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Financing arrangements - Debt Repayments and Redemptions (Details) € in Millions	12 Months Ended
	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2021 EUR (€)	Mar. 31, 2023 USD ($)	Dec. 31, 2022 CHF (SFr)
Debt Instrument [Line Items]
Repayments of debt	$ 1,454,000,000	$ 0	$ 4,150,000,000
Interest expense, net	2,875,000,000	1,406,000,000	1,197,000,000
Notes
Debt Instrument [Line Items]
Face amount		7,000,000,000	5,000,000,000		$ 24,000,000,000
Repayments of debt		$ 0	4,200,000,000
Interest expense, net			$ 24,000,000
2.25% notes due 2023 (2.25% 2023 Notes) \| Notes
Debt Instrument [Line Items]
Face amount	750,000,000
Interest rate, stated percentage		2.25%				2.25%
0.41% CHF700 million bonds due 2023 (0.41% 2023 Swiss franc Bonds) \| Cross-currency swap contract gains (losses) \| Cash flow hedge
Debt Instrument [Line Items]
Notional amount	$ 704,000,000
0.41% CHF700 million bonds due 2023 (0.41% 2023 Swiss franc Bonds) \| Notes
Debt Instrument [Line Items]
Face amount \| SFr						SFr 700,000,000
Interest rate, stated percentage	0.41%	0.41%			0.41%	0.41%
1.25% notes due 2022 (1.25% 2022 Notes) \| Notes
Debt Instrument [Line Items]
Interest rate, stated percentage			1.25%
Repayments of debt			$ 1,400,000,000	€ 1,250
2.70% notes due 2022 (2.70% 2022 Notes) \| Notes
Debt Instrument [Line Items]
Interest rate, stated percentage			2.70%
Repayments of debt			$ 500,000,000
2.65% notes due 2022 (2.65% 2022 Notes) \| Notes
Debt Instrument [Line Items]
Interest rate, stated percentage			2.65%
Repayments of debt			$ 1,500,000,000
3.625% Notes Due 2022 \| Notes
Debt Instrument [Line Items]
Interest rate, stated percentage			3.625%
Repayments of debt			$ 750,000,000