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Share and Unit-Based Plans - LTIP units granted (Details)	9 Months Ended
	Sep. 30, 2020 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	552,866
January 1, 2020 | Service-based | First vesting period
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	154,158
Fair value per LTIP unit (in dollars per share) | $ / shares	$ 26.92
January 1, 2020 | Market-indexed | First vesting period
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	321,940
Fair value per LTIP unit (in dollars per share) | $ / shares	$ 27.80
March 1, 2020 | Service-based | Second vesting period
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	39,176
Fair value per LTIP unit (in dollars per share) | $ / shares	$ 20.42
March 1, 2020 | Market-indexed | Second vesting period
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	37,592
Fair value per LTIP unit (in dollars per share) | $ / shares	$ 21.28

X

- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(1)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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