Segments (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Segment Reporting Information [Line Items]
Total sales	$ 8,204	$ 8,457	$ 16,397	$ 16,668
Total operating profit	2,011	589	3,944	2,069
Other charges (Note 2)	(22)	(993)	(40)	(989)
Operating Segments
Segment Reporting Information [Line Items]
Total sales	8,204	8,457	16,397	16,668
Total operating profit	2,286	1,988	4,492	3,893
Segment Reconciling Items
Segment Reporting Information [Line Items]
Other charges (Note 2)	(22)	(993)	(40)	(989)
Purchase accounting impacts - Linde AG	(253)	(406)	(508)	(835)
Americas
Segment Reporting Information [Line Items]
Total sales	3,541	3,518	7,092	6,759
Americas | Operating Segments
Segment Reporting Information [Line Items]
Total sales	3,541	3,518	7,092	6,759
Total operating profit	1,070	910	2,095	1,814
EMEA
Segment Reporting Information [Line Items]
Total sales	2,160	2,144	4,337	4,292
EMEA | Operating Segments
Segment Reporting Information [Line Items]
Total sales	2,160	2,144	4,337	4,292
Total operating profit	630	536	1,237	1,039
APAC
Segment Reporting Information [Line Items]
Total sales	1,683	1,651	3,281	3,253
APAC | Operating Segments
Segment Reporting Information [Line Items]
Total sales	1,683	1,651	3,281	3,253
Total operating profit	472	426	895	825
Engineering
Segment Reporting Information [Line Items]
Total sales	495	644	1,035	1,372
Engineering | Operating Segments
Segment Reporting Information [Line Items]
Total sales	495	644	1,035	1,372
Total operating profit	107	105	256	248
Engineering | Intersegment Eliminations
Segment Reporting Information [Line Items]
Total sales	(335)	(246)	(629)	(477)
Other
Segment Reporting Information [Line Items]
Total sales	325	500	652	992
Other | Operating Segments
Segment Reporting Information [Line Items]
Total sales	325	500	652	992
Total operating profit	$ 7	$ 11	$ 9	$ (33)