Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

Transactions with Unconsolidated Affiliates (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Member of Unconsolidated Joint Venture
Related Party Transaction [Line Items]
Royalty and marketing and reservation system fees	$ 6.4	$ 4.1	$ 10.6	$ 7.0
Receivables	3.6		3.6		$ 2.7
Joint Venture Partner
Related Party Transaction [Line Items]
Fees earned and payroll costs reimbursed from marketing services arrangement	$ 0.6	$ 0.3	$ 0.9	$ 0.5