Investments in Unconsolidated Joint Ventures - Mortgages and Other Loans Payable (Details)	9 Months Ended
	Sep. 30, 2023 USD ($) extension	Dec. 31, 2022 USD ($)
Debt Instrument [Line Items]
Total fixed rate debt	$ 1,398,724,000	$ 3,115,814,000
Total floating rate debt	120,148,000	120,148,000
245 Park Avenue
Debt Instrument [Line Items]
Total fixed rate debt	0	1,712,750,000
Joint venture
Debt Instrument [Line Items]
Total fixed rate debt	11,911,148,000	10,855,657,000
Total floating rate debt	2,908,953,000	1,629,980,000
Total fixed rate and floating rate debt	14,820,101,000	12,485,637,000
Deferred financing costs, net	(112,175,000)	(136,683,000)
Total joint venture mortgages and other loans payable, net	$ 14,707,926,000	12,348,954,000
Joint venture | Wharton Properties / Private Investor | 717 Fifth Avenue
Debt Instrument [Line Items]
Economic Interest	10.92%
Interest rate, fixed rate debt (as a percent)	5.02%
Total fixed rate debt	$ 655,328,000	655,328,000
Joint venture | Vornado Realty Trust | 280 Park Avenue
Debt Instrument [Line Items]
Economic Interest	50.00%
Interest rate, floating rate debt (as a percent)	2.03%
Total fixed rate debt		1,200,000,000
Total floating rate debt	$ 1,200,000,000	0
Joint venture | Wharton Properties | 650 Fifth Avenue
Debt Instrument [Line Items]
Economic Interest	50.00%
Interest rate, fixed rate debt (as a percent)	5.45%
Interest rate, floating rate debt (as a percent)	2.25%
Total fixed rate debt	$ 65,000,000	65,000,000
Total floating rate debt	$ 210,000,000	210,000,000
Joint venture | Wharton Properties | 1552-1560 Broadway
Debt Instrument [Line Items]
Economic Interest	50.00%
Interest rate, floating rate debt (as a percent)	2.75%
Total floating rate debt	$ 193,132,000	193,132,000
Joint venture | A Fund Managed By Meritz Alternative Investment Management | 220 East 42nd Street
Debt Instrument [Line Items]
Economic Interest	51.00%
Interest rate, fixed rate debt (as a percent)	5.86%
Total fixed rate debt	$ 505,412,000	510,000,000
Joint venture | A Fund Managed By Meritz Alternative Investment Management | 15 Beekman
Debt Instrument [Line Items]
Economic Interest	20.00%
Interest rate, floating rate debt (as a percent)	1.61%
Total floating rate debt	$ 123,168,000	86,738,000
Joint venture | RXR Realty Led Investment Group | 5 Times Square
Debt Instrument [Line Items]
Economic Interest	31.55%
Interest rate, fixed rate debt (as a percent)	7.07%
Interest rate, floating rate debt (as a percent)	5.69%
Total fixed rate debt	$ 434,816,000	400,000,000
Total floating rate debt	$ 604,598,000	495,924,000
Joint venture | Canadian Pension Plan Investment Board | 10 East 53rd Street
Debt Instrument [Line Items]
Economic Interest	55.00%
Interest rate, fixed rate debt (as a percent)	5.45%
Total fixed rate debt	$ 220,000,000	220,000,000
Joint venture | Allianz Real Estate of America | 1515 Broadway
Debt Instrument [Line Items]
Economic Interest	56.87%
Interest rate, fixed rate debt (as a percent)	3.93%
Total fixed rate debt	$ 767,179,000	782,321,000
Joint venture | Korean Institutional Investor / Israeli Institutional Investor | 450 Park Avenue
Debt Instrument [Line Items]
Economic Interest	25.10%
Interest rate, fixed rate debt (as a percent)	6.10%
Total fixed rate debt	$ 267,000,000	267,000,000
Joint venture | PGIM Real Estate | 11 Madison Avenue
Debt Instrument [Line Items]
Economic Interest	60.00%
Interest rate, fixed rate debt (as a percent)	3.84%
Total fixed rate debt	$ 1,400,000,000	1,400,000,000
Joint venture | National Pension Service of Korea / Hines Interest LP / International Investor | One Madison Avenue
Debt Instrument [Line Items]
Economic Interest	25.50%
Interest rate, fixed rate debt (as a percent)	3.59%
Total fixed rate debt	$ 662,663,000	467,008,000
Joint venture | Private Investors | 115 Spring Street
Debt Instrument [Line Items]
Economic Interest	51.00%
Interest rate, fixed rate debt (as a percent)	5.50%
Total fixed rate debt	$ 65,550,000	0
Joint venture | Private Investors | 800 Third Avenue
Debt Instrument [Line Items]
Economic Interest	60.52%
Interest rate, fixed rate debt (as a percent)	3.37%
Total fixed rate debt	$ 177,000,000	177,000,000
Joint venture | Private Investors | 21 East 66th Street
Debt Instrument [Line Items]
Economic Interest	32.28%
Joint venture | Private Investors | East 21 Street 66, 1
Debt Instrument [Line Items]
Interest rate, floating rate debt (as a percent)	1.75%
Total floating rate debt	$ 12,000,000	0
Joint venture | Private Investors | East 21 Street 66, 2
Debt Instrument [Line Items]
Economic Interest	32.28%
Interest rate, floating rate debt (as a percent)	2.75%
Total floating rate debt	$ 555,000	586,000
Joint venture | New York State Teacher's Retirement System | 919 Third Avenue
Debt Instrument [Line Items]
Economic Interest	51.00%
Interest rate, fixed rate debt (as a percent)	6.11%
Joint venture | Mori Trust Co., Ltd | 245 Park Avenue
Debt Instrument [Line Items]
Economic Interest	50.10%
Interest rate, fixed rate debt (as a percent)	4.30%
Total fixed rate debt	$ 1,768,000,000	0
Joint venture | RXR Realty / New York REIT | Worldwide Plaza
Debt Instrument [Line Items]
Economic Interest	24.95%
Interest rate, fixed rate debt (as a percent)	3.98%
Total fixed rate debt	$ 1,200,000,000	1,200,000,000
Joint venture | National Pension Service of Korea / Hines Interest LP | One Vanderbilt Avenue
Debt Instrument [Line Items]
Economic Interest	71.01%
Interest rate, fixed rate debt (as a percent)	2.95%
Total fixed rate debt	$ 3,000,000,000	3,000,000,000
Joint venture | Private Investor / Wharton Properties | 115 Spring Street
Debt Instrument [Line Items]
Total floating rate debt	$ 0	65,550,000
Joint venture | Private Investor / Wharton Properties | 11 West 34th Street
Debt Instrument [Line Items]
Economic Interest	30.00%
Interest rate, floating rate debt (as a percent)	1.45%
Total floating rate debt	$ 23,000,000	23,000,000
Joint venture | Private Investor / Wharton Properties | 121 Greene Street
Debt Instrument [Line Items]
Total floating rate debt	$ 0	12,550,000
Joint venture | Israeli Institutional Investor | 2 Herald Square
Debt Instrument [Line Items]
Economic Interest	51.00%
Interest rate, floating rate debt (as a percent)	2.06%
Total floating rate debt	$ 182,500,000	182,500,000
Joint venture | Prudential Real Estate Investors | 100 Park Avenue
Debt Instrument [Line Items]
Economic Interest	49.90%
Interest rate, floating rate debt (as a percent)	2.36%
Total floating rate debt	$ 360,000,000	360,000,000
Joint venture | Winthrop Capital Advisors | 625 Madison Avenue
Debt Instrument [Line Items]
Interest rate, fixed rate debt (as a percent)	6.05%
Total fixed rate debt	$ 223,200,000	0
Joint venture | Mortgage loan | Wharton Properties | 21 East 66th Street
Debt Instrument [Line Items]
Total fixed rate debt	0	12,000,000
Joint venture | Mortgage loan | New York State Teacher's Retirement System | 919 Third Avenue
Debt Instrument [Line Items]
Total fixed rate debt	500,000,000	$ 500,000,000
Joint venture | Construction Loans | One Madison Avenue
Debt Instrument [Line Items]
Maximum facility capacity	$ 1,250,000,000
Term	5 years
Number of extension options | extension	1
Period of extension options	1 year
Joint venture | Construction Loans | 15 Beekman
Debt Instrument [Line Items]
Maximum facility capacity	$ 125,000,000