |  |  |
Outstanding Balance | 750,000 |  |  |
Unamortized Discount (Premium) and Debt Issuance Costs, Net | (4,348) |  |  |
Total Consolidated | $ 745,652 |  |  |
2.00% Unsecured Senior Notes Payable |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate (as a percent) | 2.00% |  |  |
Effective rate (as a percent) | 2.12% |  |  |
Maturity date | May 18, 2032 |  |  |
Future principal payments due on secured and unsecured debt |  |  |  |
2025 | $ 0 |  |  |
2026 | 0 |  |  |
2027 | 0 |  |  |
2028 | 0 |  |  |
2029 | 0 |  |  |
Thereafter | 900,000 |  |  |
Outstanding Balance | 900,000 |  |  |
Unamortized Discount (Premium) and Debt Issuance Costs, Net | (6,967) |  |  |
Total Consolidated | $ 893,033 |  |  |
1.875% Unsecured Senior Notes Payable |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate (as a percent) | 1.875% |  |  |
Effective rate (as a percent) | 1.97% |  |  |
Maturity date | Feb. 01, 2033 |  |  |
Future principal payments due on secured and unsecured debt |  |  |  |
2025 | $ 0 |  |  |
2026 | 0 |  |  |
2027 | 0 |  |  |
2028 | 0 |  |  |
2029 | 0 |  |  |
Thereafter | 1,000,000 |  |  |
Outstanding Balance | 1,000,000 |  |  |
Unamortized Discount (Premium) and Debt Issuance Costs, Net | (7,109) |  |  |
Total Consolidated | $ 992,891 |  |  |
2.95% Unsecured Senior Notes Payable |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate (as a percent) | 2.95% |  |  |
Effective rate (as a percent) | 3.07% |  |  |
Maturity date | Mar. 15, 2034 |  |  |
Future principal payments due on secured and unsecured debt |  |  |  |
2025 | $ 0 |  |  |
2026 | 0 |  |  |
2027 | 0 |  |  |
2028 | 0 |  |  |
2029 | 0 |  |  |
Thereafter | 800,000 |  |  |
Outstanding Balance | 800,000 |  |  |
Unamortized Discount (Premium) and Debt Issuance Costs, Net | (7,236) |  |  |
Total Consolidated | $ 792,764 |  |  |
4.75% Unsecured Senior Notes Payable |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate (as a percent) | 4.75% |  |  |
Effective rate (as a percent) | 4.88% |  |  |
Maturity date | Apr. 15, 2035 |  |  |
Future principal payments due on secured and unsecured debt |  |  |  |
2025 | $ 0 |  |  |
2026 | 0 |  |  |
2027 | 0 |  |  |
2028 | 0 |  |  |
2029 | 0 |  |  |
Thereafter | 500,000 |  |  |
Outstanding Balance | 500,000 |  |  |
Unamortized Discount (Premium) and Debt Issuance Costs, Net | (4,958) |  |  |
Total Consolidated | $ 495,042 |  |  |
5.25% Unsecured Senior Notes Payable |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate (as a percent) | 5.25% |  | 5.25% |
Effective rate (as a percent) | 5.38% |  |  |
Maturity date | May 15, 2036 |  |  |
Future principal payments due on secured and unsecured debt |  |  |  |
2025 | $ 0 |  |  |
2026 | 0 |  |  |
2027 | 0 |  |  |
2028 | 0 |  |  |
2029 | 0 |  |  |
Thereafter | 400,000 |  |  |
Outstanding Balance | 400,000 |  | $ 400,000 |
Unamortized Discount (Premium) and Debt Issuance Costs, Net | (4,109) |  |  |
Total Consolidated | $ 395,891 |  |  |
4.85% Unsecured Senior Note Payable |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate (as a percent) | 4.85% |  |  |
Effective rate (as a percent) | 4.93% |  |  |
Maturity date | Apr. 15, 2049 |  |  |
Future principal payments due on secured and unsecured debt |  |  |  |
2025 | $ 0 |  |  |
2026 | 0 |  |  |
2027 | 0 |  |  |
2028 | 0 |  |  |
2029 | 0 |  |  |
Thereafter | 300,000 |  |  |
Outstanding Balance | 300,000 |  |  |
Unamortized Discount (Premium) and Debt Issuance Costs, Net | (2,872) |  |  |
Total Consolidated | $ 297,128 |  |  |
4.00% Unsecured Senior Notes Payables Due 2050 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate (as a percent) | 4.00% |  |  |
Effective rate (as a percent) | 3.91% |  |  |
Maturity date | Feb. 01, 2050 |  |  |
Future principal payments due on secured and unsecured debt |  |  |  |
2025 | $ 0 |  |  |
2026 | 0 |  |  |
2027 | 0 |  |  |
2028 | 0 |  |  |
2029 | 0 |  |  |
Thereafter | 700,000 |  |  |
Outstanding Balance | 700,000 |  |  |
Unamortized Discount (Premium) and Debt Issuance Costs, Net | 9,985 |  |  |
Total Consolidated | $ 709,985 |  |  |
3.00% Unsecured Senior Notes Payable |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate (as a percent) | 3.00% |  |  |
Effective rate (as a percent) | 3.08% |  |  |
Maturity date | May 18, 2051 |  |  |
Future principal payments due on secured and unsecured debt |  |  |  |
2025 | $ 0 |  |  |
2026 | 0 |  |  |
2027 | 0 |  |  |
2028 | 0 |  |  |
2029 | 0 |  |  |
Thereafter | 850,000 |  |  |
Outstanding Balance | 850,000 |  |  |
Unamortized Discount (Premium) and Debt Issuance Costs, Net | (11,227) |  |  |
Total Consolidated | $ 838,773 |  |  |
3.55% Unsecured Senior Notes Payable |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate (as a percent) | 3.55% |  |  |
Effective rate (as a percent) | 3.63% |  |  |
Maturity date | Mar. 15, 2052 |  |  |
Future principal payments due on secured and unsecured debt |  |  |  |
2025 | $ 0 |  |  |
2026 | 0 |  |  |
2027 | 0 |  |  |
2028 | 0 |  |  |
2029 | 0 |  |  |
Thereafter | 1,000,000 |  |  |
Outstanding Balance | 1,000,000 |  |  |
Unamortized Discount (Premium) and Debt Issuance Costs, Net | (13,673) |  |  |
Total Consolidated | $ 986,327 |  |  |
5.15% Unsecured Senior Notes Payable |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate (as a percent) | 5.15% |  |  |
Effective rate (as a percent) | 5.26% |  |  |
Maturity date | Apr. 15, 2053 |  |  |
Future principal payments due on secured and unsecured debt |  |  |  |
2025 | $ 0 |  |  |
2026 | 0 |  |  |
2027 | 0 |  |  |
2028 | 0 |  |  |
2029 | 0 |  |  |
Thereafter | 500,000 |  |  |
Outstanding Balance | 500,000 |  |  |
Unamortized Discount (Premium) and Debt Issuance Costs, Net | (7,592) |  |  |
Total Consolidated | $ 492,408 |  |  |
5.625% Unsecured Senior Notes Payable |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate (as a percent) | 5.625% |  | 5.625% |
Effective rate (as a percent) | 5.71% |  |  |
Maturity date | May 15, 2054 |  |  |
Future principal payments due on secured and unsecured debt |  |  |  |
2025 | $ 0 |  |  |
2026 | 0 |  |  |
2027 | 0 |  |  |
2028 | 0 |  |  |
2029 | 0 |  |  |
Thereafter | 600,000 |  |  |
Outstanding Balance | 600,000 |  | $ 600,000 |
Unamortized Discount (Premium) and Debt Issuance Costs, Net | (6,691) |  |  |
Total Consolidated | 593,309 |  |  |
Commercial paper program |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Commercial paper, maximum issuance |  |  |  | $ 2,500,000
Future principal payments due on secured and unsecured debt |  |  |  |
Outstanding Balance | $ 0 |  |  |
Commercial paper program | Unsecured senior line of credit |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Maturity date | Jan. 22, 2030 |  |  |
Future principal payments due on secured and unsecured debt |  |  |  |
2025 | $ 0 |  |  |
2026 | 0 |  |  |
2027 | 0 |  |  |
2028 | 0 |  |  |
2029 | 0 |  |  |
Thereafter | 0 |  |  |
Outstanding Balance | 0 |  |  |
Unamortized Discount (Premium) and Debt Issuance Costs, Net | 0 |  |  |
Total Consolidated | $ 0 |  |  |

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