Other Income (Expense), Net - Summary of Other Income (Expense), Net (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020
Other Income And Expenses [Abstract]
Foreign currency exchange gain (loss), net	[1]	$ 1	$ 2	$ 4
Earnings (losses) from equity method investment, net		(1)		(2)
Loss on sale/disposal of business	[2]	(1)		(6)
Other, net		$ 1		(5)
Total			$ 2	$ (9)

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

[2] Primarily related to loss on disposal on the sale of our SmarterTravel business in June 2020.