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Fair Value Measurements - Recurring (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Fair Value |  |  |
Asset impairments | $ 90 | $ 275 | $ 50
Unrealized gain (loss) on investment |  | (23) |
Unrealized gain (loss) on investment, tax |  | (8) |
Fair Value, Recurring [Member] |  |  |
Fair Value |  |  |
Total assets measured at fair value | 571 | 819 |
Fair Value, Recurring [Member] | Quoted Prices in Active Markets (Level 1) [Member] |  |  |
Fair Value |  |  |
Cash equivalents and money market funds | 56 | 327 |
Fair Value, Recurring [Member] | Quoted Prices in Active Markets (Level 1) [Member] | Equity securities [Member] |  |  |
Fair Value |  |  |
Investments | 70 | 61 |
Fair Value, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Available-for-sale securities [Member] |  |  |
Fair Value |  |  |
Investments | $ 445 | $ 431 |

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