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Taxes on Income (Items Recorded in Equity) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Notes to Consolidated Financial Statements [Abstract]      
Actuarial gains from defined benefit plan $ (6) $ 10 $ (3)
Change in investments at fair value through other comprehensive income 0 (1) 0
Taxes in respect of exchange rate differences on equity loan to a subsidiary included in translation adjustment (3) 1 2
Tax recorded in other comprehensive income $ (9) $ 10 $ (1)