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Noncontrolling Interests (Narrative) (Details) - Boston Properties Limited Partnership | Jun. 30, 2018 shares
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Noncontrolling Interests [Member] |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |
Operating Partnership (OP) Units (in shares) | 16,831,182
Long-Term Incentive Plan (LTIP) Units (in shares) | 992,387
OPP Units 2012 [Member] |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |
Outperformance awards in LTIP Units (in shares) | 118,067
2013 MYLTIP [Member] |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |
2013 MYLTIP (in units) | 68,889
2014 MYLTIP [Member] |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |
2014 MYLTIP (in units) | 23,187
2015 MYLTIP [Member] |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |
2015 MYLTIPS (in units) | 28,724
2016 MYLTIP [Member] |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |
2016 MYLTIPs (in units) | 471,579
2017 MYLTIP [Member] |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |
2017 MYLTIP (in units) | 398,871
2018 MYLTIP [Member] |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |
2018 MYLTIP | 341,366

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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