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Financial Instruments (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021
Fair Value, Liabilities Rollforward [Roll Forward] |  |
Fair value of contingent consideration at December 31, 2021 | $ 9 |
Additions: contingent consideration related to acquisitions completed during the period | 13 |
Reductions: payments of contingent consideration | (4) |
Changes in fair value (reflected in general and administrative expenses) | (6) |
Fair value of contingent consideration at December 31, 2022 | 12 |
Fair Value Measurements Recurring Member | Deferred compensation plan assets (included in other non-current assets) |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Deferred compensation plan assets (included in other non-current assets) | 1 | $ 1
Fair Value Measurements Recurring Member | Contingent consideration for acquisitions (included in accrued expenses and other current liabilities and other non-current liabilities) |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Contingent consideration for acquisitions (included in accrued expenses and other current liabilities and other non-current liabilities) | 12 | 9
Fair Value Measurements Recurring Member | Interest rate swap contracts |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Interest rate swaps (included in other current and non-current liabilities) |  | 46
Fair Value Measurements Recurring Member | Level I | Deferred compensation plan assets (included in other non-current assets) |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Deferred compensation plan assets (included in other non-current assets) | 1 | 1
Fair Value Measurements Recurring Member | Level I | Contingent consideration for acquisitions (included in accrued expenses and other current liabilities and other non-current liabilities) |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Contingent consideration for acquisitions (included in accrued expenses and other current liabilities and other non-current liabilities) | 0 | 0
Fair Value Measurements Recurring Member | Level I | Interest rate swap contracts |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Interest rate swaps (included in other current and non-current liabilities) |  | 0
Fair Value Measurements Recurring Member | Level II | Deferred compensation plan assets (included in other non-current assets) |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Deferred compensation plan assets (included in other non-current assets) | 0 | 0
Fair Value Measurements Recurring Member | Level II | Contingent consideration for acquisitions (included in accrued expenses and other current liabilities and other non-current liabilities) |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Contingent consideration for acquisitions (included in accrued expenses and other current liabilities and other non-current liabilities) | 0 | 0
Fair Value Measurements Recurring Member | Level II | Interest rate swap contracts |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Interest rate swaps (included in other current and non-current liabilities) |  | 46
Fair Value Measurements Recurring Member | Level III | Deferred compensation plan assets (included in other non-current assets) |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Deferred compensation plan assets (included in other non-current assets) | 0 | 0
Fair Value Measurements Recurring Member | Level III | Contingent consideration for acquisitions (included in accrued expenses and other current liabilities and other non-current liabilities) |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Contingent consideration for acquisitions (included in accrued expenses and other current liabilities and other non-current liabilities) | $ 12 | 9
Fair Value Measurements Recurring Member | Level III | Interest rate swap contracts |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Interest rate swaps (included in other current and non-current liabilities) |  | $ 0

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