CONSOLIDATED BALANCE SHEETS (PARENTHETICAL) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Amortized cost of available-for-sale debt securities, current	$ 25	$ 500
Accounts receivable, net, allowance for expected credit losses, current	101	166
Prepaid expenses, net, allowance for expected credit losses, current	29	22
Amortized cost of available-for-sale debt securities, noncurrent		225
Other assets, net, allowance for expected credit losses, noncurrent	$ 18	$ 33
Common stock, par value (in dollars per share)	$ 0.008	$ 0.008
Common stock, authorized shares (in shares)	1,000,000,000	1,000,000,000
Common stock, shares issued (in shares)	63,584,444	63,406,451
Treasury stock, shares (in shares)	22,518,391	22,446,897