Business Segment Information - Schedule of Total Assets by Consolidated Hotels, Reconciled To Condensed Combined Consolidated Amounts (Detail) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Segment Reporting Asset Reconciling Item [Line Items]
Total assets	$ 11,277	$ 11,290
Consolidated Hotels [Member]
Segment Reporting Asset Reconciling Item [Line Items]
Total assets	11,228	11,236
All Other [Member]
Segment Reporting Asset Reconciling Item [Line Items]
Total assets	$ 49	$ 54