Assets Held for Sale and Disposals - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Gain on sale of assets, net	$ 1	$ 1	$ 143
Hilton Durban [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Sale price of disposal	33
Cash deposit, held in escrow as earnest money for disposal	$ 3
Waldorf Astoria New York [Member] | Consolidated hotels [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Sale price of disposal			1,950
Repaid in full existing, mortgage loan secured			525
Gain on sale of assets, net			143
Goodwill reduction on sale of assets			185
Waldorf Astoria New York [Member] | Consolidated hotels [Member] | Other Gain (Loss), Net [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Reduction in remaining carrying amount of debt issuance costs			$ 6