$BXP
BXP, Inc. Stock $bxp

$bxp Overview Financials Valuation SEC Filings Company Website

2020 Q4 Form 10-Q Financial Statement

#000165642320000046 Filed on November 06, 2020

Income Statement

Concept	2020 Q4	2020 Q3	2019 Q3
Revenue	$665.1M	$693.3M	$743.6M
YoY Change	-12.2%	-6.76%	8.34%
Cost Of Revenue	$260.4M	$264.3M	$276.8M
YoY Change	-6.8%	-4.52%	6.75%
Gross Profit	$404.7M	$421.7M	$456.5M
YoY Change	-15.35%	-7.63%	10.88%
Gross Profit Margin	60.85%	60.82%	61.39%
Selling, General & Admin	$31.10M	$27.90M	$31.10M
YoY Change	-5.18%	-10.29%	4.71%
% of Gross Profit	7.68%	6.62%	6.81%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$168.1M	$166.4M	$165.9M
YoY Change	-1.06%	0.3%	5.0%
% of Gross Profit	41.54%	39.46%	36.34%
Operating Expenses	$199.0M	$194.3M	$197.0M
YoY Change	-1.83%	-1.37%	4.95%
Operating Profit	$205.7M	$227.4M	$259.5M
YoY Change	-25.31%	-12.37%	8.86%
Interest Expense	-$185.7M	$111.0M	$106.5M
YoY Change	91.05%	4.25%	11.64%
% of Operating Profit	-90.28%	48.82%	41.03%
Other Income/Expense, Net
YoY Change
Pretax Income	$24.90M	$118.1M	$141.4M
YoY Change	-85.85%	-16.48%	-5.98%
Income Tax
% Of Pretax Income
Net Earnings	$10.30M	$92.48M	$110.4M
YoY Change	-92.69%	-16.23%	-7.32%
Net Earnings / Revenue	1.55%	13.34%	14.85%
Basic Earnings Per Share		$0.58	$0.70
Diluted Earnings Per Share	$66.15K	$0.58	$0.70
COMMON SHARES
Basic Shares Outstanding	155.7M shares	155.6M shares	154.6M shares
Diluted Shares Outstanding		155.7M shares	154.8M shares

Balance Sheet

Concept	2020 Q4	2020 Q3	2019 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$1.708B	$1.750B	$785.6M
YoY Change	150.58%	122.73%	121.99%
Cash & Equivalents	$1.669B	$1.715B	$751.2M
Short-Term Investments	$39.46M	$34.93M	$34.38M
Other Short-Term Assets	$34.00M	$107.0M	$110.0M
YoY Change	-19.05%	-2.73%	-17.29%
Inventory
Prepaid Expenses
Receivables	$77.00M	$76.00M	$102.0M
Other Receivables	$1.123B	$1.111B	$1.003B
Total Short-Term Assets	$2.903B	$3.009B	$1.966B
YoY Change	57.86%	53.05%	32.75%
LONG-TERM ASSETS
Property, Plant & Equipment	$17.82B	$17.74B	$17.51B
YoY Change	1.12%	1.31%	3.93%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments	$1.350B	$1.412B	$968.0M
YoY Change	36.09%	45.87%	1.15%
Other Assets	$691.0M	$694.0M	$743.0M
YoY Change	-6.11%	-6.59%	-3.63%
Total Long-Term Assets	$19.96B	$19.95B	$19.32B
YoY Change	2.62%	3.25%	3.57%
TOTAL ASSETS
Total Short-Term Assets	$2.903B	$3.009B	$1.966B
Total Long-Term Assets	$19.96B	$19.95B	$19.32B
Total Assets	$22.86B	$22.96B	$21.29B
YoY Change	7.39%	7.85%	5.72%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$336.0M	$346.0M	$421.0M
YoY Change	-11.11%	-17.81%	33.65%
Accrued Expenses	$308.0M	$290.0M	$283.0M
YoY Change	6.21%	2.47%	204.3%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$815.0M	$807.0M	$869.0M
YoY Change	-2.86%	-7.13%	51.66%
LONG-TERM LIABILITIES
Long-Term Debt	$13.28B	$13.28B	$12.06B
YoY Change	10.37%	10.12%	10.74%
Other Long-Term Liabilities	$419.0M	$376.0M	$363.0M
YoY Change	5.81%	3.58%	-22.44%
Total Long-Term Liabilities	$13.70B	$13.66B	$12.42B
YoY Change	10.22%	9.93%	9.38%
TOTAL LIABILITIES
Total Short-Term Liabilities	$815.0M	$807.0M	$869.0M
Total Long-Term Liabilities	$13.70B	$13.66B	$12.42B
Total Liabilities	$14.51B	$14.46B	$13.29B
YoY Change	9.42%	8.83%	11.35%
SHAREHOLDERS EQUITY
Retained Earnings	-$509.7M	-$364.7M	-$749.7M
YoY Change	-32.99%	-51.35%	10.68%
Common Stock	$1.557M	$1.556M	$1.546M
YoY Change	0.58%	0.65%	0.13%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$2.722M	$2.722M	$2.722M
YoY Change	0.0%	0.0%	0.0%
Treasury Stock Shares	78.90K shares	78.90K shares	78.90K shares
Shareholders Equity	$5.996B	$6.130B	$5.672B
YoY Change
Total Liabilities & Shareholders Equity	$22.86B	$22.96B	$21.29B
YoY Change	7.39%	7.85%	5.72%

Cashflow Statement

Concept	2020 Q4	2020 Q3	2019 Q3
OPERATING ACTIVITIES
Net Income	$10.30M	$92.48M	$110.4M
YoY Change	-92.69%	-16.23%	-7.32%
Depreciation, Depletion And Amortization	$168.1M	$166.4M	$165.9M
YoY Change	-1.06%	0.3%	5.0%
Cash From Operating Activities	$374.4M	$228.1M	$254.2M
YoY Change	3.6%	-10.27%	21.16%
INVESTING ACTIVITIES
Capital Expenditures	-$231.2M	-$215.5M	-$417.9M
YoY Change	-13.54%	-48.43%	74.49%
Acquisitions
YoY Change
Other Investing Activities	$5.900M	-$52.40M	$9.300M
YoY Change	-152.68%	-663.44%	-103.15%
Cash From Investing Activities	-$225.3M	-$267.9M	-$408.5M
YoY Change	-19.13%	-34.42%	-23.54%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-194.6M	-187.1M	-203.9M
YoY Change	-0.51%	-8.24%	-1057.28%
NET CHANGE
Cash From Operating Activities	374.4M	228.1M	254.2M
Cash From Investing Activities	-225.3M	-267.9M	-408.5M
Cash From Financing Activities	-194.6M	-187.1M	-203.9M
Net Change In Cash	-45.50M	-226.9M	-358.2M
YoY Change	-59.66%	-36.66%	18.14%
FREE CASH FLOW
Cash From Operating Activities	$374.4M	$228.1M	$254.2M
Capital Expenditures	-$231.2M	-$215.5M	-$417.9M
Free Cash Flow	$605.6M	$443.6M	$672.1M
YoY Change	-3.69%	-34.0%	49.59%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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CY2019Q4	us-gaap	Secured Debt SecuredDebt	2922408000	USD
	dei	Entity Registrant Name EntityRegistrantName	BOSTON PROPERTIES, INC.
	dei	Entity Central Index Key EntityCentralIndexKey	0001037540
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Document Type DocumentType	10-Q
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2020
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q3
	dei	Amendment Flag AmendmentFlag	false
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	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	35300000	USD
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	32400000	USD
	dei	Document Type DocumentType	10-Q
	dei	Document Quarterly Report DocumentQuarterlyReport	true
	dei	Document Period End Date DocumentPeriodEndDate	2020-09-30
	dei	Document Transition Report DocumentTransitionReport	false
	dei	Entity File Number EntityFileNumber	1-13087
	dei	Entity Registrant Name EntityRegistrantName	BOSTON PROPERTIES, INC.
	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	04-2473675
	dei	Entity Address Address Line1 EntityAddressAddressLine1	Prudential Center, 800 Boylston Street, Suite 1900
	dei	Entity Address City Or Town EntityAddressCityOrTown	Boston
	dei	Entity Address State Or Province EntityAddressStateOrProvince	MA
	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	02199-8103
	dei	City Area Code CityAreaCode	617
	dei	Local Phone Number LocalPhoneNumber	236-3300
	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
	dei	Entity Small Business EntitySmallBusiness	false
	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
	dei	Entity Shell Company EntityShellCompany	false
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CY2020Q3	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	17741337000	USD
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	us-gaap	Interest And Other Income InterestAndOtherIncome	14546000	USD
CY2020Q3	us-gaap	Gain Loss On Investments GainLossOnInvestments	1858000	USD
CY2019Q3	us-gaap	Gain Loss On Investments GainLossOnInvestments	106000	USD
	us-gaap	Gain Loss On Investments GainLossOnInvestments	965000	USD
	us-gaap	Gain Loss On Investments GainLossOnInvestments	4240000	USD
CY2020Q3	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	0	USD
CY2019Q3	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	0	USD
	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	0	USD
	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	24038000	USD
CY2020Q3	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2019Q3	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	28010000	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	28010000	USD
CY2020Q3	us-gaap	Interest Expense InterestExpense	110993000	USD
CY2019Q3	us-gaap	Interest Expense InterestExpense	106471000	USD
	us-gaap	Interest Expense InterestExpense	319726000	USD
	us-gaap	Interest Expense InterestExpense	309837000	USD
CY2020Q3	us-gaap	Profit Loss ProfitLoss	118060000	USD
CY2019Q3	us-gaap	Profit Loss ProfitLoss	141370000	USD
	us-gaap	Profit Loss ProfitLoss	993786000	USD
	us-gaap	Profit Loss ProfitLoss	475990000	USD
CY2020Q3	us-gaap	Noncontrolling Interest In Net Income Loss Limited Partnerships Nonredeemable NoncontrollingInterestInNetIncomeLossLimitedPartnershipsNonredeemable	15561000	USD
CY2019Q3	us-gaap	Noncontrolling Interest In Net Income Loss Limited Partnerships Nonredeemable NoncontrollingInterestInNetIncomeLossLimitedPartnershipsNonredeemable	18470000	USD
	us-gaap	Noncontrolling Interest In Net Income Loss Limited Partnerships Nonredeemable NoncontrollingInterestInNetIncomeLossLimitedPartnershipsNonredeemable	34280000	USD
	us-gaap	Noncontrolling Interest In Net Income Loss Limited Partnerships Nonredeemable NoncontrollingInterestInNetIncomeLossLimitedPartnershipsNonredeemable	54782000	USD
CY2020Q3	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	10020000	USD
CY2019Q3	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	12504000	USD
	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	97090000	USD
	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	43133000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	92479000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	110396000	USD
	us-gaap	Net Income Loss NetIncomeLoss	862416000	USD
	us-gaap	Net Income Loss NetIncomeLoss	378075000	USD
CY2020Q3	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	2625000	USD
CY2019Q3	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	2625000	USD
	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	7875000	USD
	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	7875000	USD
CY2020Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	89854000	USD
CY2019Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	107771000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	854541000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	370200000	USD
CY2020Q3	bxp	Earnings Per Share After Allccationof Undistributed Earningsto Particiapting Securities Basicdollarspershare EarningsPerShareAfterAllccationofUndistributedEarningstoParticiaptingSecuritiesBasicdollarspershare	0.58
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.70
	bxp	Earnings Per Share After Allccationof Undistributed Earningsto Particiapting Securities Basicdollarspershare EarningsPerShareAfterAllccationofUndistributedEarningstoParticiaptingSecuritiesBasicdollarspershare	5.49
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.40
CY2020Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	155645000	shares
CY2019Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	154577000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	155349000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	154553000	shares
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.58
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.70
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.49
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.39
CY2020Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	155670000	shares
CY2019Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	154820000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	155447000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	154847000	shares
CY2020Q3	us-gaap	Profit Loss ProfitLoss	118060000	USD
CY2019Q3	us-gaap	Profit Loss ProfitLoss	141370000	USD
	us-gaap	Profit Loss ProfitLoss	993786000	USD
	us-gaap	Profit Loss ProfitLoss	475990000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	1027000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-2253000	USD
	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-9352000	USD
	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-9307000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	-1677000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	-1666000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	-5020000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	-4998000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	2704000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-587000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-4332000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-4309000	USD
CY2020Q3	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	120764000	USD
CY2019Q3	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	140783000	USD
	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	989454000	USD
	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	471681000	USD
CY2020Q3	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	25581000	USD
CY2019Q3	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	30974000	USD
	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	131370000	USD
	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	97915000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest	405000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest	69000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest	-45000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest	-54000	USD
CY2020Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	94778000	USD
CY2019Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	109740000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	858129000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	373820000	USD
CY2020Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	8547146000	USD
CY2020Q3	us-gaap	Stock Issued During Period Value Conversion Of Units StockIssuedDuringPeriodValueConversionOfUnits	0	USD
CY2020Q3	bxp	Equity Profit Loss EquityProfitLoss	-118060000	USD
CY2020Q3	us-gaap	Dividends Dividends	172326000	USD
CY2020Q3	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	434000	USD
CY2020Q3	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	8639000	USD
CY2020Q3	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	1407000	USD
CY2020Q3	us-gaap	Noncontrolling Interest In Net Income Loss Joint Venture Partners Nonredeemable NoncontrollingInterestInNetIncomeLossJointVenturePartnersNonredeemable	11026000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	1027000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Other Net Of Tax OtherComprehensiveIncomeOtherNetOfTax	1677000	USD
CY2020Q3	us-gaap	Noncontrolling Interest Increase From Subsidiary Equity Issuance NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance	0	USD
CY2020Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	8495038000	USD
CY2019Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	8020667000	USD
CY2019Q3	us-gaap	Stock Issued During Period Value Conversion Of Units StockIssuedDuringPeriodValueConversionOfUnits	0	USD
CY2019Q3	bxp	Equity Profit Loss EquityProfitLoss	-141370000	USD
CY2019Q3	us-gaap	Dividends Dividends	166668000	USD
CY2019Q3	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	315000	USD
CY2019Q3	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-445000	USD
CY2019Q3	bxp	Saleofaninterestinpropertypartnerships Saleofaninterestinpropertypartnerships	0	USD
CY2019Q3	bxp	Difference Between Purchase Price And Carrying Value DifferenceBetweenPurchasePriceAndCarryingValue	43000	USD
CY2019Q3	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	14820000	USD
CY2019Q3	us-gaap	Noncontrolling Interest In Net Income Loss Joint Venture Partners Nonredeemable NoncontrollingInterestInNetIncomeLossJointVenturePartnersNonredeemable	13748000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	-2253000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Other Net Of Tax OtherComprehensiveIncomeOtherNetOfTax	1666000	USD
CY2019Q3	us-gaap	Noncontrolling Interest Increase From Subsidiary Equity Issuance NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance	0	USD
CY2019Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	7995767000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	8014236000	USD
	us-gaap	Cumulative Effect On Retained Earnings Net Of Tax1 CumulativeEffectOnRetainedEarningsNetOfTax1	-1679000	USD
	us-gaap	Stock Issued During Period Value Conversion Of Units StockIssuedDuringPeriodValueConversionOfUnits	0	USD
	bxp	Equity Profit Loss EquityProfitLoss	-993786000	USD
	us-gaap	Dividends Dividends	516929000	USD
	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	759000	USD
	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	41924000	USD
	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	7364000	USD
	us-gaap	Noncontrolling Interest In Net Income Loss Joint Venture Partners Nonredeemable NoncontrollingInterestInNetIncomeLossJointVenturePartnersNonredeemable	40091000	USD
	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	-9352000	USD
	us-gaap	Other Comprehensive Income Other Net Of Tax OtherComprehensiveIncomeOtherNetOfTax	5020000	USD
	us-gaap	Noncontrolling Interest Increase From Subsidiary Equity Issuance NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance	0	USD
CY2020Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	8495038000	USD
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	8213968000	USD
	us-gaap	Cumulative Effect On Retained Earnings Net Of Tax1 CumulativeEffectOnRetainedEarningsNetOfTax1	-4379000	USD
	us-gaap	Stock Issued During Period Value Conversion Of Units StockIssuedDuringPeriodValueConversionOfUnits	0	USD
	bxp	Equity Profit Loss EquityProfitLoss	-475990000	USD
	us-gaap	Dividends Dividends	499934000	USD
	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	688000	USD
	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	26887000	USD
	bxp	Saleofaninterestinpropertypartnerships Saleofaninterestinpropertypartnerships	0	USD
	bxp	Difference Between Purchase Price And Carrying Value DifferenceBetweenPurchasePriceAndCarryingValue	-186963000	USD
	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	26968000	USD
	us-gaap	Noncontrolling Interest In Net Income Loss Joint Venture Partners Nonredeemable NoncontrollingInterestInNetIncomeLossJointVenturePartnersNonredeemable	53149000	USD
	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	-9307000	USD
	us-gaap	Other Comprehensive Income Other Net Of Tax OtherComprehensiveIncomeOtherNetOfTax	4998000	USD
	us-gaap	Noncontrolling Interest Increase From Subsidiary Equity Issuance NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance	0	USD
CY2019Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	7995767000	USD
	us-gaap	Profit Loss ProfitLoss	993786000	USD
	us-gaap	Profit Loss ProfitLoss	475990000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	515738000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	507867000	USD
	bxp	Amortizationofrightofuseassetoperatingleases Amortizationofrightofuseassetoperatingleases	1667000	USD
	bxp	Amortizationofrightofuseassetoperatingleases Amortizationofrightofuseassetoperatingleases	1821000	USD
	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	0	USD
	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	24038000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	36152000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	33253000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-5410000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	47528000	USD
	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	22285000	USD
	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	16770000	USD
	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	965000	USD
	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	4240000	USD
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	1997000	USD
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	0	USD
	us-gaap	Paid In Kind Interest PaidInKindInterest	17397000	USD
	us-gaap	Paid In Kind Interest PaidInKindInterest	16594000	USD
	us-gaap	Accretion Expense AccretionExpense	0	USD
	us-gaap	Accretion Expense AccretionExpense	-763000	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	28010000	USD
	us-gaap	Gain Loss On Sale Of Properties Before Applicable Income Taxes GainLossOnSaleOfPropertiesBeforeApplicableIncomeTaxes	613723000	USD
	us-gaap	Gain Loss On Sale Of Properties Before Applicable Income Taxes GainLossOnSaleOfPropertiesBeforeApplicableIncomeTaxes	766000	USD
	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-18543000	USD
	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	20677000	USD
	us-gaap	Increase Decrease In Finance Receivables IncreaseDecreaseInFinanceReceivables	395000	USD
	us-gaap	Increase Decrease In Finance Receivables IncreaseDecreaseInFinanceReceivables	376000	USD
	us-gaap	Straight Line Rent StraightLineRent	85843000	USD
	us-gaap	Straight Line Rent StraightLineRent	19327000	USD
	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	60365000	USD
	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	63857000	USD
	us-gaap	Operating Lease Payments OperatingLeasePayments	-1157000	USD
	us-gaap	Operating Lease Payments OperatingLeasePayments	-1191000	USD
	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	8273000	USD
	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	32467000	USD
	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-1202000	USD
	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-6104000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-24868000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-78449000	USD
	us-gaap	Lease Cost LeaseCost	-52621000	USD
	us-gaap	Lease Cost LeaseCost	-76122000	USD
	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	-211363000	USD
	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	343802000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	782423000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	819792000	USD
	us-gaap	Payments To Acquire And Develop Real Estate PaymentsToAcquireAndDevelopRealEstate	135698000	USD
	us-gaap	Payments To Acquire And Develop Real Estate PaymentsToAcquireAndDevelopRealEstate	148912000	USD
	us-gaap	Payments To Acquire Other Productive Assets PaymentsToAcquireOtherProductiveAssets	358824000	USD
	bxp	Rightofuseassetsfinanceleases Rightofuseassetsfinanceleases	5152000	USD
	us-gaap	Payments To Acquire Other Productive Assets PaymentsToAcquireOtherProductiveAssets	390275000	USD
	us-gaap	Payments For Capital Improvements PaymentsForCapitalImprovements	116894000	USD
	us-gaap	Payments For Capital Improvements PaymentsForCapitalImprovements	129340000	USD
	us-gaap	Payments For Tenant Improvements PaymentsForTenantImprovements	172401000	USD
	us-gaap	Payments For Tenant Improvements PaymentsForTenantImprovements	191532000	USD
	bxp	Rightofuseassetsfinanceleases Rightofuseassetsfinanceleases	0	USD
	us-gaap	Proceeds From Sale Of Real Estate Heldforinvestment ProceedsFromSaleOfRealEstateHeldforinvestment	505679000	USD
	us-gaap	Proceeds From Sale Of Real Estate Heldforinvestment ProceedsFromSaleOfRealEstateHeldforinvestment	83486000	USD
	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	158374000	USD
	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	65499000	USD
	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	55123000	USD
	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	136807000	USD
	us-gaap	Payments For Proceeds From Other Real Estate Partnerships PaymentsForProceedsFromOtherRealEstatePartnerships	0	USD
	us-gaap	Payments For Proceeds From Other Real Estate Partnerships PaymentsForProceedsFromOtherRealEstatePartnerships	24112000	USD
	us-gaap	Payments To Acquire Loans Receivable PaymentsToAcquireLoansReceivable	9800000	USD
	us-gaap	Payments To Acquire Loans Receivable PaymentsToAcquireLoansReceivable	0	USD
	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	-2778000	USD
	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	1937000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-388411000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-736466000	USD
	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	12795000	USD
	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	15510000	USD
	us-gaap	Proceeds From Issuance Of Unsecured Debt ProceedsFromIssuanceOfUnsecuredDebt	1248125000	USD
	us-gaap	Proceeds From Issuance Of Unsecured Debt ProceedsFromIssuanceOfUnsecuredDebt	1548106000	USD
	us-gaap	Repayments Of Unsecured Debt RepaymentsOfUnsecuredDebt	0	USD
	us-gaap	Repayments Of Unsecured Debt RepaymentsOfUnsecuredDebt	699237000	USD
	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	265000000	USD
	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	380000000	USD
	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	265000000	USD
	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	380000000	USD
	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	0	USD
	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	502000	USD
	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	10416000	USD
	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	13130000	USD
	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	0	USD
	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	27270000	USD
	us-gaap	Proceeds From Issuance Or Sale Of Equity ProceedsFromIssuanceOrSaleOfEquity	3276000	USD
	us-gaap	Proceeds From Issuance Or Sale Of Equity ProceedsFromIssuanceOrSaleOfEquity	2562000	USD
	us-gaap	Payments Of Dividends PaymentsOfDividends	516572000	USD
	us-gaap	Payments Of Dividends PaymentsOfDividends	499627000	USD
	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	7364000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	644950000	USD
	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	26968000	USD
	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	40091000	USD
	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	53149000	USD
	us-gaap	Proceeds From Payments To Minority Shareholders ProceedsFromPaymentsToMinorityShareholders	0	USD
	us-gaap	Proceeds From Payments To Minority Shareholders ProceedsFromPaymentsToMinorityShareholders	186963000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	678891000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	82248000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	1072903000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	165574000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	691886000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	639191000	USD
CY2020Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1764789000	USD
CY2019Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	804765000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	543359000	USD
	bxp	Prepaidrentreclassifiedtorightofuseasset Prepaidrentreclassifiedtorightofuseasset	0	USD
CY2019Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	46936000	USD
CY2018Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	95832000	USD
CY2020Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1714783000	USD
CY2019Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	751210000	USD
CY2020Q3	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	50006000	USD
CY2019Q3	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	53555000	USD
	us-gaap	Interest Paid InterestPaid	335591000	USD
	us-gaap	Interest Paid InterestPaid	338033000	USD
	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	41329000	USD
	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	41253000	USD
	bxp	Writeoffoffullydepreciatedrealestate Writeoffoffullydepreciatedrealestate	73584000	USD
	bxp	Writeoffoffullydepreciatedrealestate Writeoffoffullydepreciatedrealestate	86496000	USD
	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	30924000	USD
	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	-95857000	USD
	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	0	USD
	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	287540000	USD
	bxp	Prepaidrentreclassifiedtorightofuseasset Prepaidrentreclassifiedtorightofuseasset	15000000	USD
	bxp	Accruedrentalincomenetdeconsolidated Accruedrentalincomenetdeconsolidated	4558000	USD
	bxp	Accruedrentalincomenetdeconsolidated Accruedrentalincomenetdeconsolidated	0	USD
	bxp	Transfer Of Tenant Lease Costs Real Estate TransferOfTenantLeaseCostsRealEstate	3462000	USD
	bxp	Transfer Of Tenant Lease Costs Real Estate TransferOfTenantLeaseCostsRealEstate	0	USD
	us-gaap	Transfer Of Other Real Estate TransferOfOtherRealEstate	111889000	USD
	us-gaap	Transfer Of Other Real Estate TransferOfOtherRealEstate	12767000	USD
	bxp	Transfer Of Tenant Improvements Real Estate TransferOfTenantImprovementsRealEstate	12331000	USD
	bxp	Transfer Of Tenant Improvements Real Estate TransferOfTenantImprovementsRealEstate	0	USD
	us-gaap	Other Significant Noncash Transaction Value Of Consideration Given1 OtherSignificantNoncashTransactionValueOfConsiderationGiven1	0	USD
	us-gaap	Other Significant Noncash Transaction Value Of Consideration Given1 OtherSignificantNoncashTransactionValueOfConsiderationGiven1	135004000	USD
	bxp	Leaseliabilityfinanceleasedeconsolidation Leaseliabilityfinanceleasedeconsolidation	0	USD
	bxp	Leaseliabilityfinanceleasedeconsolidation Leaseliabilityfinanceleasedeconsolidation	-119534000	USD
	us-gaap	Transfer To Investments TransferToInvestments	347898000	USD
	us-gaap	Transfer To Investments TransferToInvestments	29246000	USD
CY2020Q3	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	171070000	USD
CY2019Q3	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	165421000	USD
	bxp	Conversions Of Noncontrolling Interests To Stockholders Equity ConversionsOfNoncontrollingInterestsToStockholdersEquity	26682000	USD
	bxp	Conversions Of Noncontrolling Interests To Stockholders Equity ConversionsOfNoncontrollingInterestsToStockholdersEquity	1435000	USD
	bxp	Issuance Of Restricted Securities To Employees And Directors IssuanceOfRestrictedSecuritiesToEmployeesAndDirectors	43244000	USD
	bxp	Issuance Of Restricted Securities To Employees And Directors IssuanceOfRestrictedSecuritiesToEmployeesAndDirectors	38923000	USD
	us-gaap	Limited Liability Company Llc Or Limited Partnership Lp Managing Member Or General Partner Ownership Interest LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest	0.899
CY2019	us-gaap	Limited Liability Company Llc Or Limited Partnership Lp Managing Member Or General Partner Ownership Interest LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest	0.896
CY2020Q3	bxp	Restriction On Redemption Of Op Units From Date Of Issuance In Years RestrictionOnRedemptionOfOpUnitsFromDateOfIssuanceInYears	1	Y
CY2020Q3	bxp	Op Unit Conversion Rate OpUnitConversionRate	1	shares
CY2020Q3	bxp	Common Stock Conversion Rate CommonStockConversionRate	1	shares
CY2020Q3	bxp	Op Unit Conversion Rate OpUnitConversionRate	1	shares
CY2020Q3	bxp	Number Of Series Of Preferred Units Outstanding NumberOfSeriesOfPreferredUnitsOutstanding	1
	us-gaap	Use Of Estimates UseOfEstimates	The Company bases its estimates on historical experience and on various other assumptions that it considers to be reasonable under the circumstances, including the impact of extraordinary events such as the novel coronavirus (“COVID-19”) pandemic, the results of which form the basis for making significant judgments about the carrying values of assets and liabilities, assessments of future collectability, and other areas of the financial statements that are impacted by the use of estimates. Actual results may differ from these estimates under different assumptions or conditions.
CY2020Q3	bxp	Numberof Vi Es NumberofVIEs	6
CY2020Q3	bxp	Numberof Vi Es Total NumberofVIEsTotal	7
CY2020Q3	us-gaap	Land Land	5069206000	USD
CY2019Q4	us-gaap	Land Land	5111606000	USD
CY2020Q3	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	237382000	USD
CY2019Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	237394000	USD
CY2020Q3	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	146973000	USD
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	148640000	USD
CY2020Q3	us-gaap	Land Available For Development LandAvailableForDevelopment	446392000	USD
CY2019Q4	us-gaap	Land Available For Development LandAvailableForDevelopment	254828000	USD
CY2020Q3	us-gaap	Investment Building And Building Improvements InvestmentBuildingAndBuildingImprovements	13748127000	USD
CY2019Q4	us-gaap	Investment Building And Building Improvements InvestmentBuildingAndBuildingImprovements	13646054000	USD
CY2020Q3	us-gaap	Leasehold Improvements Gross LeaseholdImprovementsGross	2687911000	USD
CY2019Q4	us-gaap	Leasehold Improvements Gross LeaseholdImprovementsGross	2656439000	USD
CY2020Q3	us-gaap	Furniture And Fixtures Gross FurnitureAndFixturesGross	49209000	USD
CY2019Q4	us-gaap	Furniture And Fixtures Gross FurnitureAndFixturesGross	44313000	USD
CY2020Q3	us-gaap	Construction In Progress Gross ConstructionInProgressGross	769846000	USD
CY2019Q4	us-gaap	Construction In Progress Gross ConstructionInProgressGross	789736000	USD
CY2020Q3	bxp	Real Estate Investment Property At Cost Including Rightof Use Assets RealEstateInvestmentPropertyAtCostIncludingRightofUseAssets	23155046000	USD
CY2019Q4	bxp	Real Estate Investment Property At Cost Including Rightof Use Assets RealEstateInvestmentPropertyAtCostIncludingRightofUseAssets	22889010000	USD
CY2020Q3	us-gaap	Real Estate Investment Property Accumulated Depreciation RealEstateInvestmentPropertyAccumulatedDepreciation	5413709000	USD
CY2019Q4	us-gaap	Real Estate Investment Property Accumulated Depreciation RealEstateInvestmentPropertyAccumulatedDepreciation	5266798000	USD
CY2020Q3	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	17741337000	USD
CY2019Q4	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	17622212000	USD
CY2020Q3	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	4100000	USD
	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	41500000	USD
CY2020Q3	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	3400000	USD
	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	22300000	USD
CY2020Q3	us-gaap	Operating Lease Lease Income Lease Payments OperatingLeaseLeaseIncomeLeasePayments	557384000	USD
CY2019Q3	us-gaap	Operating Lease Lease Income Lease Payments OperatingLeaseLeaseIncomeLeasePayments	566294000	USD
	us-gaap	Operating Lease Lease Income Lease Payments OperatingLeaseLeaseIncomeLeasePayments	1673855000	USD
	us-gaap	Operating Lease Lease Income Lease Payments OperatingLeaseLeaseIncomeLeasePayments	1678100000	USD
CY2020Q3	us-gaap	Operating Lease Variable Lease Income OperatingLeaseVariableLeaseIncome	109290000	USD
CY2019Q3	us-gaap	Operating Lease Variable Lease Income OperatingLeaseVariableLeaseIncome	125931000	USD
	us-gaap	Operating Lease Variable Lease Income OperatingLeaseVariableLeaseIncome	333049000	USD
	us-gaap	Operating Lease Variable Lease Income OperatingLeaseVariableLeaseIncome	373565000	USD
CY2020Q3	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	666674000	USD
CY2019Q3	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	692225000	USD
	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	2006904000	USD
	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	2051665000	USD
CY2020Q3	bxp	Investments In Affiliates Subsidiaries Associates And Joint Venturesnet InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVenturesnet	1347835000	USD
CY2019Q4	bxp	Investments In Affiliates Subsidiaries Associates And Joint Venturesnet InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVenturesnet	933223000	USD
	bxp	Schedule Of Statements Of Operations Of Unconsolidated Joint Ventures Text Bock ScheduleOfStatementsOfOperationsOfUnconsolidatedJointVenturesTextBock	<div style="margin-top:14pt;text-indent:24.75pt"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The combined summarized statements of operations of the Company’s unconsolidated joint ventures are as follows:</span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%"> </span></div><div style="margin-bottom:5pt;margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;vertical-align:top;width:100.000%"><tr><td style="width:1.0%"/><td style="width:44.660%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.180%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:1.408%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.180%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:1.700%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.180%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:1.408%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.184%"/><td style="width:0.1%"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%"> </span></td><td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:700;line-height:100%">Three months ended September 30,</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:700;line-height:100%">Nine months ended September 30,</span></td><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%"> </span></td><td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:700;line-height:100%">2020</span></td><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="border-bottom:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:700;line-height:100%">2019</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="border-bottom:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:700;line-height:100%">2020</span></td><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="border-bottom:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:700;line-height:100%">2019</span></td><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%"> </span></td><td colspan="21" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:700;line-height:100%">(in thousands)</span></td><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:top"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Total revenue (1)</span></td><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">87,724 </span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">75,940 </span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">270,490 </span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">239,099 </span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:top"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Expenses</span></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 18pt;text-align:left;vertical-align:top"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Operating</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">37,572 </span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">28,839 </span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">106,677 </span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">89,472 </span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 18pt;text-align:left;vertical-align:top"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Depreciation and amortization</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">35,810 </span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">23,477 </span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">105,235 </span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">76,941 </span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:top"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Total expenses</span></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">73,382 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">52,316 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">211,912 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">166,413 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:top"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Other income (expense)</span></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 18pt;text-align:left;vertical-align:top"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Interest expense</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(25,481)</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(20,483)</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(71,370)</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(62,043)</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 18pt;text-align:left;vertical-align:top"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Gains on sales of real estate</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">— </span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(812)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">11,720 </span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">33,760 </span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 36pt;text-align:left;vertical-align:top"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Net income</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(11,139)</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">2,329 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(1,072)</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">44,403 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;border-top:3pt double #000000;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;border-top:3pt double #000000;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;border-top:3pt double #000000;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;border-top:3pt double #000000;padding:0 1pt"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:top"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Company’s share of net income</span></td><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(4,421)</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">392 </span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">855 </span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">24,352 </span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:top"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Basis differential (2)</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(2,452)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(1,041)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(6,265)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">23,176 </span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:top"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Income from unconsolidated joint ventures</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(6,873)</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(649)</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(5,410)</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:100%">47,528 </span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr></table></div><div><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:120%">_______________ </span></div><div style="padding-left:27pt;text-indent:-18pt"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">(1)</span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%;padding-left:7.02pt">Includes straight-line rent adjustments of approximately $3.8 million and $5.3 million for the three months ended September 30, 2020 and 2019, respectively, and $22.0 million and $18.7 million for the nine months ended September 30, 2020 and 2019, respectively. </span></div>(2)Includes straight-line rent adjustments of approximately $0.4 million and $0.5 million for the three months ended September 30, 2020 and 2019, respectively, and $1.3 million and $1.6 million for the nine months ended September 30, 2020 and 2019, respectively. Also includes net above-/below-market rent adjustments of approximately $0.2 million and $0.4 million for the three months ended September 30, 2020 and 2019, respectively, and $0.7 million and $1.3 million for the nine months ended September 30, 2020 and 2019, respectively.
CY2020Q3	bxp	Letter Of Credit And Performance Obligation LetterOfCreditAndPerformanceObligation	19400000	USD
CY2020Q3	bxp	Insurance Policy Limit InsurancePolicyLimit	1000000000.0	USD
CY2020Q3	bxp	Insurance Policy Limit InsurancePolicyLimit	1000000000.0	USD
	bxp	Per Occurrence Limit For Nbcr Coverage PerOccurrenceLimitForNbcrCoverage	1000000000.0	USD
CY2020Q3	bxp	Program Trigger Value ProgramTriggerValue	200000000	USD
	bxp	Program Trigger Coinsurance ProgramTriggerCoinsurance	0.20
	bxp	Programtriggerdeductible Programtriggerdeductible	0.20
	bxp	Earthquake Deductible Insurance Percentage Of Value Of The Affected Property San Franciscoand Los Angeles EarthquakeDeductibleInsurancePercentageOfValueOfTheAffectedPropertySanFranciscoandLosAngeles	0.03
	bxp	Per Occurrence Limit Of Earth Quake Insurance San Franciscoand Los Angeles PerOccurrenceLimitOfEarthQuakeInsuranceSanFranciscoandLosAngeles	240000000	USD
	bxp	Annual Aggregate Limit Of Earth Quake Insurance San Franciscoand Los Angeles AnnualAggregateLimitOfEarthQuakeInsuranceSanFranciscoandLosAngeles	240000000	USD
	bxp	Amount Of Earthquake Insurance Provided By Ixpllc As Direct Insurer San Franciscoand Los Angeles AmountOfEarthquakeInsuranceProvidedByIXPLLCAsDirectInsurerSanFranciscoandLosAngeles	20000000	USD
CY2019Q4	us-gaap	Minority Interest In Limited Partnerships MinorityInterestInLimitedPartnerships	1700000000	USD
CY2020Q3	us-gaap	Minority Interest In Limited Partnerships MinorityInterestInLimitedPartnerships	1700000000	USD
CY2020Q3	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	155636300	shares
CY2020Q3	us-gaap	General Partners Capital Account Units Outstanding GeneralPartnersCapitalAccountUnitsOutstanding	1730948	shares
CY2020Q3	us-gaap	Limited Partners Capital Account Units Outstanding LimitedPartnersCapitalAccountUnitsOutstanding	153905352	shares
	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	43792	shares
	us-gaap	Conversion Of Stock Shares Issued1 ConversionOfStockSharesIssued1	773858	shares
CY2020Q3	us-gaap	Dividends Payable Amount Per Share DividendsPayableAmountPerShare	0.98
CY2020Q3	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.98
CY2020Q2	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.98
CY2020Q1	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.98
CY2019Q4	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.95
CY2019Q3	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.95
CY2019Q2	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.95
CY2019Q1	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.95
CY2020Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	89854000	USD
CY2020Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	155645000	shares
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.58
CY2020Q3	us-gaap	Dilutive Securities DilutiveSecurities	0	USD
CY2020Q3	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	25000	shares
CY2020Q3	bxp	Weighted Average Number Diluted Shares Outstanding Adjustmentpershare WeightedAverageNumberDilutedSharesOutstandingAdjustmentpershare	0
CY2020Q3	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	89854000	USD
	bxp	Allocationofundistributedearningstoparticipatingsecuritiespershares Allocationofundistributedearningstoparticipatingsecuritiespershares	-0.01
CY2020Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	155670000	shares
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.58
CY2019Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	107771000	USD
CY2019Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	154577000	shares
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.70
CY2019Q3	us-gaap	Dilutive Securities DilutiveSecurities	0	USD
CY2019Q3	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	243000	shares
CY2019Q3	bxp	Weighted Average Number Diluted Shares Outstanding Adjustmentpershare WeightedAverageNumberDilutedSharesOutstandingAdjustmentpershare	0
CY2019Q3	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	107771000	USD
CY2019Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	154820000	shares
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.70
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	854541000	USD
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	155349000	shares
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.50
	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Basic ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic	1150000	USD
	bxp	Allocationofundistributedearningstoparticipatingsecuritiesinshares Allocationofundistributedearningstoparticipatingsecuritiesinshares	0	shares
	bxp	Net Income Loss Available To Common Stockholders After Allocationof Undistributed Earningsto Participating Securities Basic NetIncomeLossAvailableToCommonStockholdersAfterAllocationofUndistributedEarningstoParticipatingSecuritiesBasic	853391000	USD
	bxp	Weighted Average Number Of Shares Outstanding After Allocationof Undistributed Earningsto Participating Securities Basicinshares WeightedAverageNumberOfSharesOutstandingAfterAllocationofUndistributedEarningstoParticipatingSecuritiesBasicinshares	155349000	shares
	bxp	Earnings Per Share After Allccationof Undistributed Earningsto Particiapting Securities Basicdollarspershare EarningsPerShareAfterAllccationofUndistributedEarningstoParticiaptingSecuritiesBasicdollarspershare	5.49
	us-gaap	Dilutive Securities DilutiveSecurities	0	USD
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	98000	shares
	bxp	Weighted Average Number Diluted Shares Outstanding Adjustmentpershare WeightedAverageNumberDilutedSharesOutstandingAdjustmentpershare	0
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	853391000	USD
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	155447000	shares
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.49
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	370200000	USD
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	154553000	shares
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.40
	us-gaap	Dilutive Securities DilutiveSecurities	0	USD
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	294000	shares
	bxp	Weighted Average Number Diluted Shares Outstanding Adjustmentpershare WeightedAverageNumberDilutedSharesOutstandingAdjustmentpershare	-0.01
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	370200000	USD
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	154847000	shares
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.39
CY2020Q3	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	8000000.0	USD
CY2019Q3	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	7500000	USD
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	35300000	USD
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	32400000	USD
CY2020Q3	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	4100000	USD
	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	41500000	USD
CY2020Q3	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	3400000	USD
	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	22300000	USD
CY2020Q3	bxp	Rental Revenue Class Office RentalRevenueClassOffice	673283000	USD
CY2020Q3	bxp	Rental Revenue Residential RentalRevenueResidential	9718000	USD
CY2020Q3	bxp	Rental Revenue Total RentalRevenueTotal	683091000	USD
CY2020Q3	bxp	Percentage Of Total Revenue PercentageOfTotalRevenue	1.0000
CY2020Q3	bxp	Rental Expenses Class Office RentalExpensesClassOffice	253306000	USD
CY2020Q3	bxp	Rental Expenses Residential RentalExpensesResidential	4955000	USD
CY2020Q3	bxp	Rental Expenses Operating Expenses Total RentalExpensesOperatingExpensesTotal	261425000	USD
CY2020Q3	bxp	Percentage Of Total Rental Expenses PercentageOfTotalRentalExpenses	1.0000
CY2020Q3	us-gaap	Gross Profit GrossProfit	421666000	USD
CY2020Q3	bxp	Percentage Of Total Net Operating Income PercentageOfTotalNetOperatingIncome	1.0000
CY2020Q3	bxp	Percentageof Companys Shareof Net Operating Income PercentageofCompanysShareofNetOperatingIncome	1.0000
CY2019Q3	bxp	Rental Revenue Class Office RentalRevenueClassOffice	707811000	USD
CY2019Q3	bxp	Rental Revenue Residential RentalRevenueResidential	9996000	USD
CY2019Q3	bxp	Rental Revenue Total RentalRevenueTotal	730821000	USD
CY2019Q3	bxp	Percentage Of Total Revenue PercentageOfTotalRevenue	1.0000
CY2019Q3	bxp	Rental Expenses Class Office RentalExpensesClassOffice	261592000	USD
CY2019Q3	bxp	Rental Expenses Residential RentalExpensesResidential	4011000	USD
CY2019Q3	bxp	Rental Expenses Operating Expenses Total RentalExpensesOperatingExpensesTotal	274346000	USD
CY2019Q3	bxp	Percentage Of Total Rental Expenses PercentageOfTotalRentalExpenses	1.0000
CY2019Q3	us-gaap	Gross Profit GrossProfit	456475000	USD
CY2019Q3	bxp	Percentage Of Total Net Operating Income PercentageOfTotalNetOperatingIncome	1.0000
CY2019Q3	bxp	Percentageof Companys Shareof Net Operating Income PercentageofCompanysShareofNetOperatingIncome	1.0000
	bxp	Rental Revenue Class Office RentalRevenueClassOffice	2032605000	USD
	bxp	Rental Revenue Residential RentalRevenueResidential	29076000	USD
	bxp	Rental Revenue Total RentalRevenueTotal	2068695000	USD
	bxp	Percentage Of Total Revenue PercentageOfTotalRevenue	1.0000
	bxp	Rental Expenses Class Office RentalExpensesClassOffice	748030000	USD
	bxp	Rental Expenses Residential RentalExpensesResidential	12984000	USD
	bxp	Rental Expenses Operating Expenses Total RentalExpensesOperatingExpensesTotal	772972000	USD
	bxp	Percentage Of Total Rental Expenses PercentageOfTotalRentalExpenses	1.0000
	us-gaap	Gross Profit GrossProfit	1295723000	USD
	bxp	Percentage Of Total Net Operating Income PercentageOfTotalNetOperatingIncome	1.0000
	bxp	Percentageof Companys Shareof Net Operating Income PercentageofCompanysShareofNetOperatingIncome	1.0000
	bxp	Rental Revenue Class Office RentalRevenueClassOffice	2101762000	USD
	bxp	Rental Revenue Residential RentalRevenueResidential	26710000	USD
	bxp	Rental Revenue Total RentalRevenueTotal	2165268000	USD
	bxp	Percentage Of Total Revenue PercentageOfTotalRevenue	1.0000
	bxp	Rental Expenses Class Office RentalExpensesClassOffice	769184000	USD
	bxp	Rental Expenses Residential RentalExpensesResidential	11907000	USD
	bxp	Rental Expenses Operating Expenses Total RentalExpensesOperatingExpensesTotal	806777000	USD
	bxp	Percentage Of Total Rental Expenses PercentageOfTotalRentalExpenses	1.0000
	us-gaap	Gross Profit GrossProfit	1358491000	USD
	bxp	Percentage Of Total Net Operating Income PercentageOfTotalNetOperatingIncome	1.0000
	bxp	Percentageof Companys Shareof Net Operating Income PercentageofCompanysShareofNetOperatingIncome	1.0000
CY2020Q3	bxp	Rental Revenue Residential RentalRevenueResidential	9718000	USD
CY2019Q3	bxp	Rental Revenue Residential RentalRevenueResidential	9996000	USD
CY2020Q3	bxp	Rental Expenses Residential RentalExpensesResidential	4955000	USD
CY2019Q3	bxp	Rental Expenses Residential RentalExpensesResidential	4011000	USD

Files In Submission

Name	View Source	Status
0001656423-20-000046-index-headers.html	Edgar Link	pending
0001656423-20-000046-index.html	Edgar Link	pending
0001656423-20-000046.txt	Edgar Link	pending
0001656423-20-000046-xbrl.zip	Edgar Link	pending
bxp-20200930.htm	Edgar Link	pending
bxp-20200930.xsd	Edgar Link	pending
bxp-20200930_cal.xml	Edgar Link	unprocessable
bxp-20200930_def.xml	Edgar Link	unprocessable
bxp-20200930_htm.xml	Edgar Link	completed
bxp-20200930_lab.xml	Edgar Link	unprocessable
bxp-20200930_pre.xml	Edgar Link	unprocessable
bxpbplp-2020930ex311.htm	Edgar Link	pending
bxpbplp-2020930ex313.htm	Edgar Link	pending
bxpbplp-2020930ex314.htm	Edgar Link	pending
bxpbplp-2020930ex321.htm	Edgar Link	pending
bxpbplp-2020930ex322.htm	Edgar Link	pending
bxpbplp-2020930ex323.htm	Edgar Link	pending
bxpbplp-2020930ex324.htm	Edgar Link	pending
bxpbplp2020930ex312.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
R1.htm	Edgar Link	pending
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Show.js	Edgar Link	pending

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$BXP
BXP, Inc. Stock $bxp

2020 Q4 Form 10-Q Financial Statement

#000165642320000046 Filed on November 06, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$BXP BXP, Inc. Stock $bxp

2020 Q4 Form 10-Q Financial Statement

#000165642320000046 Filed on November 06, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$BXP
BXP, Inc. Stock $bxp