Financial Instruments and Fair Value Measurements - Additional Information (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Financial assets measured at fair value on a recurring basis	$ 0		$ 0		$ 0
Financial liabilities measured at fair value on a recurring basis	0		0		0
Cash and cash equivalents, consisted of cash deposits	775,000,000		$ 775,000,000		418,000,000
Derivative instruments not designated as hedging instruments, description of terms			We generally use forward contracts to reduce the effects of foreign currency exchange rate fluctuations on our cash flows. For the three and six months ended June 30, 2021 and 2020, our forward contracts have not been designated as hedges and generally had maturities of less than 90 days.
Foreign currency exchange contracts maturity period, maximum			90 days
Net gain (loss) related to forward contracts				$ 1,000,000
Earnings (losses) from equity method investment, net		$ (1,000,000)	$ (1,000,000)	(1,000,000)
Other Long-Term Assets
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Redeemable noncontrolling interest, settlement amount	20,000,000		$ 20,000,000
Percentage of notes receivable due in 5 years			50.00%
Percentage of notes receivable due in 10 years			50.00%
Allowance for credit loss under ASC 326		3,000,000		3,000,000
Net of accumulated allowance for credit losses, Carrying value	14,000,000		$ 14,000,000		14,000,000
Impairment loss of notes receivable	$ 0		$ 0
Chelsea Investment Holding Company PTE, Ltd
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Equity method investment, ownership percentage	40.00%		40.00%
Impairment loss on equity method investments	$ 0	$ 0	$ 0	$ 0
Chelsea Investment Holding Company PTE, Ltd | Non-Marketable Investments
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Equity method investments	$ 36,000,000		$ 36,000,000		$ 38,000,000
Customer Concentration Risk | Sales | Expedia
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Customer concentration risk					10.00%
Customer Concentration Risk | Sales | Booking
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Customer concentration risk					10.00%
Customer Concentration Risk | Sales | Expedia and Booking
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Customer concentration risk					25.00%