Revenue Recognition - Schedule of Revenue by Distribution Method (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Disaggregation of Revenue [Line Items]
Total segment sales	$ 8,155	$ 8,797	$ 24,552	$ 25,465
Americas
Disaggregation of Revenue [Line Items]
Total segment sales	3,629	3,694	10,721	10,453
EMEA
Disaggregation of Revenue [Line Items]
Total segment sales	2,105	2,125	6,442	6,417
APAC
Disaggregation of Revenue [Line Items]
Total segment sales	1,639	1,660	4,920	4,913
Engineering
Disaggregation of Revenue [Line Items]
Total segment sales	467	828	1,502	2,200
Other
Disaggregation of Revenue [Line Items]
Total segment sales	315	490	967	1,482
Merchant
Disaggregation of Revenue [Line Items]
Total segment sales	2,433	2,242	7,203	6,462
Merchant | Americas
Disaggregation of Revenue [Line Items]
Total segment sales	1,131	986	3,268	2,801
Merchant | EMEA
Disaggregation of Revenue [Line Items]
Total segment sales	685	620	2,089	1,868
Merchant | APAC
Disaggregation of Revenue [Line Items]
Total segment sales	564	593	1,685	1,671
Merchant | Engineering
Disaggregation of Revenue [Line Items]
Total segment sales	0	0	0	0
Merchant | Other
Disaggregation of Revenue [Line Items]
Total segment sales	53	43	161	122
On-Site
Disaggregation of Revenue [Line Items]
Total segment sales	1,967	2,434	5,879	6,893
On-Site | Americas
Disaggregation of Revenue [Line Items]
Total segment sales	843	1,178	2,403	3,110
On-Site | EMEA
Disaggregation of Revenue [Line Items]
Total segment sales	473	651	1,504	1,892
On-Site | APAC
Disaggregation of Revenue [Line Items]
Total segment sales	651	605	1,972	1,891
On-Site | Engineering
Disaggregation of Revenue [Line Items]
Total segment sales	0	0	0	0
On-Site | Other
Disaggregation of Revenue [Line Items]
Total segment sales	0	0	0	0
Packaged Gas
Disaggregation of Revenue [Line Items]
Total segment sales	2,895	2,743	8,797	8,189
Packaged Gas | Americas
Disaggregation of Revenue [Line Items]
Total segment sales	1,599	1,478	4,875	4,383
Packaged Gas | EMEA
Disaggregation of Revenue [Line Items]
Total segment sales	936	841	2,810	2,616
Packaged Gas | APAC
Disaggregation of Revenue [Line Items]
Total segment sales	352	403	1,072	1,153
Packaged Gas | Engineering
Disaggregation of Revenue [Line Items]
Total segment sales	0	0	0	0
Packaged Gas | Other
Disaggregation of Revenue [Line Items]
Total segment sales	8	21	40	37
Other
Disaggregation of Revenue [Line Items]
Total segment sales	860	1,378	2,673	3,921
Other | Americas
Disaggregation of Revenue [Line Items]
Total segment sales	56	52	175	159
Other | EMEA
Disaggregation of Revenue [Line Items]
Total segment sales	11	13	39	41
Other | APAC
Disaggregation of Revenue [Line Items]
Total segment sales	72	59	191	198
Other | Engineering
Disaggregation of Revenue [Line Items]
Total segment sales	467	828	1,502	2,200
Other | Other
Disaggregation of Revenue [Line Items]
Total segment sales	$ 254	$ 426	$ 766	$ 1,323
Revenue from Contract with Customer | Sales Channel
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	100.00%	100.00%	100.00%	100.00%
Revenue from Contract with Customer | Sales Channel | Merchant
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	30.00%	25.00%	29.00%	25.00%
Revenue from Contract with Customer | Sales Channel | On-Site
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	24.00%	28.00%	24.00%	27.00%
Revenue from Contract with Customer | Sales Channel | Packaged Gas
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	35.00%	31.00%	36.00%	32.00%
Revenue from Contract with Customer | Sales Channel | Other
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	11.00%	16.00%	11.00%	15.00%