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Financing arrangements - Debt Extinguishment (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Repayments of debt	$ 3,600,000,000	$ 1,454,000,000	$ 0
Extinguishment of debt, amount	659,000,000	647,000,000	297,000,000
Gain on extinguishment of debt	$ 215,000,000	$ 225,000,000	78,000,000
Notes
Debt Instrument [Line Items]
Repayments of debt			$ 0
Notes | 3.15% notes due 2040 (3.15% 2040 Notes)
Debt Instrument [Line Items]
Interest rate, stated percentage	3.15%	3.15%
Notes | 2.80% notes due 2041 (2.80% 2041 Notes)
Debt Instrument [Line Items]
Interest rate, stated percentage	2.80%	2.80%	2.80%
Notes | 3.375% notes due 2050 (3.375% 2050 Notes)
Debt Instrument [Line Items]
Interest rate, stated percentage	3.375%	3.375%
Notes | 3.00% notes due 2052 (3.00% 2052 Notes)
Debt Instrument [Line Items]
Interest rate, stated percentage	3.00%	3.00%	3.00%
Notes | 4.20% notes due 2052 (4.20% 2052 Notes)
Debt Instrument [Line Items]
Interest rate, stated percentage	4.20%	4.20%	4.20%
Notes | 4.40% notes due 2062 (4.40% 2062 Notes)
Debt Instrument [Line Items]
Interest rate, stated percentage	4.40%	4.40%	4.40%
Notes | 2.00% notes due 2032 (2.00% 2032 Notes)
Debt Instrument [Line Items]
Interest rate, stated percentage	2.00%	2.00%	2.00%
Notes | 2.20% notes due 2027 (2.20% 2027 Notes)
Debt Instrument [Line Items]
Interest rate, stated percentage	2.20%		2.20%
Notes | 1.65% notes due in 2028 (1.65% 2028 Notes)
Debt Instrument [Line Items]
Interest rate, stated percentage	1.65%		1.65%
Notes | Term loan due April 2025
Debt Instrument [Line Items]
Repayments of debt	$ 2,000,000,000.0
Notes | Term loan due October 2026
Debt Instrument [Line Items]
Repayments of debt	200,000,000
Notes | 3.625% notes due 2024 (3.625% 2024 Notes)
Debt Instrument [Line Items]
Repayments of debt	$ 1,400,000,000
Interest rate, stated percentage	3.625%
Notes | 2.25% Notes Due 2023
Debt Instrument [Line Items]
Interest rate, stated percentage		2.25%
Notes | 0.41% Notes Due 2023
Debt Instrument [Line Items]
Interest rate, stated percentage		0.41%
Notes | Various Long-Term Notes
Debt Instrument [Line Items]
Repayments of debt	$ 875,000,000	$ 881,000,000	$ 378,000,000

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

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