Segment Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Segment Reporting Information [Line Items]
Sales	$ 8,615	$ 8,356	$ 25,222	$ 24,723
Depreciation and amortization	961	960	2,813	2,867
Total operating profit	2,367	2,086	6,905	6,365
Cost reduction program and other charges	(11)	145	44	145
Interest expense - net	64	68	191	203
Net pension and OPEB cost (benefit), excluding service cost	(57)	(45)	(172)	(144)
Income Before Income Taxes and Equity Investments	2,360	2,063	6,886	6,306
Operating Segments
Segment Reporting Information [Line Items]
Sales	8,615	8,356	25,222	24,723
Variable costs	3,347	3,351	9,818	9,812
Fixed costs and other	1,951	1,808	5,630	5,521
Depreciation and amortization	759	720	2,222	2,150
Total operating profit	2,558	2,477	7,552	7,240
Purchase accounting impacts - Linde AG (a)	202	246	603	730
Intersegment Eliminations
Segment Reporting Information [Line Items]
Sales	104	119	323	353
Segment Reconciling Items
Segment Reporting Information [Line Items]
Purchase accounting impacts - Linde AG (a)	202	240	591	717
Americas
Segment Reporting Information [Line Items]
Sales	3,846	3,618	11,324	10,833
Americas | Operating Segments
Segment Reporting Information [Line Items]
Sales	3,846	3,618	11,324	10,833
Variable costs	1,454	1,363	4,273	4,024
Fixed costs and other	813	741	2,385	2,318
Depreciation and amortization	380	361	1,121	1,091
Total operating profit	1,199	1,153	3,545	3,400
EMEA
Segment Reporting Information [Line Items]
Sales	2,178	2,111	6,371	6,293
EMEA | Operating Segments
Segment Reporting Information [Line Items]
Sales	2,178	2,111	6,371	6,293
Variable costs	734	783	2,188	2,358
Fixed costs and other	487	462	1,396	1,362
Depreciation and amortization	176	163	504	479
Total operating profit	781	703	2,283	2,094
APAC
Segment Reporting Information [Line Items]
Sales	1,741	1,716	4,935	4,964
APAC | Operating Segments
Segment Reporting Information [Line Items]
Sales	1,741	1,716	4,935	4,964
Variable costs	867	860	2,418	2,476
Fixed costs and other	213	194	585	583
Depreciation and amortization	171	165	501	487
Total operating profit	490	497	1,431	1,418
Engineering
Segment Reporting Information [Line Items]
Sales	519	611	1,635	1,694
Engineering | Operating Segments
Segment Reporting Information [Line Items]
Sales	519	611	1,635	1,694
Variable costs	175	256	596	644
Fixed costs and other	235	239	710	722
Depreciation and amortization	8	8	24	24
Total operating profit	101	108	305	304
Engineering | Intersegment Eliminations
Segment Reporting Information [Line Items]
Sales	728	504	1,948	1,380
Other
Segment Reporting Information [Line Items]
Sales	331	300	957	939
Other | Operating Segments
Segment Reporting Information [Line Items]
Sales	331	300	957	939
Variable costs	117	89	343	310
Fixed costs and other	203	172	554	536
Depreciation and amortization	24	23	72	69
Total operating profit	$ (13)	$ 16	$ (12)	$ 24