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CASH AND INVESTMENTS - Investments Measured at Fair Value on a Recurring Basis (Detail) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Millions | Sep. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | $ 424 | $ 525
Marketable securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 402 | 503
Marketable securities | U.S. government and agency debt securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 183 | 193
Marketable securities | Mortgage and asset-backed debt securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 35 | 47
Marketable securities | Corporate debt securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 171 | 245
Marketable securities | Equity securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 2 | 2
Marketable securities | Non-U.S. government debt securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 11 | 16
Other Non-Current Investments |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 22 | 22
Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 205 | 214
Quoted Prices in Active Markets for Identical Assets (Level 1) | Marketable securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 183 | 193
Quoted Prices in Active Markets for Identical Assets (Level 1) | Marketable securities | U.S. government and agency debt securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 183 | 193
Quoted Prices in Active Markets for Identical Assets (Level 1) | Marketable securities | Mortgage and asset-backed debt securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 0 | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Marketable securities | Corporate debt securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 0 | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Marketable securities | Equity securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 0 | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Marketable securities | Non-U.S. government debt securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 0 | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Other Non-Current Investments |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 22 | 21
Significant Other Observable Inputs (Level 2) |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 219 | 310
Significant Other Observable Inputs (Level 2) | Marketable securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 219 | 310
Significant Other Observable Inputs (Level 2) | Marketable securities | U.S. government and agency debt securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 0 | 0
Significant Other Observable Inputs (Level 2) | Marketable securities | Mortgage and asset-backed debt securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 35 | 47
Significant Other Observable Inputs (Level 2) | Marketable securities | Corporate debt securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 171 | 245
Significant Other Observable Inputs (Level 2) | Marketable securities | Equity securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 2 | 2
Significant Other Observable Inputs (Level 2) | Marketable securities | Non-U.S. government debt securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 11 | 16
Significant Other Observable Inputs (Level 2) | Other Non-Current Investments |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 0 | 0
Significant Unobservable Inputs (Level 3) |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 0 | 1
Significant Unobservable Inputs (Level 3) | Marketable securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 0 | 0
Significant Unobservable Inputs (Level 3) | Marketable securities | U.S. government and agency debt securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 0 | 0
Significant Unobservable Inputs (Level 3) | Marketable securities | Mortgage and asset-backed debt securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 0 | 0
Significant Unobservable Inputs (Level 3) | Marketable securities | Corporate debt securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 0 | 0
Significant Unobservable Inputs (Level 3) | Marketable securities | Equity securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 0 | 0
Significant Unobservable Inputs (Level 3) | Marketable securities | Non-U.S. government debt securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 0 | 0
Significant Unobservable Inputs (Level 3) | Other Non-Current Investments |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | $ 0 | $ 1

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