Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - Fair Value, Measurements, Recurring - USD ($) $ in Millions | Mar. 31, 2016 | Dec. 31, 2015 |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Fair value of assets measured on a recurring basis | | $ 1,093 | $ 1,670 |
Fair value of liabilities measured on a recurring basis | | 1,534 | 1,681 |
Short-term Investments | Equity Securities | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Fair value of assets measured on a recurring basis | | | 265 |
Short-term Investments | Fixed Income Securities | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Fair value of assets measured on a recurring basis | | | 85 |
Other current assets | Fixed Income Securities | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Fair value of assets measured on a recurring basis | | | 250 |
Other Assets | Equity Securities | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Fair value of assets measured on a recurring basis | | 171 | |
Other Assets | Fixed Income Securities | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Fair value of assets measured on a recurring basis | | 622 | 928 |
Other Assets | Interest Rate Swaps | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Fair value of assets measured on a recurring basis | | 296 | 128 |
Other Assets | Net Investment Hedges | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Fair value of assets measured on a recurring basis | | 4 | 13 |
Other Assets | Cross Currency Swaps | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Fair value of assets measured on a recurring basis | | | 1 |
Other Liabilities | Interest Rate Swaps | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Fair value of liabilities measured on a recurring basis | | 1 | 19 |
Other Liabilities | Cross Currency Swaps | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Fair value of liabilities measured on a recurring basis | | 1,411 | 1,638 |
Other Liabilities | Forward Interest Rate Swaps | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Fair value of liabilities measured on a recurring basis | | 118 | 24 |
Other Liabilities | Net Investment Hedges | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Fair value of liabilities measured on a recurring basis | | 2 | |
Other Current Liabilities | Cross Currency Swaps | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Fair value of liabilities measured on a recurring basis | | 2 | |
Level 1 | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Fair value of assets measured on a recurring basis | [1] | 171 | 515 |
Level 1 | Short-term Investments | Equity Securities | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Fair value of assets measured on a recurring basis | [1] | | 265 |
Level 1 | Other current assets | Fixed Income Securities | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Fair value of assets measured on a recurring basis | [1] | | 250 |
Level 1 | Other Assets | Equity Securities | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Fair value of assets measured on a recurring basis | [1] | 171 | |
Level 2 | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Fair value of assets measured on a recurring basis | [2] | 922 | 1,155 |
Fair value of liabilities measured on a recurring basis | [2] | 1,534 | 1,681 |
Level 2 | Short-term Investments | Fixed Income Securities | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Fair value of assets measured on a recurring basis | [2] | | 85 |
Level 2 | Other Assets | Fixed Income Securities | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Fair value of assets measured on a recurring basis | [2] | 622 | 928 |
Level 2 | Other Assets | Interest Rate Swaps | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Fair value of assets measured on a recurring basis | [2] | 296 | 128 |
Level 2 | Other Assets | Net Investment Hedges | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Fair value of assets measured on a recurring basis | [2] | 4 | 13 |
Level 2 | Other Assets | Cross Currency Swaps | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Fair value of assets measured on a recurring basis | [2] | | 1 |
Level 2 | Other Liabilities | Interest Rate Swaps | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Fair value of liabilities measured on a recurring basis | [2] | 1 | 19 |
Level 2 | Other Liabilities | Cross Currency Swaps | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Fair value of liabilities measured on a recurring basis | [2] | 1,411 | 1,638 |
Level 2 | Other Liabilities | Forward Interest Rate Swaps | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Fair value of liabilities measured on a recurring basis | [2] | 118 | $ 24 |
Level 2 | Other Liabilities | Net Investment Hedges | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Fair value of liabilities measured on a recurring basis | [2] | 2 | |
Level 2 | Other Current Liabilities | Cross Currency Swaps | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Fair value of liabilities measured on a recurring basis | [2] | $ 2 | |
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[1] | quoted prices in active markets for identical assets or liabilities | |
[2] | observable inputs other than quoted prices in active markets for identical assets and liabilities | |