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Taxes on Income (Items Recorded in Equity) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Notes to Consolidated Financial Statements [Abstract]      
Actuarial gains from defined benefit plan $ 10 $ (3) $ 3
Change in investments at fair value through other comprehensive income (1) 0 5
Taxes in respect of exchange rate differences on equity loan to a subsidiary included in translation adjustment 1 2 (5)
Tax recorded in other comprehensive income $ 10 $ (1) $ 3