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Financial Instruments - Narrative (Details) € in Millions, ¥ in Millions, SFr in Millions | 3 Months Ended | 6 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2025 USD ($) | Jun. 30, 2024 USD ($) | Jun. 30, 2025 USD ($) | Jun. 30, 2024 USD ($) | Jun. 30, 2025 CHF (SFr) | Jun. 30, 2025 EUR (€) | Jun. 30, 2025 CNY (¥) | Feb. 28, 2025 USD ($) | Dec. 31, 2024 USD ($) | Feb. 29, 2024 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |  |
Net investment gains (losses) on equity securities | $ 114,000,000.0 | $ (157,900,000) | $ (32,800,000) | $ (141,900,000) |  |  |  |  |  |
Unfunded commitments to invest in venture capital funds | 835,000,000 |  | $ 835,000,000 |  |  |  |  |  |  |
Unfunded commitments to invest in venture capital funds, anticipated payment period |  |  | 10 years |  |  |  |  |  |  |
Proceeds from sales of available-for-sale investments | 47,200,000 | $ 21,000,000.0 | $ 88,800,000 | $ 45,400,000 |  |  |  |  |  |
Accounts receivable derecognized | 477,200,000 |  | 477,200,000 |  |  |  |  |  | $ 421,600,000 |
Foreign currency-denominated notes, designated as hedge | $ 6,030,000,000.00 |  | $ 6,030,000,000.00 |  |  |  |  |  | 5,340,000,000 |
Average remaining maturity of foreign currency derivatives |  |  | 12 months |  |  |  |  |  |  |
Maximum remaining maturity of foreign currency derivatives |  |  | 180 days |  |  |  |  |  |  |
Variable rate | 5.00% |  | 5.00% |  | 5.00% | 5.00% | 5.00% |  |  |
Swap Swiss Francs to U.S. Dollars |  |  |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |  |
Derivative liability, notional amount | SFr |  |  |  |  | SFr 402.0 |  |  |  |  |
Sell Euro |  |  |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |  |
Derivative asset, notional amount | € |  |  |  |  |  | € 18,230 |  |  |  |
Sell Chinese Yuan |  |  |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |  |
Derivative asset, notional amount | ¥ |  |  |  |  |  |  | ¥ 4,950 |  |  |
Senior Notes |  |  |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  |  |  | $ 6,500,000,000
Foreign Currency Denominated Debt |  |  |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |  |
Long-term debt | $ 6,800,000,000 |  | $ 6,800,000,000 |  |  |  |  |  | $ 6,030,000,000.00 |
4.550% Notes Due 2028 | Senior Notes |  |  |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  | $ 1,000,000,000 |  |
Stated interest rate |  |  |  |  |  |  |  | 4.55% |  |
4.750% Notes Due 2030 | Senior Notes |  |  |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  | $ 1,250,000,000 |  |
Stated interest rate |  |  |  |  |  |  |  | 4.75% |  |
4.9% Notes Due 2032 | Senior Notes |  |  |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  | $ 1,000,000,000 |  |
Stated interest rate |  |  |  |  |  |  |  | 4.90% |  |
5.1% Notes Due 2035 | Senior Notes |  |  |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  | $ 1,250,000,000 |  |
Stated interest rate |  |  |  |  |  |  |  | 5.10% |  |
5.5% Notes Due 2055 | Senior Notes |  |  |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  | $ 1,250,000,000 |  |
Stated interest rate |  |  |  |  |  |  |  | 5.50% |  |
5.6% Notes Due 2065 | Senior Notes |  |  |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  | $ 750,000,000 |  |
Stated interest rate |  |  |  |  |  |  |  | 5.60% |  |

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