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Other Non-Current Assets (Information) (Details) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Notes to Consolidated Financial Statements [Abstract]    
Lease rights $ 102 $ 106
Non-current inventories 99 106
Surplus in defined benefit plan 73 89
Long-term loan 59 0
Derivatives 15 64
Other 9 8
Total other non-current assets $ 357 $ 373