Fair Value Measures and Disclosures (Details) - USD ($) $ in Millions | Mar. 31, 2022 | Dec. 31, 2021 |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term marketable securities | $ 1,353 | $ 1,253 |
Long-term marketable securities | 643 | 650 |
Money market funds | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cash equivalents | 442 | 544 |
Corporate bonds | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term marketable securities | 162 | 141 |
Long-term marketable securities | 54 | 114 |
U.S. Treasury securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cash equivalents | 49 | 50 |
Short-term marketable securities | 897 | 670 |
Long-term marketable securities | 547 | 487 |
Commercial paper | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term marketable securities | 215 | 373 |
U.S. government agency securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term marketable securities | 79 | 69 |
Long-term marketable securities | 42 | 49 |
Fair Value, Recurring | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total | 2,487 | 2,497 |
Fair Value, Recurring | Money market funds | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cash equivalents | 442 | 544 |
Fair Value, Recurring | Corporate bonds | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term marketable securities | 162 | 141 |
Long-term marketable securities | 54 | 114 |
Fair Value, Recurring | U.S. Treasury securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cash equivalents | 49 | 50 |
Short-term marketable securities | 897 | 670 |
Long-term marketable securities | 547 | 487 |
Fair Value, Recurring | Commercial paper | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term marketable securities | 215 | 373 |
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 | 79 | 69 |
Long-term marketable securities | 42 | 49 |
Level 1 | Fair Value, Recurring | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total | 442 | 544 |
Level 1 | Fair Value, Recurring | Money market funds | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cash equivalents | 442 | 544 |
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 | U.S. Treasury securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cash equivalents | 0 | 0 |
Short-term marketable securities | 0 | 0 |
Long-term marketable securities | 0 | 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. 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 2 | Fair Value, Recurring | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total | 2,045 | 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 | Corporate bonds | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term marketable securities | 162 | 141 |
Long-term marketable securities | 54 | 114 |
Level 2 | Fair Value, Recurring | U.S. Treasury securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cash equivalents | 49 | 50 |
Short-term marketable securities | 897 | 670 |
Long-term marketable securities | 547 | 487 |
Level 2 | Fair Value, Recurring | Commercial paper | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term marketable securities | 215 | 373 |
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 | 79 | 69 |
Long-term marketable securities | 42 | 49 |
Level 3 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total | 0 | 0 |
Liabilities | 0 | 0 |
Level 3 | Fair Value, Recurring | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total | 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 | 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 | U.S. Treasury securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cash equivalents | 0 | 0 |
Short-term marketable securities | | 0 |
Long-term marketable securities | 0 | 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. 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 |