Contracts with Customers (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2022	Dec. 31, 2021
Disaggregation of Revenue [Line Items]
Accounts and notes receivable, net, allowance for credit losses	$ 195	$ 195	$ 187
Provision (reversal) for credit losses	(6)	27
Loyalty Program
Disaggregation of Revenue [Line Items]
Change in contract with customer liability		175
Contract with customer liability	6,646	6,646	6,471
Reclassification of deferred revenue to liability for guest loyalty program		191
Deferred revenue recognized		2,025
Deferred revenue
Disaggregation of Revenue [Line Items]
Change in contract with customer liability		(162)
Contract with customer liability	$ 1,365	1,365	$ 1,527
Deferred revenue recognized		$ 256