Segments (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Segment Reporting Information [Line Items]
Total sales	$ 8,155	$ 8,797	$ 24,552	$ 25,465
Total operating profit	2,052	1,613	5,996	3,682
Other charges (Note 2)	(2)	(15)	(42)	(1,004)
Operating Segments
Segment Reporting Information [Line Items]
Total sales	8,155	8,797	24,552	25,465
Total operating profit	2,306	2,010	6,798	5,903
Segment Reconciling Items
Segment Reporting Information [Line Items]
Other charges (Note 2)	(2)	(15)	(42)	(1,004)
Purchase accounting impacts - Linde AG	(252)	(382)	(760)	(1,217)
Americas
Segment Reporting Information [Line Items]
Total sales	3,629	3,694	10,721	10,453
Americas | Operating Segments
Segment Reporting Information [Line Items]
Total sales	3,629	3,694	10,721	10,453
Total operating profit	1,074	974	3,169	2,788
EMEA
Segment Reporting Information [Line Items]
Total sales	2,105	2,125	6,442	6,417
EMEA | Operating Segments
Segment Reporting Information [Line Items]
Total sales	2,105	2,125	6,442	6,417
Total operating profit	634	465	1,871	1,504
APAC
Segment Reporting Information [Line Items]
Total sales	1,639	1,660	4,920	4,913
APAC | Operating Segments
Segment Reporting Information [Line Items]
Total sales	1,639	1,660	4,920	4,913
Total operating profit	459	429	1,354	1,254
Engineering
Segment Reporting Information [Line Items]
Total sales	467	828	1,502	2,200
Engineering | Operating Segments
Segment Reporting Information [Line Items]
Total sales	467	828	1,502	2,200
Total operating profit	116	150	372	398
Engineering | Intersegment Eliminations
Segment Reporting Information [Line Items]
Total sales	(417)	(251)	(1,046)	(728)
Other
Segment Reporting Information [Line Items]
Total sales	315	490	967	1,482
Other | Operating Segments
Segment Reporting Information [Line Items]
Total sales	315	490	967	1,482
Total operating profit	$ 23	$ (8)	$ 32	$ (41)