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Equity (Share-based Payments to Employees, Non-marketable Options, Number of Options Vested) (Details)
Pure in Millions
Dec. 31, 2020
$ / shares
Dec. 31, 2020
₪ / shares
Dec. 31, 2019
$ / shares
Dec. 31, 2019
₪ / shares
Dec. 31, 2018
$ / shares
Dec. 31, 2018
₪ / shares
Notes to Consolidated Financial Statements [Abstract]            
Number of options exercisable (In Millions) 11 11 12 12 11 11
Weighted average exercise price | (per share) $ 4.32 ₪ 13.89 $ 4.4 ₪ 15.19 $ 4.94 ₪ 18.53