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Fair Value Measurements - Recurring (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Fair Value
Asset impairments	$ 275	$ 50	$ 8
Unrealized gain (loss) on investment	(23)
Unrealized gain (loss) on investment, tax	$ (8)
Available-for-sale securities [Member]
Fair Value
Investment maturity	10 years
Redeemable Preferred Stock [Member]
Fair Value
Asset impairments	$ 25
Fair Value, Measurements, Recurring [Member]
Fair Value
Total assets	819	693
Fair Value, Measurements, Recurring [Member] \| Quoted Prices in Active Markets (Level 1) [Member]
Fair Value
Cash equivalents and money market funds	327	240
Fair Value, Measurements, Recurring [Member] \| Quoted Prices in Active Markets (Level 1) [Member] \| Equity securities [Member]
Fair Value
Available-for-sale securities	61	37
Fair Value, Measurements, Recurring [Member] \| Significant Other Observable Inputs (Level 2) [Member] \| Available-for-sale securities [Member]
Fair Value
Available-for-sale securities	$ 431	360
Fair Value, Measurements, Recurring [Member] \| Significant Unobservable Inputs (Level 3) [Member] \| Redeemable Preferred Stock [Member]
Fair Value
Available-for-sale securities		$ 56