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CASH AND INVESTMENTS - Summary of Marketable Securities (Detail) - USD ($) $ in Millions | Sep. 30, 2021 | Dec. 31, 2020
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Schedule of Marketable Securities [Line Items] |  |
Debt Securities, Trading, Amortized Cost | $ 2 | $ 2
Trading Securities, Gross Unrealized Gain | 0 | 0
Trading Securities, Gross Unrealized Loss | 0 | 0
Debt Securities, Trading, and Equity Securities, FV-NI | 2 | 2
Debt Securities, Available-for-sale, Amortized Cost | 343 | 396
Debt Securities, Available-for-sale, Current | 346 | 404
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 0 | 0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 3 | 8
Total Amortized Cost | 345 | 398
Marketable Securities, Gross Unrealized Gain | 3 | 8
Marketable Securities, Gross Unrealized Loss | 0 | 0
Total Estimated Fair Value | 348 | 406
Equity securities |  |
Schedule of Marketable Securities [Line Items] |  |
Debt Securities, Trading, Amortized Cost | 2 | 2
Trading Securities, Gross Unrealized Gain | 0 | 0
Trading Securities, Gross Unrealized Loss | 0 | 0
Debt Securities, Trading, and Equity Securities, FV-NI | 2 | 2
U.S. government and agency debt securities |  |
Schedule of Marketable Securities [Line Items] |  |
Debt Securities, Available-for-sale, Amortized Cost | 222 | 181
Debt Securities, Available-for-sale, Current | 223 | 184
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 0 | 0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 1 | 3
Mortgage and asset-backed debt securities |  |
Schedule of Marketable Securities [Line Items] |  |
Debt Securities, Available-for-sale, Amortized Cost | 0 | 30
Debt Securities, Available-for-sale, Current | 0 | 31
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 0 | 0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 0 | 1
Corporate debt securities |  |
Schedule of Marketable Securities [Line Items] |  |
Debt Securities, Available-for-sale, Amortized Cost | 113 | 174
Debt Securities, Available-for-sale, Current | 115 | 178
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 0 | 0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 2 | 4
U.S. state and local municipal debt securities |  |
Schedule of Marketable Securities [Line Items] |  |
Debt Securities, Available-for-sale, Amortized Cost | 5 | 0
Debt Securities, Available-for-sale, Current | 5 | 0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 0 | 0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 0 | 0
Non-U.S. government debt securities |  |
Schedule of Marketable Securities [Line Items] |  |
Debt Securities, Available-for-sale, Amortized Cost | 3 | 11
Debt Securities, Available-for-sale, Current | 3 | 11
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 0 | 0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | $ 0 | $ 0

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