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Revenue Recognition - Schedule of Revenue by Distribution Method (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Disaggregation of Revenue [Line Items]
Sales	$ 8,356	$ 8,155	$ 24,723	$ 24,552
Revenue from Contract with Customer | Sales Channel
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	100.00%	100.00%	100.00%	100.00%
Americas
Disaggregation of Revenue [Line Items]
Sales	$ 3,618	$ 3,629	$ 10,833	$ 10,721
EMEA
Disaggregation of Revenue [Line Items]
Sales	2,111	2,105	6,293	6,442
APAC
Disaggregation of Revenue [Line Items]
Sales	1,716	1,639	4,964	4,920
Engineering
Disaggregation of Revenue [Line Items]
Sales	611	467	1,694	1,502
Other
Disaggregation of Revenue [Line Items]
Sales	300	315	939	967
Merchant
Disaggregation of Revenue [Line Items]
Sales	$ 2,501	$ 2,433	$ 7,377	$ 7,203
Merchant | Revenue from Contract with Customer | Sales Channel
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	30.00%	30.00%	30.00%	29.00%
Merchant | Americas
Disaggregation of Revenue [Line Items]
Sales	$ 1,160	$ 1,131	$ 3,455	$ 3,268
Merchant | EMEA
Disaggregation of Revenue [Line Items]
Sales	704	685	2,081	2,089
Merchant | APAC
Disaggregation of Revenue [Line Items]
Sales	589	564	1,686	1,685
Merchant | Engineering
Disaggregation of Revenue [Line Items]
Sales	0	0	0	0
Merchant | Other
Disaggregation of Revenue [Line Items]
Sales	48	53	155	161
On-Site
Disaggregation of Revenue [Line Items]
Sales	$ 1,920	$ 1,967	$ 5,698	$ 5,879
On-Site | Revenue from Contract with Customer | Sales Channel
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	23.00%	24.00%	23.00%	24.00%
On-Site | Americas
Disaggregation of Revenue [Line Items]
Sales	$ 799	$ 843	$ 2,388	$ 2,403
On-Site | EMEA
Disaggregation of Revenue [Line Items]
Sales	441	473	1,294	1,504
On-Site | APAC
Disaggregation of Revenue [Line Items]
Sales	680	651	2,016	1,972
On-Site | Engineering
Disaggregation of Revenue [Line Items]
Sales	0	0	0	0
On-Site | Other
Disaggregation of Revenue [Line Items]
Sales	0	0	0	0
Packaged Gas
Disaggregation of Revenue [Line Items]
Sales	$ 2,935	$ 2,895	$ 8,762	$ 8,797
Packaged Gas | Revenue from Contract with Customer | Sales Channel
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	35.00%	35.00%	35.00%	36.00%
Packaged Gas | Americas
Disaggregation of Revenue [Line Items]
Sales	$ 1,602	$ 1,599	$ 4,825	$ 4,875
Packaged Gas | EMEA
Disaggregation of Revenue [Line Items]
Sales	954	936	2,874	2,810
Packaged Gas | APAC
Disaggregation of Revenue [Line Items]
Sales	371	352	1,041	1,072
Packaged Gas | Engineering
Disaggregation of Revenue [Line Items]
Sales	0	0	0	0
Packaged Gas | Other
Disaggregation of Revenue [Line Items]
Sales	8	8	22	40
Other
Disaggregation of Revenue [Line Items]
Sales	$ 1,000	$ 860	$ 2,886	$ 2,673
Other | Revenue from Contract with Customer | Sales Channel
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	12.00%	11.00%	12.00%	11.00%
Other | Americas
Disaggregation of Revenue [Line Items]
Sales	$ 57	$ 56	$ 165	$ 175
Other | EMEA
Disaggregation of Revenue [Line Items]
Sales	12	11	44	39
Other | APAC
Disaggregation of Revenue [Line Items]
Sales	76	72	221	191
Other | Engineering
Disaggregation of Revenue [Line Items]
Sales	611	467	1,694	1,502
Other | Other
Disaggregation of Revenue [Line Items]
Sales	$ 244	$ 254	$ 762	$ 766

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