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Financing (Components Of Debt) (Details) € in Millions, SFr in Millions, $ in Millions, ¥ in Billions | Oct. 01, 2021 USD ($) | Oct. 01, 2021 EUR (€) | Oct. 01, 2021 JPY (¥) | Oct. 01, 2021 CHF (SFr) | Dec. 31, 2020 USD ($) | Dec. 31, 2020 EUR (€) | Dec. 31, 2020 JPY (¥) | Dec. 31, 2020 CHF (SFr)
--- | --- | --- | --- | --- | --- | --- | --- | ---
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt | $ 23,598 |  |  |  | $ 21,204 |  |  |
Less: currently payable | 7 |  |  |  | 11 |  |  |
Long-term debt excluding currently payable | 23,591 |  |  |  | 21,193 |  |  |
Other |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt | 28 |  |  |  | 31 |  |  |
Commercial paper | Euro-denominated commercial paper |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt | 1,392 | € 1,200 |  |  | 611 | € 500 |  |
Commercial paper | U.S. dollar-denominated commercial paper |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt | 2,677 |  |  |  | 0 |  |  |
Convertible debt | Zero-coupon LYONs due 2021 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt | $ 0 |  |  |  | $ 24 |  |  |
Interest rate of debt instrument | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00%
Senior notes | 0.352% senior notes due 2021 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt | $ 0 |  |  |  | $ 290 |  |  |
Interest rate of debt instrument | 0.352% | 0.352% | 0.352% | 0.352% | 0.352% | 0.352% | 0.352% | 0.352%
Aggregate principal amount | ¥ |  |  | ¥ 30.0 |  |  |  | ¥ 30.0 |
Senior notes | Floating rate senior notes due 2022 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt | $ 290 |  |  |  | $ 305 |  |  |
Aggregate principal amount | € |  | € 250 |  |  |  | € 250 |  |
Senior notes | 2.05% senior notes due 2022 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt | $ 699 |  |  |  | $ 698 |  |  |
Interest rate of debt instrument | 2.05% | 2.05% | 2.05% | 2.05% | 2.05% | 2.05% | 2.05% | 2.05%
Senior notes | 1.7% senior notes due 2024 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt | $ 1,039 |  |  |  | $ 1,096 |  |  |
Interest rate of debt instrument | 1.70% | 1.70% | 1.70% | 1.70% | 1.70% | 1.70% | 1.70% | 1.70%
Aggregate principal amount | € |  | € 900 |  |  |  | € 900 |  |
Senior notes | 2.2% senior notes due 2024 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt | $ 697 |  |  |  | $ 697 |  |  |
Interest rate of debt instrument | 2.20% | 2.20% | 2.20% | 2.20% | 2.20% | 2.20% | 2.20% | 2.20%
Senior notes | 2.5% senior notes due 2025 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt | $ 925 |  |  |  | $ 975 |  |  |
Interest rate of debt instrument | 2.50% | 2.50% | 2.50% | 2.50% | 2.50% | 2.50% | 2.50% | 2.50%
Aggregate principal amount | € |  | € 800 |  |  |  | € 800 |  |
Senior notes | 3.35% senior notes due 2025 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt | $ 498 |  |  |  | $ 498 |  |  |
Interest rate of debt instrument | 3.35% | 3.35% | 3.35% | 3.35% | 3.35% | 3.35% | 3.35% | 3.35%
Senior notes | 0.2% senior notes due 2026 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt | $ 1,443 |  |  |  | $ 1,520 |  |  |
Interest rate of debt instrument | 0.20% | 0.20% | 0.20% | 0.20% | 0.20% | 0.20% | 0.20% | 0.20%
Aggregate principal amount | € |  | € 1,300 |  |  |  | € 1,300 |  |
Senior notes | 2.1% senior notes due 2026 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt | $ 923 |  |  |  | $ 975 |  |  |
Interest rate of debt instrument | 2.10% | 2.10% | 2.10% | 2.10% | 2.10% | 2.10% | 2.10% | 2.10%
Aggregate principal amount | € |  | € 800 |  |  |  | € 800 |  |
Senior notes | 0.3% senior notes due 2027 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt | $ 277 |  |  |  | $ 297 |  |  |
Interest rate of debt instrument | 0.30% | 0.30% | 0.30% | 0.30% | 0.30% | 0.30% | 0.30% | 0.30%
Aggregate principal amount | ¥ |  |  | ¥ 30.8 |  |  |  | ¥ 30.8 |
Senior notes | 1.2% senior notes due 2027 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt | $ 692 |  |  |  | $ 729 |  |  |
Interest rate of debt instrument | 1.20% | 1.20% | 1.20% | 1.20% | 1.20% | 1.20% | 1.20% | 1.20%
Aggregate principal amount | € |  | € 600 |  |  |  | € 600 |  |
Senior notes | 0.45% senior notes due 2028 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt | $ 1,440 |  |  |  | $ 1,518 |  |  |
Interest rate of debt instrument | 0.45% | 0.45% | 0.45% | 0.45% | 0.45% | 0.45% | 0.45% | 0.45%
Aggregate principal amount | € |  | € 1,300 |  |  |  | € 1,300 |  |
Senior notes | 2.6% senior notes due 2029 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt | $ 795 |  |  |  | $ 795 |  |  |
Interest rate of debt instrument | 2.60% | 2.60% | 2.60% | 2.60% | 2.60% | 2.60% | 2.60% | 2.60%
Senior notes | 2.5% senior notes due 2030 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt | $ 926 |  |  |  | $ 978 |  |  |
Interest rate of debt instrument | 2.50% | 2.50% | 2.50% | 2.50% | 2.50% | 2.50% | 2.50% | 2.50%
Aggregate principal amount | € |  | € 800 |  |  |  | € 800 |  |
Senior notes | 0.75% senior notes due 2031 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt | $ 2,018 |  |  |  | $ 2,127 |  |  |
Interest rate of debt instrument | 0.75% | 0.75% | 0.75% | 0.75% | 0.75% | 0.75% | 0.75% | 0.75%
Aggregate principal amount | € |  | € 1,800 |  |  |  | € 1,800 |  |
Senior notes | 0.65% senior notes due 2032 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt | $ 478 |  |  |  | $ 514 |  |  |
Interest rate of debt instrument | 0.65% | 0.65% | 0.65% | 0.65% | 0.65% | 0.65% | 0.65% | 0.65%
Aggregate principal amount | ¥ |  |  | ¥ 53.2 |  |  |  | ¥ 53.2 |
Senior notes | 1.35% senior notes due 2039 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt | $ 1,433 |  |  |  | $ 1,511 |  |  |
Interest rate of debt instrument | 1.35% | 1.35% | 1.35% | 1.35% | 1.35% | 1.35% | 1.35% | 1.35%
Aggregate principal amount | € |  | € 1,300 |  |  |  | € 1,300 |  |
Senior notes | 3.25% senior notes due 2039 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt | $ 890 |  |  |  | $ 889 |  |  |
Interest rate of debt instrument | 3.25% | 3.25% | 3.25% | 3.25% | 3.25% | 3.25% | 3.25% | 3.25%
Senior notes | 4.375% senior notes due 2045 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt | $ 499 |  |  |  | $ 499 |  |  |
Interest rate of debt instrument | 4.375% | 4.375% | 4.375% | 4.375% | 4.375% | 4.375% | 4.375% | 4.375%
Senior notes | 1.8% senior notes due 2049 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt | $ 860 |  |  |  | $ 907 |  |  |
Interest rate of debt instrument | 1.80% | 1.80% | 1.80% | 1.80% | 1.80% | 1.80% | 1.80% | 1.80%
Aggregate principal amount | € |  | € 750 |  |  |  | € 750 |  |
Senior notes | 3.4% senior notes due 2049 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt | $ 889 |  |  |  | $ 889 |  |  |
Interest rate of debt instrument | 3.40% | 3.40% | 3.40% | 3.40% | 3.40% | 3.40% | 3.40% | 3.40%
Senior notes | 2.6% senior notes due 2050 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt | $ 980 |  |  |  | $ 979 |  |  |
Interest rate of debt instrument | 2.60% | 2.60% | 2.60% | 2.60% | 2.60% | 2.60% | 2.60% | 2.60%
Bonds | 0.5% senior bonds due 2023 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt | $ 581 |  |  |  | $ 611 |  |  |
Interest rate of debt instrument | 0.50% | 0.50% | 0.50% | 0.50% | 0.50% | 0.50% | 0.50% | 0.50%
Aggregate principal amount | SFr |  |  |  | SFr 540 |  |  |  | SFr 540
Bonds | 1.125% senior bonds due 2028 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt | $ 229 |  |  |  | $ 241 |  |  |
Interest rate of debt instrument | 1.125% | 1.125% | 1.125% | 1.125% | 1.125% | 1.125% | 1.125% | 1.125%
Aggregate principal amount | SFr |  |  |  | SFr 210 |  |  |  | SFr 210

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