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Financing arrangements - Debt Extinguishment (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Debt Instrument [Line Items] |  |  |
Extinguishment of debt, amount | $ 647 | $ 297 |
Gain (loss) on extinguishment of debt | $ 225 | $ 78 |
2.00% notes due 2032 (2.00% 2032 Notes) | Notes |  |  |
Debt Instrument [Line Items] |  |  |
Interest rate, stated percentage | 2.00% | 2.00% |
3.15% notes due 2040 (3.15% 2040 Notes) | Notes |  |  |
Debt Instrument [Line Items] |  |  |
Interest rate, stated percentage | 3.15% |  |
2.80% notes due 2041 (2.80% 2041 Notes) | Notes |  |  |
Debt Instrument [Line Items] |  |  |
Interest rate, stated percentage | 2.80% | 2.80% |
3.375% notes due 2050 (3.375% 2050 Notes) | Notes |  |  |
Debt Instrument [Line Items] |  |  |
Interest rate, stated percentage | 3.375% |  |
3.00% notes due 2052 (3.00% 2052 Notes) | Notes |  |  |
Debt Instrument [Line Items] |  |  |
Interest rate, stated percentage | 3.00% | 3.00% | 3.00%
4.20% 2052 Notes | Notes |  |  |
Debt Instrument [Line Items] |  |  |
Interest rate, stated percentage | 4.20% |  |
4.40% 2062 Notes | Notes |  |  |
Debt Instrument [Line Items] |  |  |
Interest rate, stated percentage | 4.40% |  |
2.20% notes due 2027 (2.20% 2027 Notes) | Notes |  |  |
Debt Instrument [Line Items] |  |  |
Interest rate, stated percentage | 2.20% | 2.20% |
1.65% notes due in 2028 (1.65% 2028 Notes) | Notes |  |  |
Debt Instrument [Line Items] |  |  |
Interest rate, stated percentage | 1.65% | 1.65% | 1.65%

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