Other Income (Expense), Net - Summary of Other Income (Expense), Net (Details) - USD ($) $ in Millions		3 Months Ended	6 Months Ended
		Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Other Income And Expenses [Abstract]
Foreign currency exchange rates gains (losses), net	[1]	$ 1	$ (2)	$ 2
Earnings (losses) from equity method investment, net		(1)	(1)	(1)
Loss on sale of business	[2]	(5)		(5)
Other income (losses), net		(4)	2	(5)
Total		$ (9)	$ (1)	$ (9)

[1] Foreign currency exchange gains (losses), net, are generally related to foreign exchange transaction gains and losses due to required conversion from transaction currency to functional currency, partially offset by the foreign currency forward contract gains and losses.

[2] Related to loss on disposal on the sale of our SmarterTravel business during the three months ended June 30, 2020.