Acquisitions, Dispositions and Assets Held for Sale - Additional Information (Detail) $ / shares in Units, shares in Millions, R$ in Millions, $ in Millions	1 Months Ended		12 Months Ended			24 Months Ended
	Nov. 30, 2019 USD ($)	May 31, 2018 USD ($)	Dec. 31, 2020 USD ($) shares	Dec. 31, 2019 USD ($) Hotel	Dec. 31, 2018 USD ($) Hotel	Dec. 31, 2019 USD ($) Hotel	Feb. 29, 2020 USD ($)	Feb. 29, 2020 BRL (R$)	Sep. 17, 2019 $ / shares	May 05, 2019 $ / shares
Business Acquisition [Line Items]
Acquisition costs			$ 10	$ 70
Operating income			(1,202)	426	$ 504
Net income			(1,440)	306	472
Gross proceeds on sale of hotel portfolio properties			208	436	379
Net gain on selling cost of hotel portfolio properties			63	$ 19	98
Reclassification of currency translation adjustment from accumulated other comprehensive loss to earnings on disposition of hotel portfolio properties					$ 31
Number of hotel portfolio properties sold | Hotel				7	12	7
Hilton Sao Paulo Morumbi [Member]
Business Acquisition [Line Items]
Gross sale price of disposal							$ 118	R$ 500
Hilton Sao Paulo Morumbi [Member]
Business Acquisition [Line Items]
Reclassification of currency translation adjustment from accumulated other comprehensive loss to earnings on disposition of hotel portfolio properties			$ 7
Conrad Dublin [Member]
Business Acquisition [Line Items]
Gross proceeds on sale of hotel portfolio properties	$ 128
Pro-rata share amount before customary closing adjustments	61
Net gain on sale of hotel portfolio properties	$ 44
Hilton Berlin [Member]
Business Acquisition [Line Items]
Reclassification of currency translation adjustment from accumulated other comprehensive loss to earnings on disposition of hotel portfolio properties		$ 8
Gross proceeds on sale of hotel portfolio properties		375
Pro-rata share amount before customary closing adjustments		151
Net gain on sale of hotel portfolio properties		$ 107
Chesapeake Lodging Trust [Member]
Business Acquisition [Line Items]
Percentage of ownership interest in properties			100.00%
Total consideration			$ 2,000
Business acquisition, consideration transferred number of shares issued | shares			37.8
Business acquisition,par value per common share | $ / shares									$ 25.88	$ 0.01
Cash issued for acquisition			$ 1,013
Acquisition costs			9	$ 70
Revenue recognized						$ 156
Operating income						20
Net income						$ 16
Chesapeake Lodging Trust [Member] | Common Stock [member]
Business Acquisition [Line Items]
Shares issued for acquisition			$ 978