Segments (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Segment Reporting Information [Line Items]
Total sales	$ 8,193	$ 8,211
Total operating profit	1,933	1,480
Other charges (Note 2)	(18)	4
Operating Segments
Segment Reporting Information [Line Items]
Total sales	8,193	8,211
Total operating profit	2,206	1,905
Segment Reconciling Items
Segment Reporting Information [Line Items]
Other charges (Note 2)	(18)	4
Purchase accounting impacts - Linde AG	(255)	(429)
Americas
Segment Reporting Information [Line Items]
Total sales	3,551	3,241
Americas | Operating Segments
Segment Reporting Information [Line Items]
Total sales	3,551	3,241
Total operating profit	1,025	904
EMEA
Segment Reporting Information [Line Items]
Total sales	2,177	2,148
EMEA | Operating Segments
Segment Reporting Information [Line Items]
Total sales	2,177	2,148
Total operating profit	607	503
APAC
Segment Reporting Information [Line Items]
Total sales	1,598	1,602
APAC | Operating Segments
Segment Reporting Information [Line Items]
Total sales	1,598	1,602
Total operating profit	423	399
Engineering
Segment Reporting Information [Line Items]
Total sales	540	728
Engineering | Operating Segments
Segment Reporting Information [Line Items]
Total sales	540	728
Total operating profit	149	143
Engineering | Intersegment Eliminations
Segment Reporting Information [Line Items]
Total sales	(294)	(231)
Other
Segment Reporting Information [Line Items]
Total sales	327	492
Other | Operating Segments
Segment Reporting Information [Line Items]
Total sales	327	492
Total operating profit	$ 2	$ (44)