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Borrowings (Narrative) (Details) | 1 Months Ended | 2 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Sep. 30, 2021 USD ($) | May 31, 2020 USD ($) | Nov. 30, 2019 USD ($) | Feb. 28, 2019 USD ($) | Sep. 30, 2020 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Sep. 30, 2021 EUR (€) | Sep. 30, 2021 GBP (£) | Aug. 31, 2020 USD ($) | Nov. 30, 2019 EUR (€) | Nov. 30, 2019 JPY (¥)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit facility, remaining borrowing capacity |  |  |  |  |  |  | $ 5,260,000,000 |  |  |  |  |  |  |
Loss on extinguishment of debt |  |  |  |  |  |  | 405,200,000 | $ 0 | $ 252,500,000 |  |  |  |  |
Long-term debt |  |  |  |  |  |  | $ 15,346,400,000 | $ 16,586,600,000 |  |  |  |  |  |
Description of derivative activity volume percent |  |  |  |  |  |  | 13.00% |  |  |  |  |  |  |
Debt instrument, interest rate, effective percentage |  |  |  |  |  |  | 2.27% | 2.61% |  |  |  |  |  |
Maturity Date, 2023 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  |  |  |  |  | $ 3,000,000,000 |  |  |  |  |  |  |
Maturity Date, 2019 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  |  |  |  |  | $ 2,000,000,000 |  |  |  |  |  |  |
Debt instrument, term |  |  |  |  |  |  | 364 days |  |  |  |  |  |  |
Foreign Currency Denominated Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payment for debt extinguishment | $ 1,910,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Extinguishment of debt, amount | 1,500,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Loss on extinguishment of debt | 405,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign Currency Denominated Debt | 0.500% Notes due 2033 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount | € |  |  |  |  |  |  |  |  |  | € 600,000,000 |  |  |  |
Stated interest rate |  |  |  |  |  |  |  |  |  | 0.50% | 0.50% |  |  |
Foreign Currency Denominated Debt | 1.125% Notes due 2051 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount | € |  |  |  |  |  |  |  |  |  | € 500,000,000 |  |  |  |
Stated interest rate |  |  |  |  |  |  |  |  |  | 1.125% | 1.125% |  |  |
Foreign Currency Denominated Debt | 1.375% Notes due 2061 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount | € |  |  |  |  |  |  |  |  |  | € 700,000,000 |  |  |  |
Stated interest rate |  |  |  |  |  |  |  |  |  | 1.375% | 1.375% |  |  |
Foreign Currency Denominated Debt | 1.625% Notes due 2043 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount | £ |  |  |  |  |  |  |  |  |  |  | £ 250,000,000 |  |  |
Stated interest rate |  |  |  |  |  |  |  |  |  | 1.625% | 1.625% |  |  |
Foreign Currency Denominated Debt | 3.95% notes due 2049 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stated interest rate |  |  |  |  |  |  |  |  |  | 3.95% | 3.95% |  |  |
Extinguishment of debt, amount | 541,800,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign Currency Denominated Debt | 4.15% notes due 2059 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stated interest rate |  |  |  |  |  |  |  |  |  | 4.15% | 4.15% |  |  |
Extinguishment of debt, amount | 408,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign Currency Denominated Debt | 3.375% notes due 2029 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stated interest rate |  |  |  |  |  |  |  |  |  | 3.375% | 3.375% |  |  |
Extinguishment of debt, amount | $ 219,400,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Senior Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss on extinguishment of debt |  |  |  |  |  | $ 252,500,000 |  |  |  |  |  |  |  |
Proceeds from issuance of debt |  |  |  | $ 4,450,000,000 |  |  |  |  |  |  |  |  |  |
Payments for repurchase and redemption of notes payable |  |  | $ 2,270,000,000 |  |  |  |  |  |  |  |  |  |  |
Repurchase aggregate principal amount |  |  | 2,000,000,000 |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  | 2,010,000,000.00 |  |  |  |  |  |  |  |  |  |  |
Senior Notes | 0.500% Notes due 2033 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stated interest rate |  |  |  |  |  |  | 0.50% |  |  |  |  |  |  |
Senior Notes | 1.125% Notes due 2051 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stated interest rate |  |  |  |  |  |  | 1.125% |  |  |  |  |  |  |
Senior Notes | 1.375% Notes due 2061 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stated interest rate |  |  |  |  |  |  | 1.375% |  |  |  |  |  |  |
Senior Notes | 1.625% Notes due 2043 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stated interest rate |  |  |  |  |  |  | 1.625% |  |  |  |  |  |  |
Senior Notes | 3.95% notes due 2049 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  | $ 1,500,000,000 |  |  |  |  |  |  |  |  |  |
Stated interest rate |  |  |  | 3.95% |  |  | 3.95% |  |  |  |  |  |  |
Senior Notes | 4.15% notes due 2059 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  | $ 1,000,000,000 |  |  |  |  |  |  |  |  |  |
Stated interest rate |  |  |  | 4.15% |  |  | 4.15% |  |  |  |  |  |  |
Senior Notes | 3.375% notes due 2029 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  | $ 1,150,000,000 |  |  |  |  |  |  |  |  |  |
Stated interest rate |  |  |  | 3.375% |  |  | 3.375% |  |  |  |  |  |  |
Senior Notes | Senior Notes Due May 2050 and September 2060 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of debt |  |  |  |  | $ 1,070,000,000.00 |  |  |  |  |  |  |  |  |
Senior Notes | 2.25% notes due 2050 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  | $ 1,000,000,000 |  |  |  |  |  |  |  |  |  | $ 250,000,000 |  |
Stated interest rate |  | 2.25% |  |  |  |  | 2.25% |  |  |  |  | 2.25% |  |
Proceeds from issuance of debt |  | $ 988,600,000 |  |  |  |  |  |  |  |  |  |  |  |
Senior Notes | 2.50% notes due 2060 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  |  |  |  |  | $ 850,000,000 |  |
Stated interest rate |  |  |  |  |  |  | 2.50% |  |  |  |  | 2.50% |  |
Senior Notes | 3.875% notes due 2039 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  | $ 850,000,000 |  |  |  |  |  |  |  |  |  |
Stated interest rate |  |  |  | 3.875% |  |  | 3.875% |  |  |  |  |  |  |
Senior Notes | November 2019 Euro-denominated Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of debt |  |  | $ 1,750,000,000 |  |  |  |  |  |  |  |  |  |  |
Senior Notes | 0.625% euro denominated notes due 2031 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount | € |  |  |  |  |  |  |  |  |  |  |  |  | € 600,000,000 |
Stated interest rate |  |  | 0.625% |  |  |  | 0.625% |  |  |  |  |  | 0.625% | 0.625%
Senior Notes | 1.70% euro denominated notes due 2049 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount | € |  |  |  |  |  |  |  |  |  |  |  |  | € 1,000,000,000 |
Stated interest rate |  |  | 1.70% |  |  |  | 1.70% |  |  |  |  |  | 1.70% | 1.70%
Senior Notes | November 2019 Yen-denominated Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of debt |  |  | $ 356,600,000 |  |  |  |  |  |  |  |  |  |  |
Senior Notes | 0.42% Japanese yen denominated notes due 2029 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount | ¥ |  |  |  |  |  |  |  |  |  |  |  |  |  | ¥ 22,920,000,000
Stated interest rate |  |  | 0.42% |  |  |  | 0.42% |  |  |  |  |  | 0.42% | 0.42%
Senior Notes | 0.56% Japanese yen denominated notes due 2034 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount | ¥ |  |  |  |  |  |  |  |  |  |  |  |  |  | ¥ 9,280,000,000
Stated interest rate |  |  | 0.56% |  |  |  | 0.56% |  |  |  |  |  | 0.56% | 0.56%
Senior Notes | 0.97% Japanese yen denominated notes due 2049 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount | ¥ |  |  |  |  |  |  |  |  |  |  |  |  |  | ¥ 7,640,000,000
Stated interest rate |  |  | 97.00% |  |  |  | 0.97% |  |  |  |  |  | 97.00% | 97.00%

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- Definition Amount of cash inflow (outflow) from long-term debt supported by a written promise to pay an obligation. + References No definition available. + Details
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