The value (monetary amount) of the award the plaintiff seeks in the legal matter.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 9
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14557-108349

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14435-108349

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349

Name:	us-gaap_LossContingencyDamagesSoughtValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Commitments and Contingencies - Pension Trust Litigation (Details) $ in Millions	3 Months Ended
	Mar. 31, 2016 USD ($) property	Dec. 31, 2020 USD ($) property	Mar. 31, 2017 hotel
Loss Contingencies [Line Items]
Number of Real Estate Properties \| property		28
Withdrawal liability \| $	$ 8.3
Loss contingency accrual \| $		$ 1.8
InterContinental Hotels Group PLC
Loss Contingencies [Line Items]
Number of Real Estate Properties \| hotel			3
Wyndham Hotel Group
Loss Contingencies [Line Items]
Number of Real Estate Properties \| property	1