Dispositions - Additional Information (Detail) $ in Millions			12 Months Ended
	Jan. 01, 2019 USD ($)	Sep. 21, 2018 USD ($)	Dec. 31, 2018 USD ($) Hotel	Dec. 31, 2017 USD ($) Hotel	Dec. 31, 2016 USD ($) Hotel
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Number of hotels sold | Hotel			4	4	10
Gain on sale of assets			$ 279	$ 99	$ 243
Income tax provision			150	80	40
Proceeds from sales of assets, net			1,605	481	$ 465
FF&E replacement fund retained			213	195
Long Term Capital Gain
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Income tax provision			77
Retail
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Gain on sale of assets		$ 386
Proceeds from sales of assets, net		442
Future real estate tax rebates liability		$ 35
Westin New York Grand Central | Subsequent Event
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Proceeds from sales of assets, net	$ 302
FF&E replacement fund retained	$ 20
Australia | Hilton Melbourne South Wharf | Foreign Capital Gain
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Income tax provision				$ 17
United States | Retail | Long Term Capital Gain
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Income tax provision			$ 16