Revenue Recognition - Schedule of Revenue by Distribution Method (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disaggregation of Revenue [Line Items]
Sales	$ 32,854	$ 33,364	$ 30,793
Merchant
Disaggregation of Revenue [Line Items]
Sales	9,603	8,691	7,860
On-Site
Disaggregation of Revenue [Line Items]
Sales	7,825	8,934	7,345
Packaged Gas
Disaggregation of Revenue [Line Items]
Sales	11,654	10,871	10,551
Other
Disaggregation of Revenue [Line Items]
Sales	3,772	4,868	5,037
Americas
Disaggregation of Revenue [Line Items]
Sales	14,304	13,874	12,103
Americas | Merchant
Disaggregation of Revenue [Line Items]
Sales	4,370	3,786	3,279
Americas | On-Site
Disaggregation of Revenue [Line Items]
Sales	3,246	4,048	3,225
Americas | Packaged Gas
Disaggregation of Revenue [Line Items]
Sales	6,457	5,831	5,456
Americas | Other
Disaggregation of Revenue [Line Items]
Sales	231	209	143
EMEA
Disaggregation of Revenue [Line Items]
Sales	8,542	8,443	7,643
EMEA | Merchant
Disaggregation of Revenue [Line Items]
Sales	2,773	2,509	2,227
EMEA | On-Site
Disaggregation of Revenue [Line Items]
Sales	1,980	2,415	1,824
EMEA | Packaged Gas
Disaggregation of Revenue [Line Items]
Sales	3,735	3,466	3,539
EMEA | Other
Disaggregation of Revenue [Line Items]
Sales	54	53	53
APAC
Disaggregation of Revenue [Line Items]
Sales	6,559	6,480	6,133
APAC | Merchant
Disaggregation of Revenue [Line Items]
Sales	2,242	2,220	2,181
APAC | On-Site
Disaggregation of Revenue [Line Items]
Sales	2,599	2,471	2,296
APAC | Packaged Gas
Disaggregation of Revenue [Line Items]
Sales	1,416	1,523	1,532
APAC | Other
Disaggregation of Revenue [Line Items]
Sales	302	266	124
Engineering
Disaggregation of Revenue [Line Items]
Sales	2,160	2,762	2,867
Engineering | Merchant
Disaggregation of Revenue [Line Items]
Sales	0	0	0
Engineering | On-Site
Disaggregation of Revenue [Line Items]
Sales	0	0	0
Engineering | Packaged Gas
Disaggregation of Revenue [Line Items]
Sales	0	0	0
Engineering | Other
Disaggregation of Revenue [Line Items]
Sales	2,160	2,762	2,867
Other
Disaggregation of Revenue [Line Items]
Sales	1,289	1,805	2,047
Other | Merchant
Disaggregation of Revenue [Line Items]
Sales	218	176	173
Other | On-Site
Disaggregation of Revenue [Line Items]
Sales	0	0	0
Other | Packaged Gas
Disaggregation of Revenue [Line Items]
Sales	46	51	24
Other | Other
Disaggregation of Revenue [Line Items]
Sales	$ 1,025	$ 1,578	$ 1,850
Sales | Revenue from Contract with Customer Benchmark
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	100.00%	100.00%	100.00%
Sales | Revenue from Contract with Customer Benchmark | Merchant
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	29.00%	26.00%	26.00%
Sales | Revenue from Contract with Customer Benchmark | On-Site
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	24.00%	27.00%	24.00%
Sales | Revenue from Contract with Customer Benchmark | Packaged Gas
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	35.00%	33.00%	34.00%
Sales | Revenue from Contract with Customer Benchmark | Other
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	12.00%	14.00%	16.00%