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v3.21.2

Debt (Narrative) (Details) - USD ($) | 1 Months Ended | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
May 31, 2021 | Feb. 28, 2021 | Mar. 31, 2020 | Sep. 30, 2021 | Mar. 31, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2020
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Short-term debt |  |  |  | $ 0 |  |  | $ 0 |  | $ 0
Carrying value |  |  |  | 28,127,000,000 |  |  | 28,127,000,000 |  | 29,471,000,000
Long-term debt repaid |  |  |  |  |  |  | 6,542,000,000 | $ 1,000,000,000 |
Loss on early extinguishment of debt |  |  |  | 0 | $ 649,000,000 | $ 0 | 649,000,000 | $ 0 |
Loss on extinguishment of debt, premiums and fees |  |  |  |  | 623,000,000 |  |  |  |
Write-off of amortized debt discounts and issuance costs, debt extinguishment |  |  |  |  | $ 26,000,000 |  |  |  |
Accrued interest on long-term debt |  |  |  | 206,000,000 |  |  | $ 206,000,000 |  | $ 458,000,000
Senior Notes [Member] | USD Denominated Notes [Member] |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Face amount |  | $ 5,500,000,000 |  |  |  |  |  |  |
Repayments of senior unsecured debt | $ 1,500,000,000 |  |  |  |  |  |  |  |
Senior Notes [Member] | USD Denominated Notes Due 2032 [Member] |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Face amount |  | $ 1,750,000,000 |  |  |  |  |  |  |
Debt instrument, interest rate, stated percentage |  | 2.45% |  |  |  |  |  |  |
Senior Notes [Member] | USD Denominated Notes Due 2041 [Member] |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Face amount |  | $ 1,500,000,000 |  |  |  |  |  |  |
Debt instrument, interest rate, stated percentage |  | 3.40% |  |  |  |  |  |  |
Senior Notes [Member] | USD Denominated Notes Due 2051 [Member] |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Face amount |  | $ 1,250,000,000 |  |  |  |  |  |  |
Debt instrument, interest rate, stated percentage |  | 3.70% |  |  |  |  |  |  |
Senior Notes [Member] | USD Denominated Notes Due 2061 [Member] |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Face amount |  | $ 1,000,000,000 |  |  |  |  |  |  |
Debt instrument, interest rate, stated percentage |  | 4.00% |  |  |  |  |  |  |
Senior Notes [Member] | USD Denominated Notes, 3.490 Percent, Due 2022 [Member] |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt instrument, interest rate, stated percentage |  |  |  |  | 3.49% |  |  |  |
Long-term debt repaid |  |  |  |  | $ 1,000,000,000 |  |  |  |
Revolving Credit Facility [Member] |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt instrument, covenant, consolidated EBITDA to interest expense ratio, minimum |  |  |  |  |  |  | 4.0 |  |
Debt instrument, consolidated EBITDA to interest expense ratio |  |  |  |  |  |  | 9.8 |  |
Revolving Credit Facility [Member] | Line of Credit [Member] | Revolving Credit Facility Due August 2024 [Member] |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Face amount |  |  |  | $ 3,000,000,000 |  |  | $ 3,000,000,000 |  |
Debt instrument, term |  |  |  |  |  |  | 5 years |  |
Debt instrument, extension term |  |  |  |  |  |  | 1 year |  |
Proceeds from issuance of debt |  |  | $ 3,000,000,000 |  |  |  |  |  |
London Interbank Offered Rate (LIBOR) [Member] | Revolving Credit Facility [Member] | Line of Credit [Member] | Revolving Credit Facility Due August 2024 [Member] |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt instrument, basis spread on variable rate |  |  |  |  |  |  | 1.00% |  |
Debt Instrument, Redemption, Period One [Member] | Senior Notes [Member] |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt instrument, redemption price, percentage |  | 101.00% |  |  |  |  |  |  |

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