Consolidated Balance Sheets - USD ($) $ in Thousands		Dec. 31, 2023	Dec. 31, 2022
ASSETS
Real estate, at cost (amounts related to variable interest entities (“VIEs”) of $7,054,075 and $6,789,029 at December 31, 2023 and December 31, 2022, respectively)		$ 26,749,209	$ 25,389,663
Right of use assets - finance leases (amounts related to VIEs of $21,000 and $21,000 at December 31, 2023 and December 31, 2022, respectively)		401,680	237,510
Right of use assets - operating leases (amounts related to VIEs of $158,885 and $0 at December 31, 2023 and December 31, 2022, respectively)	[1]	324,298	167,351
Less: accumulated depreciation (amounts related to VIEs of $(1,501,483) and $(1,381,401) at December 31, 2023 and December 31, 2022, respectively)		(6,881,728)	(6,298,082)
Total real estate		20,593,459	19,496,442
Cash and cash equivalents (amounts related to VIEs of $245,317 and $259,658 at December 31, 2023 and December 31, 2022, respectively)		1,531,477	690,333
Cash held in escrows (amounts related to VIEs of $22,160 and $0 at December 31, 2023 and December 31, 2022, respectively)		81,090	46,479
Investments in securities		36,337	32,277
Tenant and other receivables, net (amounts related to VIEs of $27,987 and $16,521 at December 31, 2023 and December 31, 2022, respectively)		122,407	81,389
Note receivable, net		1,714	0
Sales-type lease receivable, net		13,704	12,811
Accrued rental income, net (amounts related to VIEs of $401,159 and $367,138 at December 31, 2023 and December 31, 2022, respectively)		1,355,212	1,276,580
Deferred charges, net (amounts related to VIEs of $175,383 and $176,597 at December 31, 2023 and December 31, 2022, respectively)		760,421	733,282
Prepaid expenses and other assets (amounts related to VIEs of $11,824 and $11,647 at December 31, 2023 and December 31, 2022, respectively)		64,230	43,589
Investments in unconsolidated joint ventures		1,377,319	1,715,911
Total assets		26,026,149	24,207,669
Liabilities:
Mortgage notes payable, net (amounts related to VIEs of $3,277,185 and $3,272,368 at December 31, 2023 and December 31, 2022, respectively)		4,166,379	3,272,368
Unsecured senior notes, net		10,491,617	10,237,968
Unsecured line of credit		0	0
Unsecured term loan, net		1,198,301	730,000
Lease liabilities - finance leases (amounts related to VIEs of $20,794 and $20,604 at December 31, 2023 and December 31, 2022, respectively)		417,961	249,335
Lease liabilities - operating leases (amounts related to VIEs of $145,826 and $0 at December 31, 2023 and December 31, 2022, respectively)		350,391	204,686
Accounts payable and accrued expenses (amounts related to VIEs of $59,667 and $29,466 at December 31, 2023 and December 31, 2022, respectively)		458,329	417,545
Dividends and distributions payable		171,176	170,643
Accrued interest payable		133,684	103,774
Other liabilities (amounts related to VIEs of $115,275 and $114,232 at December 31, 2023 and December 31, 2022, respectively)		445,947	450,918
Total liabilities		17,833,785	15,837,237
Redeemable deferred stock units— 119,471 and 97,853 units outstanding at redemption value at December 31, 2023 and December 31, 2022, respectively		$ 8,383	$ 6,613
Excess stock, shares outstanding		0	0
Excess stock, shares issued		0	0
Preferred stock / units, shares / units issued (in shares / units)		0	0
Preferred stock / units, shares / units outstanding (in shares / units)		0	0
Equity / Capital:
Excess stock, $0.01 par value, 150,000,000 shares authorized, none issued or outstanding		$ 0	$ 0
Preferred stock, $0.01 par value, 50,000,000 shares authorized, none issued or outstanding		0	0
Common stock, $0.01 par value, 250,000,000 shares authorized, 157,019,766 and 156,836,767 issued and 156,940,866 and 156,757,867 outstanding at December 31, 2023 and December 31, 2022, respectively		1,569	1,568
Additional paid-in capital		6,715,149	6,539,147
Dividends in excess of earnings		$ (816,152)	$ (391,356)
Treasury common stock at cost, shares		78,900	78,900
Treasury common stock at cost, 78,900 shares at December 31, 2023 and December 31, 2022		$ (2,722)	$ (2,722)
Accumulated other comprehensive loss		(21,147)	(13,718)
Total stockholders' equity attributable to Boston Properties, Inc.		5,876,697	6,132,919
Noncontrolling interests:
Common units of the Operating Partnership		666,580	683,583
Property partnerships		1,640,704	1,547,317
Total equity / capital		8,183,981	8,363,819
Total liabilities and equity / capital		26,026,149	24,207,669
Related Party
ASSETS
Related party note receivable, net		88,779	78,576
Variable Interest Entity, Primary Beneficiary [Member]
ASSETS
Real estate, at cost (amounts related to variable interest entities (“VIEs”) of $7,054,075 and $6,789,029 at December 31, 2023 and December 31, 2022, respectively)		7,054,075	6,789,029
Right of use assets - finance leases (amounts related to VIEs of $21,000 and $21,000 at December 31, 2023 and December 31, 2022, respectively)		21,000	21,000
Right of use assets - operating leases (amounts related to VIEs of $158,885 and $0 at December 31, 2023 and December 31, 2022, respectively)		158,885	0
Less: accumulated depreciation (amounts related to VIEs of $(1,501,483) and $(1,381,401) at December 31, 2023 and December 31, 2022, respectively)		(1,501,483)	(1,381,401)
Cash and cash equivalents (amounts related to VIEs of $245,317 and $259,658 at December 31, 2023 and December 31, 2022, respectively)		245,317	259,658
Cash held in escrows (amounts related to VIEs of $22,160 and $0 at December 31, 2023 and December 31, 2022, respectively)		22,160	0
Tenant and other receivables, net (amounts related to VIEs of $27,987 and $16,521 at December 31, 2023 and December 31, 2022, respectively)		27,987	16,521
Accrued rental income, net (amounts related to VIEs of $401,159 and $367,138 at December 31, 2023 and December 31, 2022, respectively)		401,159	367,138
Deferred charges, net (amounts related to VIEs of $175,383 and $176,597 at December 31, 2023 and December 31, 2022, respectively)		175,383	176,597
Prepaid expenses and other assets (amounts related to VIEs of $11,824 and $11,647 at December 31, 2023 and December 31, 2022, respectively)		11,824	11,647
Liabilities:
Mortgage notes payable, net (amounts related to VIEs of $3,277,185 and $3,272,368 at December 31, 2023 and December 31, 2022, respectively)		3,277,185	3,272,368
Lease liabilities - finance leases (amounts related to VIEs of $20,794 and $20,604 at December 31, 2023 and December 31, 2022, respectively)		20,794	20,604
Lease liabilities - operating leases (amounts related to VIEs of $145,826 and $0 at December 31, 2023 and December 31, 2022, respectively)		145,826	0
Accounts payable and accrued expenses (amounts related to VIEs of $59,667 and $29,466 at December 31, 2023 and December 31, 2022, respectively)		59,667	29,466
Other liabilities (amounts related to VIEs of $115,275 and $114,232 at December 31, 2023 and December 31, 2022, respectively)		115,275	114,232
Boston Properties Limited Partnership
ASSETS
Real estate, at cost (amounts related to variable interest entities (“VIEs”) of $7,054,075 and $6,789,029 at December 31, 2023 and December 31, 2022, respectively)		26,382,944	25,022,149
Right of use assets - finance leases (amounts related to VIEs of $21,000 and $21,000 at December 31, 2023 and December 31, 2022, respectively)		401,680	237,510
Right of use assets - operating leases (amounts related to VIEs of $158,885 and $0 at December 31, 2023 and December 31, 2022, respectively)	[1]	324,298	167,351
Less: accumulated depreciation (amounts related to VIEs of $(1,501,483) and $(1,381,401) at December 31, 2023 and December 31, 2022, respectively)		(6,758,361)	(6,180,474)
Total real estate		20,350,561	19,246,536
Cash and cash equivalents (amounts related to VIEs of $245,317 and $259,658 at December 31, 2023 and December 31, 2022, respectively)		1,531,477	690,333
Cash held in escrows (amounts related to VIEs of $22,160 and $0 at December 31, 2023 and December 31, 2022, respectively)		81,090	46,479
Investments in securities		36,337	32,277
Tenant and other receivables, net (amounts related to VIEs of $27,987 and $16,521 at December 31, 2023 and December 31, 2022, respectively)		122,407	81,389
Note receivable, net		1,714	0
Sales-type lease receivable, net		13,704	12,811
Accrued rental income, net (amounts related to VIEs of $401,159 and $367,138 at December 31, 2023 and December 31, 2022, respectively)		1,355,212	1,276,580
Deferred charges, net (amounts related to VIEs of $175,383 and $176,597 at December 31, 2023 and December 31, 2022, respectively)		760,421	733,282
Prepaid expenses and other assets (amounts related to VIEs of $11,824 and $11,647 at December 31, 2023 and December 31, 2022, respectively)		64,230	43,589
Investments in unconsolidated joint ventures		1,377,319	1,715,911
Total assets		25,783,251	23,957,763
Liabilities:
Mortgage notes payable, net (amounts related to VIEs of $3,277,185 and $3,272,368 at December 31, 2023 and December 31, 2022, respectively)		4,166,379	3,272,368
Unsecured senior notes, net		10,491,617	10,237,968
Unsecured line of credit		0	0
Unsecured term loan, net		1,198,301	730,000
Lease liabilities - finance leases (amounts related to VIEs of $20,794 and $20,604 at December 31, 2023 and December 31, 2022, respectively)		417,961	249,335
Lease liabilities - operating leases (amounts related to VIEs of $145,826 and $0 at December 31, 2023 and December 31, 2022, respectively)		350,391	204,686
Accounts payable and accrued expenses (amounts related to VIEs of $59,667 and $29,466 at December 31, 2023 and December 31, 2022, respectively)		458,329	417,545
Dividends and distributions payable		171,176	170,643
Accrued interest payable		133,684	103,774
Other liabilities (amounts related to VIEs of $115,275 and $114,232 at December 31, 2023 and December 31, 2022, respectively)		445,947	450,918
Total liabilities		17,833,785	15,837,237
Redeemable deferred stock units— 119,471 and 97,853 units outstanding at redemption value at December 31, 2023 and December 31, 2022, respectively		8,383	6,613
Noncontrolling interest:
Redeemable partnership units— 16,508,277 and 16,531,172 common units and 2,065,861 and 1,679,175 long term incentive units outstanding at redemption value at December 31, 2023 and December 31, 2022, respectively		1,347,575	1,280,886
Equity / Capital:
Boston Properties Limited Partnership partners’ capital— 1,755,150 and 1,749,682 general partner units and 155,185,716 and 155,008,185 limited partner units outstanding at December 31, 2023 and December 31, 2022, respectively		4,973,951	5,299,428
Accumulated other comprehensive loss		(21,147)	(13,718)
Total partners’ capital		4,952,804	5,285,710
Noncontrolling interests in property partnerships		1,640,704	1,547,317
Noncontrolling interests:
Total equity / capital		6,593,508	6,833,027
Total liabilities and equity / capital		25,783,251	23,957,763
Boston Properties Limited Partnership | Related Party
ASSETS
Related party note receivable, net		88,779	78,576
Boston Properties Limited Partnership | Variable Interest Entity, Primary Beneficiary [Member]
ASSETS
Real estate, at cost (amounts related to variable interest entities (“VIEs”) of $7,054,075 and $6,789,029 at December 31, 2023 and December 31, 2022, respectively)		7,054,075	6,789,029
Right of use assets - finance leases (amounts related to VIEs of $21,000 and $21,000 at December 31, 2023 and December 31, 2022, respectively)		21,000	21,000
Right of use assets - operating leases (amounts related to VIEs of $158,885 and $0 at December 31, 2023 and December 31, 2022, respectively)		158,885	0
Less: accumulated depreciation (amounts related to VIEs of $(1,501,483) and $(1,381,401) at December 31, 2023 and December 31, 2022, respectively)		(1,501,483)	(1,381,401)
Cash and cash equivalents (amounts related to VIEs of $245,317 and $259,658 at December 31, 2023 and December 31, 2022, respectively)		245,317	259,658
Cash held in escrows (amounts related to VIEs of $22,160 and $0 at December 31, 2023 and December 31, 2022, respectively)		22,160	0
Tenant and other receivables, net (amounts related to VIEs of $27,987 and $16,521 at December 31, 2023 and December 31, 2022, respectively)		27,987	16,521
Accrued rental income, net (amounts related to VIEs of $401,159 and $367,138 at December 31, 2023 and December 31, 2022, respectively)		401,159	367,138
Deferred charges, net (amounts related to VIEs of $175,383 and $176,597 at December 31, 2023 and December 31, 2022, respectively)		175,383	176,597
Prepaid expenses and other assets (amounts related to VIEs of $11,824 and $11,647 at December 31, 2023 and December 31, 2022, respectively)		11,824	11,647
Liabilities:
Mortgage notes payable, net (amounts related to VIEs of $3,277,185 and $3,272,368 at December 31, 2023 and December 31, 2022, respectively)		3,277,185	3,272,368
Lease liabilities - finance leases (amounts related to VIEs of $20,794 and $20,604 at December 31, 2023 and December 31, 2022, respectively)		20,794	20,604
Lease liabilities - operating leases (amounts related to VIEs of $145,826 and $0 at December 31, 2023 and December 31, 2022, respectively)		145,826	0
Accounts payable and accrued expenses (amounts related to VIEs of $59,667 and $29,466 at December 31, 2023 and December 31, 2022, respectively)		59,667	29,466
Other liabilities (amounts related to VIEs of $115,275 and $114,232 at December 31, 2023 and December 31, 2022, respectively)		$ 115,275	$ 114,232

[1] See Note 4.