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Financing arrangements - Interest Rate and Cross-currency Swaps (Details) $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2022 CHF (SFr) | Dec. 31, 2022 EUR (€) | Dec. 31, 2022 GBP (£) | Dec. 31, 2021 EUR (€)
Debt Instrument [Line Items] |  |  |  |  |  |  |
Net Cash Provided by (Used in) Operating Activities | $ 9,721 | $ 9,261 | $ 10,497 |  |  |  |
Repayments of debt | 0 | 4,150 | 6,450 |  |  |  |
Interest rate swap contracts | Designated as Hedging Instrument [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Notional amount | $ 6,700 | 6,700 |  |  |  |  |
Derivative, Notional Amount, Amount Terminated |  | $ 750 | 3,650 |  |  |  |
Net Cash Provided by (Used in) Operating Activities |  |  | 576 |  |  |  |
Interest Rate Swap, One [Member] | Interest rate swap contracts | Designated as Hedging Instrument [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Derivative, Notional Amount, Amount Terminated |  |  | 5,200 |  |  |  |
Interest Rate Swap, Two [Member] | Interest rate swap contracts | Designated as Hedging Instrument [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Notional amount |  |  | 5,200 |  |  |  |
0.41% Swiss Franc Bonds Due 2023 (0.41% 2023 Swiss franc Bonds) |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate, stated percentage | 0.41% |  |  | 0.41% | 0.41% | 0.41% |
0.41% Swiss Franc Bonds Due 2023 (0.41% 2023 Swiss franc Bonds) | Cross-currency swap contract [Member] | Cash flow hedge [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Notional amount | $ 704 |  |  | SFr 700,000,000 |  |  |
2.00% €750 million notes due 2026 (2.00% 2026 euro Notes) | Cross-currency swap contract [Member] | Cash flow hedge [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Notional amount | 833 |  |  |  | € 750,000,000 |  |
5.50% 2026 pound sterling Notes [Member] | Cross-currency swap contract [Member] | Cash flow hedge [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Notional amount | 747 |  |  |  |  | £ 475,000,000 |
4.00% 2029 pound sterling Notes [Member] | Cross-currency swap contract [Member] | Cash flow hedge [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Notional amount | 1,111 |  |  |  |  | £ 700,000,000 |
1.25% 2022 euro Notes | Cross-currency swap contract [Member] | Cash flow hedge [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate, stated percentage |  | 1.25% |  |  |  |  | 1.25%
Notes payable [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Notional amount | $ 6,650 | $ 6,650 |  |  |  |  |
Notes payable [Member] | 0.41% Swiss Franc Bonds Due 2023 (0.41% 2023 Swiss franc Bonds) |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate, stated percentage | 0.41% |  |  | 0.41% | 0.41% | 0.41% |
Notes payable [Member] | 3.625% notes due 2024 (3.625% 2024 Notes) |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate, stated percentage | 3.625% |  |  | 3.625% | 3.625% | 3.625% |
Notional amount | $ 1,400 | $ 1,400 |  |  |  |  |
Notes payable [Member] | 3.625% notes due 2024 (3.625% 2024 Notes) | LIBOR [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Derivative, effective interest rate | 3.20% | 3.20% |  | 3.20% | 3.20% | 3.20% | 3.20%
Notes payable [Member] | 3.125% notes due 2025 (3.125% 2025 Notes) |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate, stated percentage | 3.125% |  |  | 3.125% | 3.125% | 3.125% |
Notional amount | $ 1,000 | $ 1,000 |  |  |  |  |
Notes payable [Member] | 3.125% notes due 2025 (3.125% 2025 Notes) | LIBOR [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Derivative, effective interest rate | 1.80% | 1.80% |  | 1.80% | 1.80% | 1.80% | 1.80%
Notes payable [Member] | 2.600% notes due 2026 (2.60% 2026 notes) [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate, stated percentage | 2.60% |  |  | 2.60% | 2.60% | 2.60% |
Notional amount | $ 1,250 | $ 1,250 |  |  |  |  |
Notes payable [Member] | 2.600% notes due 2026 (2.60% 2026 notes) [Member] | LIBOR [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Derivative, effective interest rate | 1.80% | 1.80% |  | 1.80% | 1.80% | 1.80% | 1.80%
Notes payable [Member] | 2.00% €750 million notes due 2026 (2.00% 2026 euro Notes) |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate, stated percentage | 2.00% |  |  | 2.00% | 2.00% | 2.00% |
Notes payable [Member] | 2.45% notes due 2030 (2.45% 2030 Notes) |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate, stated percentage | 2.45% |  |  | 2.45% | 2.45% | 2.45% |
Notional amount | $ 1,000 | $ 1,000 |  |  |  |  |
Notes payable [Member] | 2.45% notes due 2030 (2.45% 2030 Notes) | LIBOR [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Derivative, effective interest rate | 1.00% | 1.00% |  | 1.00% | 1.00% | 1.00% | 1.00%
Notes payable [Member] | 2.30% notes due 2031 (2.30% 2031 Notes) |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate, stated percentage | 2.30% |  |  | 2.30% | 2.30% | 2.30% |
Notional amount | $ 500 | $ 500 |  |  |  |  |
Notes payable [Member] | 2.30% notes due 2031 (2.30% 2031 Notes) | LIBOR [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Derivative, effective interest rate | 0.80% | 0.80% |  | 0.80% | 0.80% | 0.80% | 0.80%
Notes payable [Member] | 4.663% notes due 2051 (4.663% 2051 Notes) |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate, stated percentage | 4.663% |  |  | 4.663% | 4.663% | 4.663% |
Notional amount | $ 1,500 | $ 1,500 |  |  |  |  |
Notes payable [Member] | 4.663% notes due 2051 (4.663% 2051 Notes) | LIBOR [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Derivative, effective interest rate | 4.10% | 4.10% |  | 4.10% | 4.10% | 4.10% | 4.10%
Notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Face amount | $ 7,000 | $ 5,000 | 9,000 |  |  |  |
Repayments of debt | $ 0 | $ 4,200 | $ 6,500 |  |  |  |
Notes | 3.45% notes due 2020 (3.45% 2020 Notes) |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate, stated percentage |  |  | 3.45% |  |  |  |
Repayments of debt |  |  | $ 900 |  |  |  |
Notes | 4.10% notes due 2021 (4.10% 2021 Notes) |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate, stated percentage |  |  | 4.10% |  |  |  |
Repayments of debt |  |  | $ 1,000 |  |  |  |
Notes | 3.875% notes due 2021 (3.875% 2021 Notes) |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate, stated percentage |  |  | 3.875% |  |  |  |
Repayments of debt |  |  | $ 1,750 |  |  |  |
Notes | 3.625% Notes Due 2022 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate, stated percentage |  | 3.625% | 3.625% |  |  |  | 3.625%
Repayments of debt |  | $ 750 |  |  |  |  |
Notes | 0.41% Swiss Franc Bonds Due 2023 (0.41% 2023 Swiss franc Bonds) |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate, stated percentage | 0.41% |  |  | 0.41% | 0.41% | 0.41% |
Face amount | SFr |  |  |  | SFr 700,000,000 |  |  |
Notes | 3.625% notes due 2024 (3.625% 2024 Notes) |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate, stated percentage | 3.625% |  | 3.625% | 3.625% | 3.625% | 3.625% |
Notes | 3.125% notes due 2025 (3.125% 2025 Notes) |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate, stated percentage | 3.125% |  | 3.125% | 3.125% | 3.125% | 3.125% |
Notes | 2.600% notes due 2026 (2.60% 2026 notes) [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate, stated percentage | 2.60% |  | 2.60% | 2.60% | 2.60% | 2.60% |
Notes | 2.00% €750 million notes due 2026 (2.00% 2026 euro Notes) |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate, stated percentage | 2.00% |  |  | 2.00% | 2.00% | 2.00% |
Face amount | € |  |  |  |  | € 750,000,000 |  |
Notes | 5.50% 2026 pound sterling Notes [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate, stated percentage | 5.50% |  |  | 5.50% | 5.50% | 5.50% |
Face amount | £ |  |  |  |  |  | £ 475,000,000 |
Notes | 6.375% notes due 2037 (6.375% 2037 Notes) |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate, stated percentage | 6.375% |  |  | 6.375% | 6.375% | 6.375% |
Debt Conversion, Converted Instrument, Amount |  |  | $ 74 |  |  |  |
Notes | 4.00% 2029 pound sterling Notes [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate, stated percentage | 4.00% |  |  | 4.00% | 4.00% | 4.00% |
Face amount | £ |  |  |  |  |  | £ 700,000,000 |
Notes | 2.45% notes due 2030 (2.45% 2030 Notes) |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate, stated percentage | 2.45% | 2.45% | 2.45% | 2.45% | 2.45% | 2.45% | 2.45%
Notional amount |  | $ 1,000 |  |  |  |  |
Face amount |  |  | $ 1,250 |  |  |  |
Notes | 2.30% notes due 2031 (2.30% 2031 Notes) |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate, stated percentage | 2.30% | 2.30% | 2.30% | 2.30% | 2.30% | 2.30% | 2.30%
Notional amount |  | $ 500 |  |  |  |  |
Face amount |  |  | $ 1,250 |  |  |  |
Notes | 6.90% notes due 2038 (6.90% 2038 Notes) |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate, stated percentage | 6.90% |  |  | 6.90% | 6.90% | 6.90% |
Debt Conversion, Converted Instrument, Amount |  |  | $ 37 |  |  |  |
Notes | 6.40% notes due 2039 (6.40% 2039 Notes) |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate, stated percentage | 6.40% |  | 6.40% | 6.40% | 6.40% | 6.40% |
Debt Conversion, Converted Instrument, Amount |  |  | $ 133 |  |  |  |
Notes | 5.75% notes due 2040 (5.75% 2040 Notes) |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate, stated percentage | 5.75% |  |  | 5.75% | 5.75% | 5.75% |
Debt Conversion, Converted Instrument, Amount |  |  | 39 |  |  |  |
Notes | 5.15% notes due 2041 (5.15% 2041 Notes) |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate, stated percentage | 5.15% |  |  | 5.15% | 5.15% | 5.15% |
Debt Conversion, Converted Instrument, Amount |  |  | 245 |  |  |  |
Notes | 5.65% notes due 2042 (5.65% 2042 Notes) |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate, stated percentage | 5.65% |  |  | 5.65% | 5.65% | 5.65% |
Debt Conversion, Converted Instrument, Amount |  |  | 72 |  |  |  |
Notes | 5.375% notes due 2043 (5.375% 2043 Notes) |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate, stated percentage | 5.375% |  |  | 5.375% | 5.375% | 5.375% |
Debt Conversion, Converted Instrument, Amount |  |  | $ 76 |  |  |  |
Notes | 4.663% notes due 2051 (4.663% 2051 Notes) |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate, stated percentage | 4.663% |  | 4.663% | 4.663% | 4.663% | 4.663% |
Notes | 2.77% notes due 2053 (2.77% 2053 Notes) |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate, stated percentage | 2.77% |  | 2.77% | 2.77% | 2.77% | 2.77% |
Face amount |  |  | $ 940 |  |  |  |
Debt exchange additional cash consideration |  |  | 85 |  |  |  |
Debt Instrument, Unamortized Discount |  |  | $ 264 |  |  |  |
Notes | 1.25% 2022 euro Notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Notional amount | € |  |  |  |  |  |  | € 1,250,000,000
Notes | 2.125% notes due 2020 (2.125% 2020 Notes) |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate, stated percentage |  |  | 2.125% |  |  |  |
Repayments of debt |  |  | $ 750 |  |  |  |

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