| USD ($) $ in Thousands | Jun 30, 2026 | Mar 31, 2026 | Sep 30, 2025 | Jun 30, 2025 | Mar 31, 2025 | Sep 30, 2024 | Jun 30, 2024 | Mar 31, 2024 | Sep 30, 2023 | Jun 30, 2023 | Mar 31, 2023 | Sep 30, 2022 | Jun 30, 2022 | Mar 31, 2022 | Sep 30, 2021 | Jun 30, 2021 | Mar 31, 2021 | Sep 30, 2020 | Jun 30, 2020 | Mar 31, 2020 | Sep 30, 2019 | Jun 30, 2019 | Mar 31, 2019 | Sep 30, 2018 | Jun 30, 2018 | Mar 31, 2018 | Sep 30, 2017 | Jun 30, 2017 | Mar 31, 2017 | Sep 30, 2016 | Jun 30, 2016 | Mar 31, 2016 | Sep 30, 2015 | Jun 30, 2015 | Mar 31, 2015 | Sep 30, 2014 | Jun 30, 2014 | Mar 31, 2014 | Sep 30, 2013 | Jun 30, 2013 | Mar 31, 2013 | Sep 30, 2012 | Jun 30, 2012 | Mar 31, 2012 | Sep 30, 2011 |
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Operating activities: | |||||||||||||||||||||||||||||||||||||||||||||
Consolidated net earnings | $ 1,123,954 | $ 1,044,815 | $ 821,260 | $ 622,304 | $ 639,520 | $ 1,063,451 | $ 911,501 | $ 630,807 | $ 799,141 | $ 1,279,491 | $ 498,629 | $ 1,069,174 | |||||||||||||||||||||||||||||||||
Consolidated net earnings | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||||||||||
Adjustments to reconcile net earnings to net cash provided by (used in) operating activities: | |||||||||||||||||||||||||||||||||||||||||||||
Straight-lined rents and amortization of above and below market leases | (161,152) | (165,749) | (162,529) | (187,801) | (180,361) | (166,980) | (144,349) | (158,960) | (173,887) | (149,113) | (143,686) | (34,899) | |||||||||||||||||||||||||||||||||
Straight-lined rents | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||||||||||
Equity-based compensation awards | 55,148 | 60,632 | 44,509 | 43,984 | 53,161 | 42,520 | 54,545 | 67,237 | 57,248 | 89,868 | 62,906 | 61,670 | |||||||||||||||||||||||||||||||||
Depreciation and amortization | 689,518 | 731,506 | 647,999 | 657,221 | 652,058 | 649,265 | 637,305 | 637,505 | 642,010 | 602,168 | 602,367 | 401,450 | |||||||||||||||||||||||||||||||||
Depreciation and amortization | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||||||||||
Earnings from unconsolidated entities, net | (147,470) | (93,296) | (92,827) | (107,692) | (67,899) | (84,749) | (102,337) | (72,472) | (71,365) | (70,642) | (75,779) | (84,925) | |||||||||||||||||||||||||||||||||
Earnings from unconsolidated entities, net | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||||||||||
Earnings from unconsolidated investees, net | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||||||||||
Operating distributions from unconsolidated entities | 142,154 | 186,153 | 162,366 | 153,369 | 138,947 | 161,496 | 129,147 | 126,653 | 300,448 | 100,575 | 135,081 | 124,089 | |||||||||||||||||||||||||||||||||
Decrease (increase) in operating receivables from unconsolidated entities | (72,608) | 31,009 | 3,380 | (11,852) | 16,638 | 15,535 | (22,607) | 44,841 | 526,984 | (676,375) | 51,164 | (445,637) | |||||||||||||||||||||||||||||||||
Amortization of debt discounts and debt issuance costs, net | 21,227 | 20,632 | 21,693 | 21,922 | 20,835 | 20,334 | 20,068 | 18,044 | 19,771 | 18,132 | 17,623 | 2,600 | |||||||||||||||||||||||||||||||||
Gains on dispositions of development properties and land, net | (79,196) | (292,983) | (15,435) | (10,477) | (27,451) | (32,005) | (87,174) | (40,308) | (89,030) | (184,877) | 0 | (74,678) | |||||||||||||||||||||||||||||||||
Gains on other dispositions of investments in real estate, net | (212,449) | (91,040) | (32,235) | (47,044) | (36,799) | (434,446) | (199,326) | (17,534) | (129,584) | (24,761) | (4,047) | (1,019) | |||||||||||||||||||||||||||||||||
Gains on real estate transactions, net | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||||||||||
Non-cash Merger, acquisition and other integration expenses | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||||||||||
Impairment of real estate properties and other assets | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||||||||||
Net losses (gains) on dispositions, including related impairment charges, in discontinued operations | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||||||||||
Net gains on dispositions, net of related impairment charges, included in discontinued operations | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||||||||||
Gains on dispositions of investments in real estate and revaluation of equity investments upon acquisition of a controlling interest, net | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||||||||||
Unrealized foreign currency and derivative losses (gains), net | (5,699) | (14,308) | (37,985) | 137,868 | 55,465 | 99,133 | (2,899) | (35,046) | (34,029) | 1,910 | 10,113 | (84,680) | |||||||||||||||||||||||||||||||||
Gains on acquisitions and dispositions of investment in real estate, net | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||||||||||
Gains recognized on property acquisitions and dispositions, net | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||||||||||
Losses (gains) on early extinguishment of debt, net | 31 | 1,890 | 0 | 0 | 0 | 0 | 0 | (536) | 0 | 0 | (3,275) | 0 | |||||||||||||||||||||||||||||||||
Losses (gains) on early extinguishment of debt, net | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||||||||||
Deferred income tax expense (benefit) | 18,854 | 190 | (5,312) | (4,318) | 6,682 | (8,304) | 10,171 | 334 | 4,541 | 1,718 | 3,577 | 6,157 | |||||||||||||||||||||||||||||||||
Decrease (increase) in other assets | (212,479) | 61,380 | (87,258) | (63,246) | 22,982 | (156,649) | (41,470) | (11,782) | (56,194) | 100,733 | 21,742 | - | |||||||||||||||||||||||||||||||||
Deferred income tax expense | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||||||||||
Decrease (increase) in accounts receivable and other assets | - | - | - | - | - | - | - | - | - | - | - | 43,474 | |||||||||||||||||||||||||||||||||
Increase (decrease) in accounts payable and accrued expenses and other liabilities | 187,042 | (192,695) | 180,102 | 37,479 | (133,025) | 266,244 | (76,122) | (133,323) | 173,147 | 126,311 | (62,118) | 220,560 | |||||||||||||||||||||||||||||||||
Net cash provided by (used in) operating activities | 1,346,875 | 1,288,136 | 1,447,728 | 1,241,717 | 1,160,753 | 1,434,845 | 1,086,453 | 1,055,460 | 1,969,201 | 1,215,138 | 1,114,297 | 1,203,336 | |||||||||||||||||||||||||||||||||
Investing activities: | |||||||||||||||||||||||||||||||||||||||||||||
Real estate development | (799,739) | (764,465) | (627,446) | (555,084) | (776,184) | (821,738) | (835,357) | (719,795) | (796,032) | (774,711) | (936,921) | (769,811) | |||||||||||||||||||||||||||||||||
Real estate development | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||||||||||
Real estate acquisitions | (950,317) | (223,053) | (92,751) | (374,002) | (779,664) | (1,294,748) | (399,383) | (126,177) | (199,837) | (3,397,217) | (51,866) | (362,928) | |||||||||||||||||||||||||||||||||
Duke Transaction, net of cash acquired | - | - | - | - | - | - | - | - | (5,979) | (18,304) | (3,828) | - | |||||||||||||||||||||||||||||||||
Tenant improvements and lease commissions on previously leased space | (133,959) | (123,816) | (138,212) | (152,242) | (123,123) | (131,782) | (111,400) | (104,306) | (102,957) | (89,099) | (78,955) | (86,697) | |||||||||||||||||||||||||||||||||
Property improvements | (71,218) | (26,065) | (109,397) | (68,772) | (34,367) | (122,556) | (96,112) | (30,200) | (82,720) | (54,498) | (19,302) | (61,747) | |||||||||||||||||||||||||||||||||
Property improvements | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||||||||||
Proceeds from dispositions and contributions of real estate | 764,428 | 624,036 | 84,549 | 99,382 | 157,013 | 738,426 | 850,960 | 199,538 | 535,817 | 719,722 | 54,903 | 68,396 | |||||||||||||||||||||||||||||||||
Investments in and advances to unconsolidated entities | (90,505) | (150,663) | (18,057) | (5,248) | (27,352) | (115,392) | (49,663) | (314,842) | (73,292) | (133,166) | (39,677) | (79,487) | |||||||||||||||||||||||||||||||||
Acquisition of a controlling interest in an unconsolidated venture, net of cash received | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||||||||||
Return of investment from unconsolidated entities | 130,745 | 86,616 | 17,126 | 30,716 | 28,314 | 36,673 | 16,034 | 1,360 | 16,400 | 267,332 | 21,169 | 21,276 | |||||||||||||||||||||||||||||||||
Proceeds from repayment of notes receivable backed by real estate | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||||||||||
Proceeds from the settlement of net investment hedges | 3,342 | 310 | - | - | 4,852 | - | 2,440 | 10,357 | 9,814 | 15,908 | 5,323 | 18,546 | |||||||||||||||||||||||||||||||||
Payments on the settlement of net investment hedges | (5,332) | - | (9,188) | (9,720) | - | - | (1,350) | - | (161) | - | 0 | - | |||||||||||||||||||||||||||||||||
Proceeds from maturity of short-term investments | - | 176,485 | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||||||||||
Purchase of short-term investments | - | - | (176,715) | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||||||||||
Net advances from (investments in and net advances to) unconsolidated entities | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||||||||||
Return of investment from unconsolidated entities | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||||||||||
Acquisition of NAIF II, net of cash received | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||||||||||
Acquisition of NAIF II, net of cash received | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||||||||||
Net cash provided by (used in) investing activities | (1,152,555) | (400,615) | (1,070,091) | (1,034,970) | (1,550,511) | (1,711,117) | (623,831) | (1,084,065) | (698,947) | (3,464,033) | (1,049,154) | (1,252,452) | |||||||||||||||||||||||||||||||||
Financing activities: | |||||||||||||||||||||||||||||||||||||||||||||
Proceeds from issuance of common stock/units | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||||||||||
Repurchase and retirement of common stock | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||||||||||
Repurchase of preferred stock | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||||||||||
Dividends/distributions paid on common and preferred units | (1,001,661) | (1,000,577) | (941,264) | (941,588) | (939,920) | (892,862) | (892,809) | (891,806) | (806,287) | (807,230) | (806,505) | (587,645) | |||||||||||||||||||||||||||||||||
Noncontrolling interests contributions | 7,731 | 12,768 | 32,743 | 13,239 | 13,234 | 15,214 | 4,761 | 1,270 | 62 | 1,698 | 0 | 838 | |||||||||||||||||||||||||||||||||
Noncontrolling interests distributions | (72,227) | (80,168) | (82,193) | (73,513) | (75,045) | (65,990) | (91,450) | (70,363) | (59,942) | (59,460) | (58,653) | (53,681) | |||||||||||||||||||||||||||||||||
Dividends paid on common stock | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||||||||||
Dividends paid on preferred stock | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||||||||||
Noncontrolling interest contributions | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||||||||||
Noncontrolling interest distributions | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||||||||||
Settlement of noncontrolling interests | (25,655) | (47,952) | (2,027) | (13,944) | (4,003) | - | (253) | (246) | (3,290) | (24,200) | (42,269) | (2,517) | |||||||||||||||||||||||||||||||||
Tax paid with shares of the Parent withheld | (2,456) | (18,321) | (3,342) | 1 | (15,416) | (4,968) | (205) | (21,720) | (1,337) | 213 | (18,690) | (1,457) | |||||||||||||||||||||||||||||||||
Purchase of noncontrolling interest | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||||||||||
Debt and equity issuance costs paid | (12,759) | (17,153) | (5,366) | (22,692) | (2,648) | (9,224) | (6,668) | (13,073) | (6,701) | (33,751) | (17,868) | (3,793) | |||||||||||||||||||||||||||||||||
Net proceeds from (payments on) credit facilities and commercial paper | (35,581) | 517,779 | (290,537) | (36,624) | 299,224 | (334,164) | - | - | - | - | - | - | |||||||||||||||||||||||||||||||||
Net payments on credit facilities and commercial paper | - | - | - | - | - | - | (472,181) | - | - | - | - | - | |||||||||||||||||||||||||||||||||
Net proceeds from (payments on) credit facilities | - | - | - | - | - | - | - | 53,964 | (410,151) | 419,872 | (1,337,857) | (67,097) | |||||||||||||||||||||||||||||||||
Repurchase of and payments on debt | (300,202) | (686,276) | (136,671) | (1,192) | (71,205) | (1,929) | (1,696) | (913,935) | (1,768) | (177,783) | (90,793) | (135,632) | |||||||||||||||||||||||||||||||||
Proceeds from the issuance of debt | 2,151,143 | 161,620 | 1,176,932 | 1,258,261 | 520,219 | 1,266,806 | 1,158,665 | 1,858,297 | 241,755 | 2,960,180 | 2,545,042 | 1,109,332 | |||||||||||||||||||||||||||||||||
Net proceeds from credit facilities | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||||||||||
Payments on credit facilities, net | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||||||||||
Repurchase of and payments on debt | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||||||||||
Repurchase and early extinguishment of debt | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||||||||||
Proceeds from (payments on) credit facilities, net | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||||||||||
Proceeds from the issuance of debt | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||||||||||
Payments on debt | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||||||||||
Net cash provided by (used in) financing activities | 708,333 | (1,158,280) | (251,725) | 181,948 | (275,560) | 445,064 | (355,800) | 2,388 | (1,047,659) | 2,279,539 | 172,407 | 258,348 | |||||||||||||||||||||||||||||||||
Effect of foreign currency exchange rate changes on cash | 1,246 | (13,744) | (5,971) | 6,269 | 17,844 | 13,732 | (9,064) | (3,582) | (12,864) | (22,035) | 6,468 | (10,465) | |||||||||||||||||||||||||||||||||
Net increase (decrease) in cash and cash equivalents | $ 903,899 | $ (284,503) | $ 119,941 | $ 394,964 | $ (647,474) | $ 182,524 | $ 97,758 | $ (29,799) | $ 209,731 | $ 8,609 | $ 244,018 | $ 198,767 |