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Segment Information (Schedule Of Reconciliation Of Net Operating Income To Net Income) (Details) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Net income attributable to the company's common shareholders / unitholders | $ 222,989,000 | $ 111,703,000 | $ 366,044,000 | $ 203,372,000
Preferred Stock Redemption Charge | 0 | 0 | 0 | (6,412,000)
Preferred dividends / distributions | 0 | 0 | 0 | (2,560,000)
Noncontrolling interest-common units of the Operating Partnership | (25,708,000) | (12,383,000) | (42,061,000) | (23,422,000)
Noncontrolling interest in property partnerships | (18,546,000) | (17,164,000) | (36,095,000) | (33,631,000)
Interest expense | (104,142,000) | (106,319,000) | (205,370,000) | (214,221,000)
Loss from early extinguishment of debt | 0 | 0 | 0 | 898,000
Company's share of net operating income from joint ventures | (484,042,000) | (453,169,000) | (953,358,000) | (897,116,000)
Depreciation and amortization expense | (183,146,000) | (183,838,000) | (360,770,000) | (360,403,000)
Transaction costs | (496,000) | (751,000) | (496,000) | (1,082,000)
General and administrative expense | (34,665,000) | (38,405,000) | (77,859,000) | (83,364,000)
Gains (losses) from investments in securities | 4,716,000 | (2,275,000) | 6,978,000 | (3,934,000)
Other Income - assignment fee | (6,624,000) | 0 | (6,624,000) | 0
Interest and other income (loss) | (1,195,000) | (1,452,000) | (2,423,000) | (2,620,000)
Gains on sales of real estate | (96,247,000) | (7,756,000) | (118,948,000) | (7,756,000)
Income (loss) from unconsolidated joint ventures | 54,000 | 1,373,000 | (2,135,000) | (3,852,000)
Segment Reconciling Items |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Net income attributable to the company's common shareholders / unitholders | 222,989,000 | 111,703,000 | 366,044,000 | 203,372,000
Preferred Stock Redemption Charge | 0 | 0 | 0 | 6,412,000
Preferred dividends / distributions | 0 | 0 | 0 | 2,560,000
Noncontrolling interest-common units of the Operating Partnership | 25,708,000 | 12,383,000 | 42,061,000 | 23,422,000
Noncontrolling interest in property partnerships | 18,546,000 | 17,164,000 | 36,095,000 | 33,631,000
Interest expense | 104,142,000 | 106,319,000 | 205,370,000 | 214,221,000
Loss from early extinguishment of debt | 0 | 0 | 0 | 898,000
Depreciation and amortization expense | 183,146,000 | 183,838,000 | 360,770,000 | 360,403,000
Transaction costs | 496,000 | 751,000 | 496,000 | 1,082,000
Operating expense | 3,239,000 | 2,655,000 | 7,304,000 | 6,160,000
General and administrative expense | 34,665,000 | 38,405,000 | 77,859,000 | 83,364,000
Gains (losses) from investments in securities | (4,716,000) | 2,275,000 | (6,978,000) | 3,934,000
Other Income - assignment fee | 6,624,000 | 0 | 6,624,000 | 0
Interest and other income (loss) | 1,195,000 | 1,452,000 | 2,423,000 | 2,620,000
Gains on sales of real estate | 96,247,000 | 7,756,000 | 118,948,000 | 7,756,000
Income (loss) from unconsolidated joint ventures | (54,000) | (1,373,000) | 2,135,000 | 3,852,000
Other revenue | 3,239,000 | 2,655,000 | 7,304,000 | 6,160,000
Company's share of Net Operating Income | 471,890,000 | 432,299,000 | 931,472,000 | 856,665,000
Unconsolidated Joint Ventures [Member] |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Interest expense | (32,219,000) | (25,636,000) | (62,592,000) | (51,192,000)
Loss from early extinguishment of debt | 0 | 0 | 1,327,000 | 0
Depreciation and amortization expense | (43,293,000) | (33,627,000) | (87,957,000) | (67,730,000)
Transaction costs | (811,000) | 0 | (811,000) | (7,000)
Income (loss) from unconsolidated joint ventures | 54,000 | 1,373,000 | (2,135,000) | (3,852,000)
Unconsolidated Joint Ventures [Member] | Segment Reconciling Items |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Company's share of net operating income from joint ventures | 35,710,000 | 25,417,000 | 73,031,000 | 50,212,000
Boston Properties Limited Partnership |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Net income attributable to the company's common shareholders / unitholders | 253,788,000 | 125,846,000 | 415,617,000 | 231,619,000
Preferred Stock Redemption Charge | 0 | 0 | 0 | (6,412,000)
Preferred dividends / distributions | 0 | 0 | 0 | (2,560,000)
Noncontrolling interest in property partnerships | (18,546,000) | (17,164,000) | (36,095,000) | (33,631,000)
Interest expense | (104,142,000) | (106,319,000) | (205,370,000) | (214,221,000)
Loss from early extinguishment of debt | 0 | 0 | 0 | 898,000
Depreciation and amortization expense | (181,416,000) | (182,078,000) | (357,302,000) | (355,578,000)
Transaction costs | (496,000) | (751,000) | (496,000) | (1,082,000)
General and administrative expense | (34,665,000) | (38,405,000) | (77,859,000) | (83,364,000)
Gains (losses) from investments in securities | 4,716,000 | (2,275,000) | 6,978,000 | (3,934,000)
Other Income - assignment fee | (6,624,000) | 0 | (6,624,000) | 0
Interest and other income (loss) | (1,195,000) | (1,452,000) | (2,423,000) | (2,620,000)
Gains on sales of real estate | (99,608,000) | (7,756,000) | (122,992,000) | (7,756,000)
Income (loss) from unconsolidated joint ventures | 54,000 | 1,373,000 | (2,135,000) | (3,852,000)
Boston Properties Limited Partnership | Segment Reconciling Items |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Net income attributable to the company's common shareholders / unitholders | 253,788,000 | 125,846,000 | 415,617,000 | 231,619,000
Preferred Stock Redemption Charge | 0 | 0 |  | 6,412,000
Preferred dividends / distributions | 0 | 0 | 0 | 2,560,000
Noncontrolling interest in property partnerships | 18,546,000 | 17,164,000 | 36,095,000 | 33,631,000
Interest expense | 104,142,000 | 106,319,000 | 205,370,000 | 214,221,000
Loss from early extinguishment of debt | 0 | 0 | 0 | 898,000
Depreciation and amortization expense | 181,416,000 | 182,078,000 | 357,302,000 | 355,578,000
Transaction costs | 496,000 | 751,000 | 496,000 | 1,082,000
Operating expense | 3,239,000 | 2,655,000 | 7,304,000 | 6,160,000
General and administrative expense | 34,665,000 | 38,405,000 | 77,859,000 | 83,364,000
Gains (losses) from investments in securities | (4,716,000) | 2,275,000 | (6,978,000) | 3,934,000
Other Income - assignment fee | 6,624,000 | 0 | 6,624,000 | 0
Interest and other income (loss) | 1,195,000 | 1,452,000 | 2,423,000 | 2,620,000
Gains on sales of real estate | 99,608,000 | 7,756,000 | 122,992,000 | 7,756,000
Income (loss) from unconsolidated joint ventures | (54,000) | (1,373,000) | 2,135,000 | 3,852,000
Other revenue | 3,239,000 | 2,655,000 | 7,304,000 | 6,160,000
Company's share of Net Operating Income | 471,890,000 | 432,299,000 | 931,472,000 | 856,665,000
Management Service [Member] |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Other revenue | (6,354,000) | (7,284,000) | (12,185,000) | (14,087,000)
Management Service [Member] | Segment Reconciling Items |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Other revenue | 6,354,000 | 7,284,000 | 12,185,000 | 14,087,000
Management Service [Member] | Boston Properties Limited Partnership |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Other revenue | (6,354,000) | (7,284,000) | (12,185,000) | (14,087,000)
Management Service [Member] | Boston Properties Limited Partnership | Segment Reconciling Items |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Other revenue | 6,354,000 | 7,284,000 | 12,185,000 | 14,087,000
Noncontrolling interest - property partnerships [Member] |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Company's share of net operating income from joint ventures | 47,862,000 | 46,287,000 | 94,917,000 | 90,663,000
Noncontrolling interest - property partnerships [Member] | Segment Reconciling Items |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Company's share of net operating income from joint ventures | 47,862,000 | 46,287,000 | 94,917,000 | 90,663,000
Noncontrolling interest - property partnerships [Member] | Boston Properties Limited Partnership | Segment Reconciling Items |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Company's share of net operating income from joint ventures | $ 47,862,000 | $ 46,287,000 | $ 94,917,000 | $ 90,663,000

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