Cash, Cash Equivalents and Restricted Cash, Investments and Fair Value Measurements - Schedule of Financial Assets Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Fair value measurements
Cash and cash equivalents	$ 1,304	$ 1,322
Short-term investments	39
Total	1,347	1,355
Investment securities
Fair value measurements
Short-term investments	9	29
Certificate of deposit
Fair value measurements
Short-term investments	30
Cash
Fair value measurements
Cash and cash equivalents	421	407
Cash equivalents
Fair value measurements
Cash and cash equivalents	883	915
Certificate of deposit
Fair value measurements
Prepaid expenses and other current assets	4	4
Level 1
Fair value measurements
Cash and cash equivalents	1,304	1,322
Short-term investments	30
Total	1,338	1,326
Level 1 | Investment securities
Fair value measurements
Short-term investments	0	0
Level 1 | Certificate of deposit
Fair value measurements
Short-term investments	30
Level 1 | Cash
Fair value measurements
Cash and cash equivalents	421	407
Level 1 | Cash equivalents
Fair value measurements
Cash and cash equivalents	883	915
Level 1 | Certificate of deposit
Fair value measurements
Prepaid expenses and other current assets	4	4
Level 2
Fair value measurements
Short-term investments	9
Total	9	29
Level 2 | Investment securities
Fair value measurements
Short-term investments	9	29
Level 2 | Certificate of deposit
Fair value measurements
Short-term investments	0
Level 2 | Certificate of deposit
Fair value measurements
Prepaid expenses and other current assets	0	0
Level 3
Fair value measurements
Short-term investments	0
Total	0	0
Level 3 | Investment securities
Fair value measurements
Short-term investments	0	0
Level 3 | Certificate of deposit
Fair value measurements
Short-term investments	0
Level 3 | Certificate of deposit
Fair value measurements
Prepaid expenses and other current assets	$ 0	$ 0