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Financial Instruments and Risk Management (Market risk - Sensitivity Analysis) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Euro/U.S Dollar [Member] |  |
Disclosure of financial instruments [Line Items] |  |
Impact on profit (loss) | $ (96) | $ (95)
U.S Dollar/British Pound [Member] |  |
Disclosure of financial instruments [Line Items] |  |
Impact on profit (loss) | 2 | (4)
U.S Dollar/Israeli Shekel [Member] |  |
Disclosure of financial instruments [Line Items] |  |
Impact on profit (loss) | 134 | 98
U.S Dollar/Chinese Yuan Renminbi [Member] |  |
Disclosure of financial instruments [Line Items] |  |
Impact on profit (loss) | (1) | (1)
U.S Dollar/Turkey Lira [Member] |  |
Disclosure of financial instruments [Line Items] |  |
Impact on profit (loss) | (1) | $ (1)
Option contract [Member] | Euro/U.S Dollar [Member] | Decrease 10% [Member] |  |
Disclosure of financial instruments [Line Items] |  |
Impact on profit (loss) | (6) |
Option contract [Member] | Euro/U.S Dollar [Member] | Decrease 5% [Member] |  |
Disclosure of financial instruments [Line Items] |  |
Impact on profit (loss) | (3) |
Option contract [Member] | Euro/U.S Dollar [Member] | Increase 5% [Member] |  |
Disclosure of financial instruments [Line Items] |  |
Impact on profit (loss) | 2 |
Option contract [Member] | Euro/U.S Dollar [Member] | Increase 10% [Member] |  |
Disclosure of financial instruments [Line Items] |  |
Impact on profit (loss) | 4 |
Option contract [Member] | U.S Dollar/British Pound [Member] | Decrease 10% [Member] |  |
Disclosure of financial instruments [Line Items] |  |
Impact on profit (loss) | 1 |
Option contract [Member] | U.S Dollar/British Pound [Member] | Decrease 5% [Member] |  |
Disclosure of financial instruments [Line Items] |  |
Impact on profit (loss) | 1 |
Option contract [Member] | U.S Dollar/British Pound [Member] | Increase 5% [Member] |  |
Disclosure of financial instruments [Line Items] |  |
Impact on profit (loss) | 0 |
Option contract [Member] | U.S Dollar/British Pound [Member] | Increase 10% [Member] |  |
Disclosure of financial instruments [Line Items] |  |
Impact on profit (loss) | (1) |
Option contract [Member] | U.S Dollar/Israeli Shekel [Member] | Decrease 10% [Member] |  |
Disclosure of financial instruments [Line Items] |  |
Impact on profit (loss) | 44 |
Option contract [Member] | U.S Dollar/Israeli Shekel [Member] | Decrease 5% [Member] |  |
Disclosure of financial instruments [Line Items] |  |
Impact on profit (loss) | 19 |
Option contract [Member] | U.S Dollar/Israeli Shekel [Member] | Increase 5% [Member] |  |
Disclosure of financial instruments [Line Items] |  |
Impact on profit (loss) | (14) |
Option contract [Member] | U.S Dollar/Israeli Shekel [Member] | Increase 10% [Member] |  |
Disclosure of financial instruments [Line Items] |  |
Impact on profit (loss) | (26) |
Swap contract [Member] | Euro/U.S Dollar [Member] | Decrease 10% [Member] |  |
Disclosure of financial instruments [Line Items] |  |
Impact on profit (loss) | (41) |
Swap contract [Member] | Euro/U.S Dollar [Member] | Decrease 5% [Member] |  |
Disclosure of financial instruments [Line Items] |  |
Impact on profit (loss) | (19) |
Swap contract [Member] | Euro/U.S Dollar [Member] | Increase 5% [Member] |  |
Disclosure of financial instruments [Line Items] |  |
Impact on profit (loss) | 18 |
Swap contract [Member] | Euro/U.S Dollar [Member] | Increase 10% [Member] |  |
Disclosure of financial instruments [Line Items] |  |
Impact on profit (loss) | 33 |
Swap contract [Member] | U.S Dollar/British Pound [Member] | Decrease 10% [Member] |  |
Disclosure of financial instruments [Line Items] |  |
Impact on profit (loss) | 8 |
Swap contract [Member] | U.S Dollar/British Pound [Member] | Decrease 5% [Member] |  |
Disclosure of financial instruments [Line Items] |  |
Impact on profit (loss) | 4 |
Swap contract [Member] | U.S Dollar/British Pound [Member] | Increase 5% [Member] |  |
Disclosure of financial instruments [Line Items] |  |
Impact on profit (loss) | (3) |
Swap contract [Member] | U.S Dollar/British Pound [Member] | Increase 10% [Member] |  |
Disclosure of financial instruments [Line Items] |  |
Impact on profit (loss) | (6) |
Swap contract [Member] | U.S Dollar/Israeli Shekel [Member] | Decrease 10% [Member] |  |
Disclosure of financial instruments [Line Items] |  |
Impact on profit (loss) | 101 |
Swap contract [Member] | U.S Dollar/Israeli Shekel [Member] | Decrease 5% [Member] |  |
Disclosure of financial instruments [Line Items] |  |
Impact on profit (loss) | 48 |
Swap contract [Member] | U.S Dollar/Israeli Shekel [Member] | Increase 5% [Member] |  |
Disclosure of financial instruments [Line Items] |  |
Impact on profit (loss) | (43) |
Swap contract [Member] | U.S Dollar/Israeli Shekel [Member] | Increase 10% [Member] |  |
Disclosure of financial instruments [Line Items] |  |
Impact on profit (loss) | (82) |
Forward contracts [Member] | Euro/U.S Dollar [Member] | Decrease 10% [Member] |  |
Disclosure of financial instruments [Line Items] |  |
Impact on profit (loss) | (17) |
Forward contracts [Member] | Euro/U.S Dollar [Member] | Decrease 5% [Member] |  |
Disclosure of financial instruments [Line Items] |  |
Impact on profit (loss) | (8) |
Forward contracts [Member] | Euro/U.S Dollar [Member] | Increase 5% [Member] |  |
Disclosure of financial instruments [Line Items] |  |
Impact on profit (loss) | 7 |
Forward contracts [Member] | Euro/U.S Dollar [Member] | Increase 10% [Member] |  |
Disclosure of financial instruments [Line Items] |  |
Impact on profit (loss) | 14 |
Forward contracts [Member] | U.S Dollar/British Pound [Member] | Decrease 10% [Member] |  |
Disclosure of financial instruments [Line Items] |  |
Impact on profit (loss) | 3 |
Forward contracts [Member] | U.S Dollar/British Pound [Member] | Decrease 5% [Member] |  |
Disclosure of financial instruments [Line Items] |  |
Impact on profit (loss) | 1 |
Forward contracts [Member] | U.S Dollar/British Pound [Member] | Increase 5% [Member] |  |
Disclosure of financial instruments [Line Items] |  |
Impact on profit (loss) | (1) |
Forward contracts [Member] | U.S Dollar/British Pound [Member] | Increase 10% [Member] |  |
Disclosure of financial instruments [Line Items] |  |
Impact on profit (loss) | (3) |
Forward contracts [Member] | U.S Dollar/Israeli Shekel [Member] | Decrease 10% [Member] |  |
Disclosure of financial instruments [Line Items] |  |
Impact on profit (loss) | 48 |
Forward contracts [Member] | U.S Dollar/Israeli Shekel [Member] | Decrease 5% [Member] |  |
Disclosure of financial instruments [Line Items] |  |
Impact on profit (loss) | 23 |
Forward contracts [Member] | U.S Dollar/Israeli Shekel [Member] | Increase 5% [Member] |  |
Disclosure of financial instruments [Line Items] |  |
Impact on profit (loss) | (20) |
Forward contracts [Member] | U.S Dollar/Israeli Shekel [Member] | Increase 10% [Member] |  |
Disclosure of financial instruments [Line Items] |  |
Impact on profit (loss) | (39) |
Forward contracts [Member] | U.S Dollar/Japanese Yen [Member] | Decrease 10% [Member] |  |
Disclosure of financial instruments [Line Items] |  |
Impact on profit (loss) | (1) |
Forward contracts [Member] | U.S Dollar/Japanese Yen [Member] | Decrease 5% [Member] |  |
Disclosure of financial instruments [Line Items] |  |
Impact on profit (loss) | 0 |
Forward contracts [Member] | U.S Dollar/Japanese Yen [Member] | Increase 5% [Member] |  |
Disclosure of financial instruments [Line Items] |  |
Impact on profit (loss) | 0 |
Forward contracts [Member] | U.S Dollar/Japanese Yen [Member] | Increase 10% [Member] |  |
Disclosure of financial instruments [Line Items] |  |
Impact on profit (loss) | $ 1 |

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