Fair Value Measures and Disclosures (Details) - USD ($) $ in Millions | Jun. 30, 2022 | Dec. 31, 2021 |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term marketable securities | $ 1,272 | $ 1,253 |
Long-term marketable securities | 495 | 650 |
Commercial paper | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cash equivalents | 10 | |
Short-term marketable securities | 97 | 373 |
U.S. Treasury securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cash equivalents | 52 | 50 |
Short-term marketable securities | 903 | 670 |
Long-term marketable securities | 416 | 487 |
U.S. government agency securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cash equivalents | 4 | |
Short-term marketable securities | 38 | 69 |
Long-term marketable securities | 47 | 49 |
Corporate bonds | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term marketable securities | 206 | 141 |
Long-term marketable securities | 26 | 114 |
Mutual Funds | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term marketable securities | 28 | |
Long-term marketable securities | 6 | |
Fair Value, Recurring | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Assets | 2,218 | 2,497 |
Fair Value, Recurring | Money market funds | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cash equivalents | 385 | 544 |
Fair Value, Recurring | U.S. Treasury securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cash equivalents | 52 | 50 |
Fair Value, Recurring | Commercial paper | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cash equivalents | 10 | |
Fair Value, Recurring | U.S. government agency securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cash equivalents | 4 | |
Fair Value, Recurring | Commercial paper | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term marketable securities | 97 | 373 |
Fair Value, Recurring | U.S. Treasury securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term marketable securities | 903 | 670 |
Long-term marketable securities | 416 | 487 |
Fair Value, Recurring | U.S. government agency securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term marketable securities | 38 | 69 |
Long-term marketable securities | 47 | 49 |
Fair Value, Recurring | Corporate bonds | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term marketable securities | 206 | 141 |
Long-term marketable securities | 26 | 114 |
Fair Value, Recurring | Mutual Funds | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term marketable securities | 28 | |
Long-term marketable securities | 6 | |
Level 1 | Fair Value, Recurring | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Assets | 419 | 544 |
Level 1 | Fair Value, Recurring | Money market funds | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cash equivalents | 385 | 544 |
Level 1 | Fair Value, Recurring | U.S. Treasury securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cash equivalents | 0 | 0 |
Level 1 | Fair Value, Recurring | Commercial paper | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cash equivalents | 0 | |
Level 1 | Fair Value, Recurring | U.S. government agency securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cash equivalents | 0 | |
Level 1 | Fair Value, Recurring | Commercial paper | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term marketable securities | 0 | 0 |
Level 1 | Fair Value, Recurring | U.S. Treasury securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term marketable securities | 0 | 0 |
Long-term marketable securities | 0 | 0 |
Level 1 | Fair Value, Recurring | U.S. government agency securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term marketable securities | 0 | 0 |
Long-term marketable securities | 0 | 0 |
Level 1 | Fair Value, Recurring | Corporate bonds | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term marketable securities | 0 | 0 |
Long-term marketable securities | 0 | 0 |
Level 1 | Fair Value, Recurring | Mutual Funds | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term marketable securities | 28 | |
Long-term marketable securities | 6 | |
Level 2 | Fair Value, Recurring | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Assets | 1,799 | 1,953 |
Level 2 | Fair Value, Recurring | Money market funds | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cash equivalents | 0 | 0 |
Level 2 | Fair Value, Recurring | U.S. Treasury securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cash equivalents | 52 | 50 |
Level 2 | Fair Value, Recurring | Commercial paper | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cash equivalents | 10 | |
Level 2 | Fair Value, Recurring | U.S. government agency securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cash equivalents | 4 | |
Level 2 | Fair Value, Recurring | Commercial paper | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term marketable securities | 97 | 373 |
Level 2 | Fair Value, Recurring | U.S. Treasury securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term marketable securities | 903 | 670 |
Long-term marketable securities | 416 | 487 |
Level 2 | Fair Value, Recurring | U.S. government agency securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term marketable securities | 38 | 69 |
Long-term marketable securities | 47 | 49 |
Level 2 | Fair Value, Recurring | Corporate bonds | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term marketable securities | 206 | 141 |
Long-term marketable securities | 26 | 114 |
Level 2 | Fair Value, Recurring | Mutual Funds | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term marketable securities | 0 | |
Long-term marketable securities | 0 | |
Level 3 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Assets | 0 | 0 |
Liabilities | 0 | 0 |
Level 3 | Fair Value, Recurring | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Assets | 0 | 0 |
Level 3 | Fair Value, Recurring | Money market funds | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cash equivalents | 0 | 0 |
Level 3 | Fair Value, Recurring | U.S. Treasury securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cash equivalents | 0 | 0 |
Level 3 | Fair Value, Recurring | Commercial paper | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cash equivalents | 0 | |
Level 3 | Fair Value, Recurring | U.S. government agency securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cash equivalents | 0 | |
Level 3 | Fair Value, Recurring | Commercial paper | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term marketable securities | 0 | 0 |
Level 3 | Fair Value, Recurring | U.S. Treasury securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term marketable securities | 0 | 0 |
Long-term marketable securities | 0 | 0 |
Level 3 | Fair Value, Recurring | U.S. government agency securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term marketable securities | 0 | 0 |
Long-term marketable securities | 0 | 0 |
Level 3 | Fair Value, Recurring | Corporate bonds | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term marketable securities | 0 | 0 |
Long-term marketable securities | 0 | $ 0 |
Level 3 | Fair Value, Recurring | Mutual Funds | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term marketable securities | 0 | |
Long-term marketable securities | $ 0 | |