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Other Non-Current Assets - Other Non-Current Assets (Detail) - USD ($)
$ in Millions
Dec. 31, 2016
Dec. 31, 2015
Statement of Financial Position [Abstract]    
Available-for-sale equity securities $ 11 $ 11
Trading equity securities 8 8
Long-term State receivables 388 403
Long-term receivables from third parties 1 1
Prepaid for pension   8
Deposits and other non-current assets 26 28
Total $ 434 $ 459