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Assets and Liabilities Measured at Fair Value - Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Millions | Jun. 30, 2022 | Dec. 31, 2021
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Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Assets, Fair Value Disclosure | $ 493 | $ 541
Less amounts classified as current assets | (114) | (103)
Investments of insurance subsidiaries, noncurrent | 379 | 438
Debt Securities [Member] |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Debt Securities, Available-for-sale Securities | 387 | 416
Money Market Funds and Other [Member] |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Assets, Fair Value Disclosure | 106 | 125
Interest Rate Swaps [Member] |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Derivative Liability | 1 | 8
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] |  |
Assets, Fair Value Disclosure | 106 | 125
Less amounts classified as current assets | (102) | (103)
Investments of insurance subsidiaries, noncurrent | 4 | 22
Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1) [Member] | Money Market Funds and Other [Member] |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Assets, Fair Value Disclosure | 106 | 125
Significant Other Observable Inputs (Level 2) [Member] |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Assets, Fair Value Disclosure | 387 | 416
Less amounts classified as current assets | (12) |
Investments of insurance subsidiaries, noncurrent | 375 | 416
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, Available-for-sale Securities | 387 | 416
Significant Other Observable Inputs (Level 2) [Member] | Interest Rate Swaps [Member] |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Derivative Liability | $ 1 | $ 8

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