Commitments and Contingencies - Restricted Cash Reserves (Details) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2016 USD ($) property	Dec. 31, 2020 USD ($) property	Dec. 31, 2018 USD ($)	Mar. 31, 2017 hotel
Restricted Cash and Cash Equivalents Items [Line Items]
Minimum restricted cash reserve escrows to be maintained as a percentage of the hotel's revenue		4.00%
Maximum restricted cash reserve escrows to be maintained as percentage of hotel's revenue		5.00%
Restricted cash reserves for future capital expenditures, real estate taxes and insurance | $		$ 3.9	$ 4.1
Lessor, Operating Lease, Reimbursement Of Rent | $		$ 0.5
Number Of Properties, Lease Expired, Next Fiscal Year		1
Number Of Properties, Lease Expired, Fiscal Year After The Next		24
Number Of Properties, Lease Expired, Fiscal Year More Than Two Years In The Future		1
Lessor, Operating Lease, Total Rent Abatement | $		$ 52.7
Number of Real Estate Properties		28
Withdrawal liability | $	$ 8.3
Loss contingency accrual | $		$ 1.8
InterContinental Hotels Group PLC
Restricted Cash and Cash Equivalents Items [Line Items]
Number of Real Estate Properties | hotel				3
InterContinental Hotels Group PLC | Disposals 2006
Restricted Cash and Cash Equivalents Items [Line Items]
Number of Real Estate Properties	2
Wyndham Hotel Group
Restricted Cash and Cash Equivalents Items [Line Items]
Number of Real Estate Properties	1