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Other Non-Current Assets - Other Non-Current Assets (Detail) - USD ($) $ in Millions | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Statement of Financial Position [Abstract] |  |
Available-for-sale equity securities | $ 11 | $ 11
Trading equity securities | 9 | 8
Long-term State receivables | 417 | 388
Long-term receivables from third parties | 1 | 1
Prepaid for pension | 1 |
Deposits and other non-current assets | 36 | 26
Total | $ 475 | $ 434

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