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Financing arrangements - Debt Issuances (Details) - Notes - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | ---
Debt Instrument [Line Items] |  |  |
Aggregate principal amount of notes issued | $ 7,000 | $ 5,000 | $ 9,000
1.65% notes due in 2028 (1.65% 2028 Notes) |  |  |
Debt Instrument [Line Items] |  |  |
Aggregate principal amount of notes issued |  | $ 1,250 |
Interest rate, stated percentage | 1.65% | 1.65% |
2.00% notes due 2032 (2.00% 2032 Notes) |  |  |
Debt Instrument [Line Items] |  |  |
Aggregate principal amount of notes issued |  | $ 1,250 |
Interest rate, stated percentage |  | 2.00% |
2.80% notes due 2041 (2.80% 2041 Notes) |  |  |
Debt Instrument [Line Items] |  |  |
Aggregate principal amount of notes issued |  | $ 1,150 |
Interest rate, stated percentage |  | 2.80% |
3.00% notes due 2052 (3.00% 2052 Notes) |  |  |
Debt Instrument [Line Items] |  |  |
Aggregate principal amount of notes issued |  | $ 1,350 |
Interest rate, stated percentage | 3.00% | 3.00% |
1.90% notes due 2025 (1.90% 2025 Notes) |  |  |
Debt Instrument [Line Items] |  |  |
Aggregate principal amount of notes issued |  |  | $ 500
Interest rate, stated percentage | 1.90% |  | 1.90%
2.20% notes due 2027 (2.20% 2027 Notes) |  |  |
Debt Instrument [Line Items] |  |  |
Aggregate principal amount of notes issued |  |  | $ 1,750
Interest rate, stated percentage | 2.20% |  | 2.20%
2.45% notes due 2030 (2.45% 2030 Notes) |  |  |
Debt Instrument [Line Items] |  |  |
Aggregate principal amount of notes issued |  |  | $ 1,250
Interest rate, stated percentage | 2.45% | 2.45% | 2.45%
2.30% notes due 2031 (2.30% 2031 Notes) |  |  |
Debt Instrument [Line Items] |  |  |
Aggregate principal amount of notes issued |  |  | $ 1,250
Interest rate, stated percentage | 2.30% | 2.30% | 2.30%
3.15% notes due 2040 (3.15% 2040 Notes) |  |  |
Debt Instrument [Line Items] |  |  |
Aggregate principal amount of notes issued |  |  | $ 2,000
Interest rate, stated percentage | 3.15% |  | 3.15%
3.375% notes due 2050 (3.375% 2050 Notes) |  |  |
Debt Instrument [Line Items] |  |  |
Aggregate principal amount of notes issued |  |  | $ 2,250
Interest rate, stated percentage | 3.375% |  | 3.375%
3.00% notes due 2029 (3.00% 2029 Notes) |  |  |
Debt Instrument [Line Items] |  |  |
Aggregate principal amount of notes issued | $ 750 |  |
Interest rate, stated percentage | 3.00% |  |
4.05% notes due 2029 (4.05% 2029 Notes) |  |  |
Debt Instrument [Line Items] |  |  |
Aggregate principal amount of notes issued | $ 1,250 |  |
Interest rate, stated percentage | 4.05% |  |
3.35% notes due 2032 (3.35% 2032 Notes) |  |  |
Debt Instrument [Line Items] |  |  |
Aggregate principal amount of notes issued | $ 1,000 |  |
Interest rate, stated percentage | 3.35% |  |
4.20% notes due 2033 (4.20% 2033 Notes) |  |  |
Debt Instrument [Line Items] |  |  |
Aggregate principal amount of notes issued | $ 750 |  |
Interest rate, stated percentage | 4.20% |  |
4.20% notes due 2052 (4.20% 2052 Notes) |  |  |
Debt Instrument [Line Items] |  |  |
Aggregate principal amount of notes issued | $ 1,000 |  |
Interest rate, stated percentage | 4.20% |  |
4.875% notes due 2053 (4.875% 2053 Notes) |  |  |
Debt Instrument [Line Items] |  |  |
Aggregate principal amount of notes issued | $ 1,000 |  |
Interest rate, stated percentage | 4.875% |  |
4.40% notes due 2062 (4.40% 2062 Notes) |  |  |
Debt Instrument [Line Items] |  |  |
Aggregate principal amount of notes issued | $ 1,250 |  |
Interest rate, stated percentage | 4.40% |  |

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