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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