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Fair Value Measurement - Summary of Financial Items Carried at Fair Value (Detail) - USD ($) $ in Millions | Mar. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Contingent consideration | [1] | $ (405) | $ (507)
Total |  | 1,704 | 1,338
Asset Derivatives - Options and Forward Contracts [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivatives |  | 32 | 18
Liabilities Derivatives - Interest Rate and Cross Currency Swaps [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivatives |  | (28) | (50)
Liabilities Derivatives Options and Forward Contracts [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivatives |  | (11) | (26)
Money Markets [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Cash and cash equivalents |  | 319 | 203
Cash, Deposits and Other [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Cash and cash equivalents |  | 1,654 | 1,579
Equity Securities [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Investment in securities |  | 52 | 51
Other, Mainly Debt Securities [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Investment in securities |  | 15 | 12
Asset Derivatives - Cross Currency Swaps [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivatives |  | 76 | 58
Level 1 [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Total |  | 2,027 | 1,835
Level 1 [Member] | Money Markets [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Cash and cash equivalents |  | 319 | 203
Level 1 [Member] | Cash, Deposits and Other [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Cash and cash equivalents |  | 1,654 | 1,579
Level 1 [Member] | Equity Securities [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Investment in securities |  | 52 | 51
Level 1 [Member] | Other, Mainly Debt Securities [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Investment in securities |  | 2 | 2
Level 2 [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Total |  | 69 | 0
Level 2 [Member] | Asset Derivatives - Options and Forward Contracts [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivatives |  | 32 | 18
Level 2 [Member] | Liabilities Derivatives - Interest Rate and Cross Currency Swaps [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivatives |  | (28) | (50)
Level 2 [Member] | Liabilities Derivatives Options and Forward Contracts [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivatives |  | (11) | (26)
Level 2 [Member] | Asset Derivatives - Cross Currency Swaps [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivatives |  | 76 | 58
Level 3 [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Contingent consideration | [1] | (405) | (507)
Total |  | (392) | (497)
Level 3 [Member] | Other, Mainly Debt Securities [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Investment in securities |  | $ 13 | $ 10
[1] | Contingent consideration represents liabilities recorded at fair value in connection with acquisitions.

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