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Fair Value of Financial Instruments - Summary of Fair Value Measurement Assets and Liabilities Measured on Recurring Basis (Detail) - USD ($) $ in Millions | Sep. 30, 2021 | Dec. 31, 2020
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Derivatives Designated as Hedge Instruments [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total | $ (17) |
Derivatives Not Designated as Hedge Instruments [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total |  | $ (51)
Foreign currency contracts |  | (9)
Net Investment Hedges [Member] | Derivatives Designated as Hedge Instruments [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative asset | 6 |
Interest Rate Swaps [Member] | Derivatives Designated as Hedge Instruments [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative liability | (22) | (35)
Cross Currency Swaps [Member] | Derivatives Designated as Hedge Instruments [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative asset | 3 |
Cross Currency Swaps [Member] | Net Investment Hedges [Member] | Derivatives Designated as Hedge Instruments [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative liability | (6) |
Contingent Consideration Obligations [Member] | Derivatives Designated as Hedge Instruments [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Contingent consideration obligations | (4) |
Contingent Consideration Obligations [Member] | Derivatives Not Designated as Hedge Instruments [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Contingent consideration obligations |  | (7)
Fair Value, Inputs, Level 2 [Member] | Derivatives Designated as Hedge Instruments [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total | (13) |
Fair Value, Inputs, Level 2 [Member] | Derivatives Not Designated as Hedge Instruments [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total |  | (44)
Foreign currency contracts |  | (9)
Fair Value, Inputs, Level 2 [Member] | Net Investment Hedges [Member] | Derivatives Designated as Hedge Instruments [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative asset | 6 |
Fair Value, Inputs, Level 2 [Member] | Interest Rate Swaps [Member] | Derivatives Designated as Hedge Instruments [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative liability | (22) | (35)
Fair Value, Inputs, Level 2 [Member] | Cross Currency Swaps [Member] | Derivatives Designated as Hedge Instruments [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative asset | 3 |
Fair Value, Inputs, Level 3 [Member] | Derivatives Designated as Hedge Instruments [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total | (4) |
Fair Value, Inputs, Level 3 [Member] | Derivatives Not Designated as Hedge Instruments [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total |  | (7)
Fair Value, Inputs, Level 3 [Member] | Contingent Consideration Obligations [Member] | Derivatives Designated as Hedge Instruments [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Contingent consideration obligations | $ (4) |
Fair Value, Inputs, Level 3 [Member] | Contingent Consideration Obligations [Member] | Derivatives Not Designated as Hedge Instruments [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Contingent consideration obligations |  | $ (7)

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