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CASH AND INVESTMENTS - Summary of Marketable Securities (Detail) - USD ($) $ in Millions | Jun. 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
Available-for-sale Securities, Amortized Cost Basis | 341 | 396
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax | 3 | 8
Available-for-sale Equity Securities, Accumulated Gross Unrealized Loss, before Tax | 0 | 0
Available-for-sale Securities, Current | 344 | 404
Total Amortized Cost | 343 | 398
Marketable Securities, Gross Unrealized Gain | 3 | 8
Marketable Securities, Gross Unrealized Loss | 0 | 0
Total Estimated Fair Value | 346 | 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] |  |
Available-for-sale Securities, Amortized Cost Basis | 208 | 181
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax | 1 | 3
Available-for-sale Equity Securities, Accumulated Gross Unrealized Loss, before Tax | 0 | 0
Available-for-sale Securities, Current | 209 | 184
Mortgage and asset-backed debt securities |  |
Schedule of Marketable Securities [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 1 | 30
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax | 0 | 1
Available-for-sale Equity Securities, Accumulated Gross Unrealized Loss, before Tax | 0 | 0
Available-for-sale Securities, Current | 1 | 31
Corporate debt securities |  |
Schedule of Marketable Securities [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 127 | 174
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax | 2 | 4
Available-for-sale Equity Securities, Accumulated Gross Unrealized Loss, before Tax | 0 | 0
Available-for-sale Securities, Current | 129 | 178
U.S. state and local municipal debt securities |  |
Schedule of Marketable Securities [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 2 | 0
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax | 0 | 0
Available-for-sale Equity Securities, Accumulated Gross Unrealized Loss, before Tax | 0 | 0
Available-for-sale Securities, Current | 2 | 0
Non-U.S. government debt securities |  |
Schedule of Marketable Securities [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 3 | 11
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax | 0 | 0
Available-for-sale Equity Securities, Accumulated Gross Unrealized Loss, before Tax | 0 | 0
Available-for-sale Securities, Current | $ 3 | $ 11

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