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Noncontrolling Interests (Narrative) (Details) - Boston Properties Limited Partnership | Jun. 30, 2022 shares
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OP Units [Member] |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |
Noncontrolling Interest, Outstanding | 16,539,178
LTIP Units [Member] |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |
Noncontrolling Interest, Outstanding | 1,685,357
2012 OPP and 2013-2019 MYLTIP |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |
Noncontrolling Interest, Outstanding | 466,233
MYLTIP 2020 [Member] |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |
Noncontrolling Interest, Outstanding | 203,278
MYLTIP 2021 |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |
Noncontrolling Interest, Outstanding | 351,218
MYLTIP 2022 |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |
Noncontrolling Interest, Outstanding | 253,627

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