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Credit from Banks and Others (Restrictions on the Group Relating to the Receipt of Credit) (Details) $ in Millions	Dec. 31, 2020 USD ($)
Notes to Consolidated Financial Statements [Abstract]
Financial Covenant: Total shareholder's equity greater than 2,000 million dollars	$ 3,930
Financial Covenant: Ratio of the EBITDA to the net interest expenses equal to or greater than 3.5	9.3
Financial Covenant: Ratio of the net financial debt to EBITDA less than 3.5	2.3
Financial Covenant: Ratio of certain subsidiaries loans to the total assets of the consolidated company less than 10%	4.30%