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Acquisitions	6 Months Ended
Acquisitions	Jun. 30, 2019
Asset Acquisitions [Abstract]
Acquisitions	ACQUISITIONS In the 2019 first quarter, we accelerated our option to acquire our partner’s remaining interests in two joint ventures. As a result of the transaction, we recognized an indefinite-lived brand asset for AC Hotels by Marriott of $156 million and management and franchise contract assets, with a weighted-average term of 24 years, totaling $34 million.