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Financing arrangements (Debt Repayments) (Details) € in Millions, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 USD ($) | Dec. 31, 2021 EUR (€) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2019 EUR (€)
Debt Instrument [Line Items] |  |  |  |  |
Repayments of debt | $ 4,150 |  | $ 6,450 | $ 4,514 |
Make-whole payments recognized in interest expense | 1,197 |  | 1,262 | 1,289 |
Notes [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Repayments of debt | 4,200 |  | 6,500 | 4,500 |
Make-whole payments recognized in interest expense | $ 24 |  | $ 96 |  |
Notes [Member] | 2.20% notes due 2019 (2.20% 2019 Notes) [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Repayments of debt |  |  |  | $ 1,400 |
Interest rate, stated percentage |  |  |  | 2.20% | 2.20%
Notes [Member] | 5.70% notes due 2019 (5.70% 2019 Notes) [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Repayments of debt |  |  |  | $ 1,000 |
Interest rate, stated percentage |  |  |  | 5.70% | 5.70%
Notes [Member] | 2.125% 2019 Euro Notes |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Repayments of debt | € |  |  |  |  | € 675
Interest rate, stated percentage |  |  | 2.125% | 2.125% | 2.125%
Notes [Member] | 1.90% notes due 2019 (1.90% 2019 Notes) [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Repayments of debt |  |  |  | $ 700 |
Interest rate, stated percentage |  |  |  | 1.90% | 1.90%
Notes [Member] | Floating Rate Notes Due 2019 [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Repayments of debt |  |  |  | $ 550 |
Notes [Member] | 4.50% notes due 2020 (4.50% 2020 Notes) |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Repayments of debt |  |  | $ 300 |  |
Interest rate, stated percentage |  |  | 4.50% |  |
Notes [Member] | 2.125% notes due 2020 (2.125% 2020 Notes) |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Repayments of debt |  |  | $ 750 | $ 864 |
Interest rate, stated percentage |  |  | 2.125% |  |
Notes [Member] | 2.20% notes due 2020 (2.20% 2020 Notes) |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Repayments of debt |  |  | $ 700 |  |
Interest rate, stated percentage |  |  | 2.20% |  |
Notes [Member] | 3.45% notes due 2020 (3.45% 2020 Notes) |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Repayments of debt |  |  | $ 900 |  |
Interest rate, stated percentage |  |  | 3.45% |  |
Notes [Member] | Floating Rate Notes Due 2020 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Repayments of debt |  |  | $ 300 |  |
Notes [Member] | 4.10% notes due 2021 (4.10% 2021 Notes) |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Repayments of debt |  |  | $ 1,000 |  |
Interest rate, stated percentage |  |  | 4.10% |  |
Notes [Member] | 1.85% notes due 2021 (1.85% 2021 Notes) |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Repayments of debt |  |  | $ 750 |  |
Interest rate, stated percentage |  |  | 1.85% |  |
Notes [Member] | 3.875% notes due 2021 (3.875% 2021 Notes) |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Repayments of debt |  |  | $ 1,750 |  |
Interest rate, stated percentage |  |  | 3.875% |  |
Notes [Member] | 1.25% notes due 2022 (1.25% 2022 Notes) |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Repayments of debt | € |  | € 1,250 |  |  |
Interest rate, stated percentage | 1.25% | 1.25% |  |  |
Notes [Member] | 2.70% notes due 2022 (2.70% 2022 Notes) |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Repayments of debt | $ 500 |  |  |  |
Interest rate, stated percentage | 2.70% | 2.70% |  |  |
Notes [Member] | 2.65% notes due 2022 (2.65% 2022 Notes) |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Repayments of debt |  |  | $ 1,500 |  |
Interest rate, stated percentage | 2.65% | 2.65% |  |  |
Notes [Member] | 3.625% notes due 2022 (3.625% 2022 Notes) |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Repayments of debt | $ 750 |  |  |  |
Interest rate, stated percentage | 3.625% | 3.625% | 3.625% |  |
Notes [Member] | 2.45% notes due 2030 (2.45% 2030 Notes) |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Interest rate, stated percentage | 2.45% | 2.45% | 2.45% |  |
Notes [Member] | 2.30% notes due 2031 (2.30% 2031 Notes) |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Interest rate, stated percentage | 2.30% | 2.30% | 2.30% |  |

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