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Borrowings (Narrative) (Details) € in Millions, £ in Millions | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Feb. 29, 2024 USD ($) | Feb. 28, 2023 USD ($) | Sep. 30, 2021 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Feb. 27, 2024 USD ($) | Sep. 30, 2021 EUR (€) | Sep. 30, 2021 GBP (£)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Weighted average interest rate |  |  |  | 539.00% | 420.00% |  |  |  |
Line of credit facility, remaining borrowing capacity |  |  |  | $ 7,420,000,000 |  |  |  |  |
Debt extinguishment loss (Note 11) |  |  |  | $ 0 | $ 0 | $ 405,200,000 |  |  |
Description of derivative activity volume percent |  |  |  | 12.00% |  |  |  |  |
Debt instrument, interest rate, effective percentage |  |  |  | 3.37% | 2.87% |  |  |  |
Senior Notes | 4.5% Notes Due 2027 | Subsequent Event |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt instrument, face amount | $ 1,000,000,000 |  |  |  |  |  |  |  |
Stated interest rate | 4.50% |  |  |  |  |  |  |  |
Senior Notes | 4.5% Notes Due 2029 | Subsequent Event |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt instrument, face amount | $ 1,000,000,000 |  |  |  |  |  |  |  |
Stated interest rate | 4.50% |  |  |  |  |  |  |  |
Senior Notes | 4.7% Notes Due 2034 | Subsequent Event |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt instrument, face amount | $ 1,500,000,000 |  |  |  |  |  |  |  |
Stated interest rate | 4.70% |  |  |  |  |  |  |  |
Senior Notes | 5.0% Notes Due 2054 | Subsequent Event |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt instrument, face amount | $ 1,500,000,000 |  |  |  |  |  |  |  |
Stated interest rate | 5.00% |  |  |  |  |  |  |  |
Senior Notes | 5.1% Notes Due 2064 | Subsequent Event |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt instrument, face amount | $ 1,500,000,000 |  |  |  |  |  |  |  |
Stated interest rate | 5.10% |  |  |  |  |  |  |  |
Senior Notes | Senior Notes Due 2027, 2029, 2054 And 2064 | Subsequent Event |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Proceeds from issuance of debt | $ 6,450,000,000 |  |  |  |  |  |  |  |
Senior Notes | 5.0% notes due 2026 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  | $ 750,000,000 |  |  |  |  |  |  |
Stated interest rate |  | 5.00% |  | 5.00% |  |  |  |  |
Senior Notes | 5.0% notes due 2026 | Subsequent Event |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  | $ 750,000,000 |  |
Stated interest rate |  |  |  |  |  |  | 5.00% |  |
Senior Notes | 4.7% notes due 2033 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  | $ 1,000,000,000 |  |  |  |  |  |  |
Stated interest rate |  | 4.70% |  | 4.70% |  |  |  |  |
Senior Notes | 4.875% notes due 2053 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  | $ 1,250,000,000 |  |  |  |  |  |  |
Stated interest rate |  | 4.875% |  | 4.875% |  |  |  |  |
Senior Notes | 4.95% notes due 2063 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  | $ 1,000,000,000 |  |  |  |  |  |  |
Stated interest rate |  | 4.95% |  | 4.95% |  |  |  |  |
Senior Notes | Senior Notes Due 2026, 2033, 2053 And 2063 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Proceeds from issuance of debt |  | $ 3,960,000,000 |  |  |  |  |  |  |
Foreign Currency Denominated Debt |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  | € 1,800 | £ 250.0
Payment for debt extinguishment |  |  | $ 1,910,000,000 |  |  |  |  |  |
Extinguishment of debt, amount |  |  | 1,500,000,000 |  |  |  |  |  |
Debt extinguishment loss (Note 11) |  |  | $ 405,200,000 |  |  |  |  |  |
Maturity Date 2024 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  |  | $ 4,000,000,000 |  |  |  |  |
Debt instrument, term |  |  |  | 364 days |  |  |  |  |
Maturity Date 2027 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  |  | $ 3,000,000,000 |  |  |  |  |

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