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Other Non-Current Assets (Information) (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Notes to Consolidated Financial Statements [Abstract]    
Non-current inventories $ 152 $ 117
Derivative designated as a cash flow hedge 115 57
Surplus in employees' defined benefit plans [1] 91 78
Investments in equity-accounted investees 27 29
Other 8 5
Total other non-current assets $ 393 $ 286
[1] See Note 16.