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Financing (Components Of Debt) (Table) (Details) € in Millions, SFr in Millions, $ in Millions, ¥ in Billions | Dec. 31, 2020 USD ($) | Dec. 31, 2020 EUR (€) | Dec. 31, 2020 JPY (¥) | Dec. 31, 2020 CHF (SFr) | Oct. 06, 2020 USD ($) | Apr. 08, 2020 EUR (€) | Mar. 30, 2020 EUR (€) | Dec. 31, 2019 USD ($) | Dec. 31, 2019 EUR (€) | Dec. 31, 2019 JPY (¥) | Dec. 31, 2019 CHF (SFr) | Dec. 31, 2001 USD ($)
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Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total debt | $ 21,204 |  |  |  |  |  |  | $ 21,729 |  |  |  |
Less: currently payable | 11 |  |  |  |  |  |  | 212 |  |  |  |
Long-term debt | 21,193 |  |  |  |  |  |  | 21,517 |  |  |  |
Senior notes |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount | 1,000 |  |  |  |  |  |  |  |  |  |  |
Euro-denominated commercial paper | Commercial paper |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total debt | 611 | € 500 |  |  |  |  |  | 5,146 | € 4,600 |  |  |
Zero-coupon LYONS due 2021 | Convertible debt |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total debt | $ 24 |  |  |  |  |  |  | 34 |  |  |  |
Interest rate of debt instrument | 0.00% | 0.00% | 0.00% | 0.00% |  |  |  |  |  |  |  | 2.375%
Debt instrument, face amount |  |  |  |  |  |  |  |  |  |  |  | $ 830
0.352% senior unsecured notes due 2021 | Senior notes |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total debt | $ 290 |  |  |  |  |  |  | $ 276 |  |  |  |
Interest rate of debt instrument | 0.352% | 0.352% | 0.352% | 0.352% |  |  |  | 0.352% | 0.352% | 0.352% | 0.352% |
Debt instrument, face amount | ¥ |  |  | ¥ 30.0 |  |  |  |  |  |  | ¥ 30.0 |  |
1.7% senior unsecured notes due 2022 | Senior notes |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total debt | $ 0 |  |  |  |  |  |  | $ 895 |  |  |  |
Interest rate of debt instrument | 1.70% | 1.70% | 1.70% | 1.70% |  |  |  | 1.70% | 1.70% | 1.70% | 1.70% |
Debt instrument, face amount | € |  |  |  |  |  |  |  |  | € 800 |  |  |
Floating rate senior unsecured notes due 2022 | Senior notes |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total debt | $ 305 |  |  |  |  |  |  | $ 280 |  |  |  |
Debt instrument, face amount | € |  | € 250 |  |  |  |  |  |  | € 250 |  |  |
2.05% senior unsecured notes due 2022 | Senior notes |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total debt | $ 698 |  |  |  |  |  |  | $ 697 |  |  |  |
Interest rate of debt instrument | 2.05% | 2.05% | 2.05% | 2.05% |  |  |  | 2.05% | 2.05% | 2.05% | 2.05% |
0.5% senior unsecured bonds due 2023 | Bonds |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total debt | $ 611 |  |  |  |  |  |  | $ 559 |  |  |  |
Interest rate of debt instrument | 0.50% | 0.50% | 0.50% | 0.50% |  |  |  | 0.50% | 0.50% | 0.50% | 0.50% |
Debt instrument, face amount | SFr |  |  |  | SFr 540 |  |  |  |  |  |  | SFr 540 |
1.7% senior notes due 2024 | Senior notes |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total debt | $ 1,096 |  |  |  |  |  |  | $ 0 |  |  |  |
Interest rate of debt instrument | 1.70% | 1.70% | 1.70% | 1.70% |  | 1.70% | 1.70% |  |  |  |  |
Debt instrument, face amount | € |  | € 900 |  |  |  | € 150 | € 750 |  |  |  |  |
2.2% senior unsecured notes due 2024 | Senior notes |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total debt | $ 697 |  |  |  |  |  |  | $ 696 |  |  |  |
Interest rate of debt instrument | 2.20% | 2.20% | 2.20% | 2.20% |  |  |  | 2.20% | 2.20% | 2.20% | 2.20% |
2.5% senior unsecured notes due 2025 | Senior notes |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total debt | $ 975 |  |  |  |  |  |  | $ 894 |  |  |  |
Interest rate of debt instrument | 2.50% | 2.50% | 2.50% | 2.50% |  |  |  | 2.50% | 2.50% | 2.50% | 2.50% |
Debt instrument, face amount | € |  | € 800 |  |  |  |  |  |  | € 800 |  |  |
3.35% senior unsecured notes due 2025 | Senior notes |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total debt | $ 498 |  |  |  |  |  |  | $ 497 |  |  |  |
Interest rate of debt instrument | 3.35% | 3.35% | 3.35% | 3.35% |  |  |  | 3.35% | 3.35% | 3.35% | 3.35% |
0.2% senior unsecured notes due 2026 | Senior notes |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total debt | $ 1,520 |  |  |  |  |  |  | $ 1,392 |  |  |  |
Interest rate of debt instrument | 0.20% | 0.20% | 0.20% | 0.20% |  |  |  | 0.20% | 0.20% | 0.20% | 0.20% |
Debt instrument, face amount | € |  | € 1,300 |  |  |  |  |  |  | € 1,300 |  |  |
2.1% senior notes due 2026 | Senior notes |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total debt | $ 975 |  |  |  |  |  |  | $ 0 |  |  |  |
Interest rate of debt instrument | 2.10% | 2.10% | 2.10% | 2.10% |  | 2.10% | 2.10% |  |  |  |  |
Debt instrument, face amount | € |  | € 800 |  |  |  | € 300 | € 500 |  |  |  |  |
0.3% senior unsecured notes due 2027 | Senior notes |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total debt | $ 297 |  |  |  |  |  |  | $ 283 |  |  |  |
Interest rate of debt instrument | 0.30% | 0.30% | 0.30% | 0.30% |  |  |  | 0.30% | 0.30% | 0.30% | 0.30% |
Debt instrument, face amount | ¥ |  |  | ¥ 30.8 |  |  |  |  |  |  | ¥ 30.8 |  |
1.2% senior unsecured notes due 2027 | Senior notes |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total debt | $ 729 |  |  |  |  |  |  | $ 668 |  |  |  |
Interest rate of debt instrument | 1.20% | 1.20% | 1.20% | 1.20% |  |  |  | 1.20% | 1.20% | 1.20% | 1.20% |
Debt instrument, face amount | € |  | € 600 |  |  |  |  |  |  | € 600 |  |  |
0.45% senior unsecured notes due 2028 | Senior notes |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total debt | $ 1,518 |  |  |  |  |  |  | $ 1,390 |  |  |  |
Interest rate of debt instrument | 0.45% | 0.45% | 0.45% | 0.45% |  |  |  | 0.45% | 0.45% | 0.45% | 0.45% |
Debt instrument, face amount | € |  | € 1,300 |  |  |  |  |  |  | € 1,300 |  |  |
1.125% senior unsecured bonds due 2028 | Bonds |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total debt | $ 241 |  |  |  |  |  |  | $ 221 |  |  |  |
Interest rate of debt instrument | 1.125% | 1.125% | 1.125% | 1.125% |  |  |  | 1.125% | 1.125% | 1.125% | 1.125% |
Debt instrument, face amount | SFr |  |  |  | SFr 210 |  |  |  |  |  |  | SFr 210 |
2.6% senior unsecured notes due 2029 | Senior notes |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total debt | $ 795 |  |  |  |  |  |  | $ 795 |  |  |  |
Interest rate of debt instrument | 2.60% | 2.60% | 2.60% | 2.60% |  |  |  | 2.60% | 2.60% | 2.60% | 2.60% |
2.5% senior notes due 2030 | Senior notes |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total debt | $ 978 |  |  |  |  |  |  | $ 0 |  |  |  |
Interest rate of debt instrument | 2.50% | 2.50% | 2.50% | 2.50% |  | 2.50% | 2.50% |  |  |  |  |
Debt instrument, face amount | € |  | € 800 |  |  |  | € 300 | € 500 |  |  |  |  |
0.75% senior unsecured notes due 2031 | Senior notes |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total debt | $ 2,127 |  |  |  |  |  |  | $ 1,949 |  |  |  |
Interest rate of debt instrument | 0.75% | 0.75% | 0.75% | 0.75% |  |  |  | 0.75% | 0.75% | 0.75% | 0.75% |
Debt instrument, face amount | € |  | € 1,800 |  |  |  |  |  |  | € 1,800 |  |  |
0.65% senior unsecured notes due 2032 | Senior notes |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total debt | $ 514 |  |  |  |  |  |  | $ 488 |  |  |  |
Interest rate of debt instrument | 0.65% | 0.65% | 0.65% | 0.65% |  |  |  | 0.65% | 0.65% | 0.65% | 0.65% |
Debt instrument, face amount | ¥ |  |  | ¥ 53.2 |  |  |  |  |  |  | ¥ 53.2 |  |
1.35% senior unsecured notes due 2039 | Senior notes |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total debt | $ 1,511 |  |  |  |  |  |  | $ 1,384 |  |  |  |
Interest rate of debt instrument | 1.35% | 1.35% | 1.35% | 1.35% |  |  |  | 1.35% | 1.35% | 1.35% | 1.35% |
Debt instrument, face amount | € |  | € 1,300 |  |  |  |  |  |  | € 1,300 |  |  |
3.25% senior unsecured notes due 2039 | Senior notes |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total debt | $ 889 |  |  |  |  |  |  | $ 890 |  |  |  |
Interest rate of debt instrument | 3.25% | 3.25% | 3.25% | 3.25% |  |  |  | 3.25% | 3.25% | 3.25% | 3.25% |
4.375% senior unsecured notes due 2045 | Senior notes |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total debt | $ 499 |  |  |  |  |  |  | $ 499 |  |  |  |
Interest rate of debt instrument | 4.375% | 4.375% | 4.375% | 4.375% |  |  |  | 4.375% | 4.375% | 4.375% | 4.375% |
1.8% senior unsecured notes due 2049 | Senior notes |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total debt | $ 907 |  |  |  |  |  |  | $ 831 |  |  |  |
Interest rate of debt instrument | 1.80% | 1.80% | 1.80% | 1.80% |  |  |  | 1.80% | 1.80% | 1.80% | 1.80% |
Debt instrument, face amount | € |  | € 750 |  |  |  |  |  |  | € 750 |  |  |
3.4% senior unsecured notes due 2049 | Senior notes |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total debt | $ 889 |  |  |  |  |  |  | $ 890 |  |  |  |
Interest rate of debt instrument | 3.40% | 3.40% | 3.40% | 3.40% |  |  |  | 3.40% | 3.40% | 3.40% | 3.40% |
2.6% senior unsecured notes due 2050 | Senior notes |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total debt | $ 979 |  |  |  |  |  |  | $ 0 |  |  |  |
Interest rate of debt instrument | 2.60% | 2.60% | 2.60% | 2.60% | 2.60% |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  | $ 1,000 |  |  |  |  |  |  |
Other |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total debt | $ 31 |  |  |  |  |  |  | $ 75 |  |  |  |

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