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Long-term Debt - Additional Information (Detail) € in Millions, $ in Millions | 3 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Mar. 31, 2021 USD ($) | Mar. 31, 2020 EUR (€) | Apr. 28, 2021 EUR (€) | Mar. 31, 2021 EUR (€) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 EUR (€)
Debt Instrument [Line Items] |  |  |  |  |  |
Long-term debt, fair value | $ 17,500 |  |  |  | $ 17,300 |
Committed credit facility agreement aggregated | 6,250 |  |  |  |  |
Unused credit facility | 5,820 |  |  |  |  |
0.25% Notes due 2027 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Notes, face amount | € |  | € 400 |  |  |  | € 500
Debt instrument interest rate |  | 0.25% |  |  |  |
Debt instrument maturity date |  | 2027 |  |  |  |
0.50% Notes due 2031 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Notes, face amount | € |  | € 400 |  |  |  | € 500
Debt instrument interest rate |  | 0.50% |  |  |  |
Debt instrument maturity date |  | 2031 |  |  |  |
Commercial paper programs mature in February 2023 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Committed credit facility agreement aggregated | 2,750 |  |  |  |  |
Commercial paper programs mature in July 2025 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Committed credit facility agreement aggregated | 1,500 |  |  |  |  |
Commercial paper programs mature in February 2025 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Committed credit facility agreement aggregated | 2,000 |  |  |  |  |
Commercial paper borrowings |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Long-term debt | $ 400 |  |  |  | $ 400 |
Revolving Credit Facility |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Committed credit facility agreement aggregated | € |  |  |  | € 1,540 |  |
Credit facility extended period | 6 months |  |  |  |  |
Credit facility drawn | $ 0 |  |  |  |  |
Revolving Credit Facility | Subsequent Event |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Reduced size of credit facility | € |  |  | € 750 |  |  |

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