Fair Value Measures and Disclosures - Financial Instruments at Fair Value (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Short-term marketable securities
Short-term marketable securities	$ 1,544	$ 1,253
Long-term marketable securities
Long-term marketable securities	397	650
U.S. Treasury securities
Cash equivalents
Cash equivalents		50
Short-term marketable securities
Short-term marketable securities	957	670
Long-term marketable securities
Long-term marketable securities	208	487
Commercial paper
Cash equivalents
Cash equivalents	3
Short-term marketable securities
Short-term marketable securities	306	373
Corporate bonds
Short-term marketable securities
Short-term marketable securities	205	141
Long-term marketable securities
Long-term marketable securities	145	114
U.S. government agency securities
Short-term marketable securities
Short-term marketable securities	76	69
Long-term marketable securities
Long-term marketable securities	44	49
Fair Value, Recurring
Long-term marketable securities
Total	2,830	2,497
Fair Value, Recurring | Money market funds
Cash equivalents
Cash equivalents	886	544
Fair Value, Recurring | U.S. Treasury securities
Cash equivalents
Cash equivalents		50
Fair Value, Recurring | Commercial paper
Cash equivalents
Cash equivalents	3
Fair Value, Recurring | U.S. Treasury securities
Short-term marketable securities
Short-term marketable securities	957	670
Long-term marketable securities
Long-term marketable securities	208	487
Fair Value, Recurring | Commercial paper
Short-term marketable securities
Short-term marketable securities	306	373
Fair Value, Recurring | Corporate bonds
Short-term marketable securities
Short-term marketable securities	205	141
Long-term marketable securities
Long-term marketable securities	145	114
Fair Value, Recurring | U.S. government agency securities
Short-term marketable securities
Short-term marketable securities	76	69
Long-term marketable securities
Long-term marketable securities	44	49
Level 1 | Fair Value, Recurring
Long-term marketable securities
Total	886	544
Level 1 | Fair Value, Recurring | Money market funds
Cash equivalents
Cash equivalents	886	544
Level 1 | Fair Value, Recurring | U.S. Treasury securities
Cash equivalents
Cash equivalents		0
Level 1 | Fair Value, Recurring | Commercial paper
Cash equivalents
Cash equivalents	0
Level 1 | Fair Value, Recurring | U.S. Treasury securities
Short-term marketable securities
Short-term marketable securities	0	0
Long-term marketable securities
Long-term marketable securities	0	0
Level 1 | Fair Value, Recurring | Commercial paper
Short-term marketable securities
Short-term marketable securities	0	0
Level 1 | Fair Value, Recurring | Corporate bonds
Short-term marketable securities
Short-term marketable securities	0	0
Long-term marketable securities
Long-term marketable securities	0	0
Level 1 | Fair Value, Recurring | U.S. government agency securities
Short-term marketable securities
Short-term marketable securities	0	0
Long-term marketable securities
Long-term marketable securities	0	0
Level 2 | Fair Value, Recurring
Long-term marketable securities
Total	1,944	1,953
Level 2 | Fair Value, Recurring | Money market funds
Cash equivalents
Cash equivalents	0	0
Level 2 | Fair Value, Recurring | U.S. Treasury securities
Cash equivalents
Cash equivalents		50
Level 2 | Fair Value, Recurring | Commercial paper
Cash equivalents
Cash equivalents	3
Level 2 | Fair Value, Recurring | U.S. Treasury securities
Short-term marketable securities
Short-term marketable securities	957	670
Long-term marketable securities
Long-term marketable securities	208	487
Level 2 | Fair Value, Recurring | Commercial paper
Short-term marketable securities
Short-term marketable securities	306	373
Level 2 | Fair Value, Recurring | Corporate bonds
Short-term marketable securities
Short-term marketable securities	205	141
Long-term marketable securities
Long-term marketable securities	145	114
Level 2 | Fair Value, Recurring | U.S. government agency securities
Short-term marketable securities
Short-term marketable securities	76	69
Long-term marketable securities
Long-term marketable securities	44	49
Level 3 | Fair Value, Recurring
Long-term marketable securities
Total	0	0
Level 3 | Fair Value, Recurring | Money market funds
Cash equivalents
Cash equivalents	0	0
Level 3 | Fair Value, Recurring | U.S. Treasury securities
Cash equivalents
Cash equivalents		0
Level 3 | Fair Value, Recurring | Commercial paper
Cash equivalents
Cash equivalents	0
Level 3 | Fair Value, Recurring | U.S. Treasury securities
Short-term marketable securities
Short-term marketable securities	0	0
Long-term marketable securities
Long-term marketable securities	0	0
Level 3 | Fair Value, Recurring | Commercial paper
Short-term marketable securities
Short-term marketable securities	0	0
Level 3 | Fair Value, Recurring | Corporate bonds
Short-term marketable securities
Short-term marketable securities	0	0
Long-term marketable securities
Long-term marketable securities	0	0
Level 3 | Fair Value, Recurring | U.S. government agency securities
Short-term marketable securities
Short-term marketable securities	0	0
Long-term marketable securities
Long-term marketable securities	$ 0	$ 0