Assets and Liabilities Measured at Fair Value - Schedule of Assets Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Money market funds and other	$ 221	$ 188
Investments of insurance subsidiaries	587	564
Less amounts classified as current assets	(104)	(87)
Asset fair value	483	477
Debt Securities [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt securities	366	376
Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1) [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Money market funds and other	221	188
Investments of insurance subsidiaries	221	188
Less amounts classified as current assets	(104)	(87)
Asset fair value	117	101
Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investments of insurance subsidiaries	366	376
Asset fair value	366	376
Significant Other Observable Inputs (Level 2) [Member] | Debt Securities [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt securities	$ 366	$ 376