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Financial Instruments and Risk Management - Schedule of Financial Assets (Liabilities) Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Millions | Dec. 31, 2016 | Dec. 31, 2015
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Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Contingent consideration on business combinations | $ (12) |
Total | 299 | $ 335
Derivative Financial Instruments, Liabilities [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative instruments | (43) | (24)
Derivative Financial Instruments, Liabilities [Member] | Not Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative instruments | (2) | (1)
U.S. Treasury Bonds/Bills [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities issued by foreign governments | 335 | 335
Equity Securities [Member] | Available-for-Sale Securities [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities issued by foreign governments | 11 | 11
Equity Securities [Member] | Held-for-Trading Securities [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities issued by foreign governments | 8 | 8
Derivative Financial Instruments, Assets [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative instruments | 1 | 5
Derivative Financial Instruments, Assets [Member] | Not Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative instruments | 1 | 1
Fair Value, Inputs, Level 1 [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total | 354 | 354
Fair Value, Inputs, Level 1 [Member] | U.S. Treasury Bonds/Bills [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities issued by foreign governments | 335 | 335
Fair Value, Inputs, Level 1 [Member] | Equity Securities [Member] | Available-for-Sale Securities [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities issued by foreign governments | 11 | 11
Fair Value, Inputs, Level 1 [Member] | Equity Securities [Member] | Held-for-Trading Securities [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities issued by foreign governments | 8 | 8
Fair Value, Inputs, Level 2 [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total | (43) | (19)
Fair Value, Inputs, Level 2 [Member] | Derivative Financial Instruments, Liabilities [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative instruments | (43) | (24)
Fair Value, Inputs, Level 2 [Member] | Derivative Financial Instruments, Liabilities [Member] | Not Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative instruments | (2) | (1)
Fair Value, Inputs, Level 2 [Member] | Derivative Financial Instruments, Assets [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative instruments | 1 | 5
Fair Value, Inputs, Level 2 [Member] | Derivative Financial Instruments, Assets [Member] | Not Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative instruments | 1 | $ 1
Fair Value, Inputs, Level 3 [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Contingent consideration on business combinations | (12) |
Total | $ (12) |

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