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Financial Instruments - Additional Information (Detail) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 USD ($) Customer | Dec. 31, 2018 USD ($)
Derivative Instruments, Gain (Loss) [Line Items] |  |
Long-term debt due within one year | $ 106 | $ 201
Debt instrument maturity period | 1 year |
Book value of senior notes | $ 3,020 |
Sales Revenue, Net [Member] |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Number of largest customers | Customer | 6 |
Sales Revenue, Net [Member] | Customer Concentration Risk [Member] |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Percentage of sales to six largest customers | 77.00% | 77.00%
Fair Value, Inputs, Level 1 [Member] | Senior Notes [Member] |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Estimated fair value of notes payable | $ 3,200 |
Foreign Exchange Forward [Member] |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Foreign exchange forward contracts, gain recognized in other comprehensive loss |  | $ 70
Foreign exchange forward contracts, loss recognized in other comprehensive loss |  | $ 18

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