Revenue Recognition - Schedule of Revenue by Distribution Method (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Disaggregation of Revenue [Line Items]
Total segment sales	$ 8,204	$ 8,457	$ 16,397	$ 16,668
Americas
Disaggregation of Revenue [Line Items]
Total segment sales	3,541	3,518	7,092	6,759
EMEA
Disaggregation of Revenue [Line Items]
Total segment sales	2,160	2,144	4,337	4,292
APAC
Disaggregation of Revenue [Line Items]
Total segment sales	1,683	1,651	3,281	3,253
Engineering
Disaggregation of Revenue [Line Items]
Total segment sales	495	644	1,035	1,372
Other
Disaggregation of Revenue [Line Items]
Total segment sales	325	500	652	992
Merchant
Disaggregation of Revenue [Line Items]
Total segment sales	2,421	2,177	4,771	4,220
Merchant | Americas
Disaggregation of Revenue [Line Items]
Total segment sales	1,094	941	2,137	1,815
Merchant | EMEA
Disaggregation of Revenue [Line Items]
Total segment sales	704	634	1,404	1,248
Merchant | APAC
Disaggregation of Revenue [Line Items]
Total segment sales	570	562	1,122	1,078
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	40	108	79
On-Site
Disaggregation of Revenue [Line Items]
Total segment sales	1,926	2,290	3,912	4,458
On-Site | Americas
Disaggregation of Revenue [Line Items]
Total segment sales	756	1,049	1,560	1,931
On-Site | EMEA
Disaggregation of Revenue [Line Items]
Total segment sales	493	610	1,031	1,241
On-Site | APAC
Disaggregation of Revenue [Line Items]
Total segment sales	677	631	1,321	1,286
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	2,962	2,755	5,903	5,447
Packaged Gas | Americas
Disaggregation of Revenue [Line Items]
Total segment sales	1,638	1,473	3,276	2,906
Packaged Gas | EMEA
Disaggregation of Revenue [Line Items]
Total segment sales	946	884	1,874	1,775
Packaged Gas | APAC
Disaggregation of Revenue [Line Items]
Total segment sales	366	389	721	750
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	12	9	32	16
Other
Disaggregation of Revenue [Line Items]
Total segment sales	895	1,235	1,811	2,543
Other | Americas
Disaggregation of Revenue [Line Items]
Total segment sales	53	55	119	107
Other | EMEA
Disaggregation of Revenue [Line Items]
Total segment sales	17	16	28	28
Other | APAC
Disaggregation of Revenue [Line Items]
Total segment sales	70	69	117	139
Other | Engineering
Disaggregation of Revenue [Line Items]
Total segment sales	495	644	1,035	1,372
Other | Other
Disaggregation of Revenue [Line Items]
Total segment sales	$ 260	$ 451	$ 512	$ 897
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%	26.00%	29.00%	25.00%
Revenue from Contract with Customer | Sales Channel | On-Site
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	23.00%	27.00%	24.00%	27.00%
Revenue from Contract with Customer | Sales Channel | Packaged Gas
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	36.00%	33.00%	36.00%	33.00%
Revenue from Contract with Customer | Sales Channel | Other
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	11.00%	15.00%	11.00%	15.00%