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Financing arrangements - Debt Repayments (Details) € in Millions, $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2022 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2021 EUR (€)	Dec. 31, 2020 USD ($)
Debt Instrument [Line Items]
Repayments of debt		$ 0	$ 4,150		$ 6,450
Make-whole payments recognized in interest expense		1,406	1,197		1,262
Extinguishment of Debt, Amount	$ 297
Gain (Loss) on Extinguishment of Debt	$ 78
Notes
Debt Instrument [Line Items]
Repayments of debt		$ 0	4,200		6,500
Make-whole payments recognized in interest expense			24		96
Notes | 4.50% notes due 2020 (4.50% 2020 Notes)
Debt Instrument [Line Items]
Repayments of debt					$ 300
Interest rate, stated percentage					4.50%
Notes | 2.125% notes due 2020 (2.125% 2020 Notes)
Debt Instrument [Line Items]
Repayments of debt					$ 750
Interest rate, stated percentage					2.125%
Notes | Floating Rate Notes Due 2020
Debt Instrument [Line Items]
Repayments of debt					$ 300
Notes | 2.20% notes due 2020 (2.20% 2020 Notes)
Debt Instrument [Line Items]
Repayments of debt					$ 700
Interest rate, stated percentage					2.20%
Notes | 3.45% notes due 2020 (3.45% 2020 Notes)
Debt Instrument [Line Items]
Repayments of debt					$ 900
Interest rate, stated percentage					3.45%
Notes | 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 | 1.85% notes due 2021 (1.85% 2021 Notes)
Debt Instrument [Line Items]
Repayments of debt					$ 750
Interest rate, stated percentage					1.85%
Notes | 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 | 1.25% notes due 2022 (1.25% 2022 Notes)
Debt Instrument [Line Items]
Repayments of debt			$ 1,400	€ 1,250
Interest rate, stated percentage			1.25%	1.25%
Notes | 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 | 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 | 3.625% Notes Due 2022
Debt Instrument [Line Items]
Repayments of debt			$ 750
Interest rate, stated percentage			3.625%	3.625%	3.625%
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%
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%
Notes | 2.80% notes due 2041 (2.80% 2041 Notes)
Debt Instrument [Line Items]
Interest rate, stated percentage	2.80%	2.80%
Notes | 3.00% notes due 2052 (3.00% 2052 Notes)
Debt Instrument [Line Items]
Interest rate, stated percentage	3.00%	3.00%	3.00%	3.00%

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Contractual interest rate for funds borrowed, under the debt agreement.

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