Variable interest entities - Schedule of carrying amount of assets and liabilities (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023	Sep. 30, 2023	Dec. 31, 2022
Assets
Cash and cash equivalents	$ 2,978	$ 6,341	$ 5,722
Accounts receivable, net	6,422	4,507	5,972
Inventories	4,644	4,291	4,191
Other current assets	694	478	430
Total current assets	14,840	16,885	16,315
Property, plant and equipment, net	21,289	17,841	18,103
Goodwill	10,906	9,158	9,545	$ 9,199
Operating lease right-of-use assets, net	1,322	1,292	1,237
Other noncurrent assets	830	632	692
Total assets	51,221	47,469	47,631
Liabilities
Accounts payable	2,963	3,149	2,954
Accrued expenses	2,513	2,296	2,457
Current portion of long-term debt	3,065	1,759	1,687
Operating lease liabilities	271	255	245
Other current liabilities	1,703	2,072	1,675
Total current liabilities	10,668	10,013	9,191
Long-term debt	10,672	9,776	9,535
Deferred income tax liabilities	3,168	2,738	3,050
Noncurrent operating lease liabilities	1,117	1,125	1,065
Other noncurrent liabilities	2,430	2,196	2,142
Total liabilities	28,055	25,848	24,983
Variable interest entity, primary beneficiary
Assets
Cash and cash equivalents	20	19	32
Accounts receivable, net	39	31	33
Inventories	101	99	97
Other current assets	56	51	48
Total current assets	216	200	210
Property, plant and equipment, net	882	923	913
Goodwill	197	200	488
Operating lease right-of-use assets, net	5	5	5
Other noncurrent assets	13	11	9
Total assets	1,313	1,339	1,625
Liabilities
Accounts payable	80	92	83
Accrued expenses	52	36	46
Current portion of long-term debt	77	98	108
Operating lease liabilities	1	1	1
Other current liabilities	23	25	23
Total current liabilities	233	252	261
Long-term debt	329	297	290
Deferred income tax liabilities	98	106	104
Noncurrent operating lease liabilities	4	5	5
Other noncurrent liabilities	20	17	15
Total liabilities	$ 684	$ 677	$ 675