Revenue Recognition - Schedule of Revenue by Distribution Method (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Disaggregation of Revenue [Line Items]
Sales	$ 8,495	$ 8,267	$ 16,607	$ 16,367
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	$ 3,812	$ 3,655	$ 7,478	$ 7,215
EMEA
Disaggregation of Revenue [Line Items]
Sales	2,162	2,091	4,193	4,182
APAC
Disaggregation of Revenue [Line Items]
Sales	1,655	1,657	3,194	3,248
Engineering
Disaggregation of Revenue [Line Items]
Sales	551	544	1,116	1,083
Other
Disaggregation of Revenue [Line Items]
Sales	315	320	626	639
Merchant
Disaggregation of Revenue [Line Items]
Sales	$ 2,595	$ 2,489	$ 4,972	$ 4,875
Merchant \| Revenue from Contract with Customer \| Sales Channel
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	31.00%	30.00%	30.00%	30.00%
Merchant \| Americas
Disaggregation of Revenue [Line Items]
Sales	$ 1,260	$ 1,178	$ 2,410	$ 2,295
Merchant \| EMEA
Disaggregation of Revenue [Line Items]
Sales	726	691	1,397	1,377
Merchant \| APAC
Disaggregation of Revenue [Line Items]
Sales	558	568	1,067	1,096
Merchant \| Engineering
Disaggregation of Revenue [Line Items]
Sales	0	0	0	0
Merchant \| Other
Disaggregation of Revenue [Line Items]
Sales	51	52	98	107
On-Site
Disaggregation of Revenue [Line Items]
Sales	$ 2,002	$ 1,887	$ 3,983	$ 3,778
On-Site \| Revenue from Contract with Customer \| Sales Channel
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	24.00%	23.00%	24.00%	23.00%
On-Site \| Americas
Disaggregation of Revenue [Line Items]
Sales	$ 878	$ 807	$ 1,766	$ 1,589
On-Site \| EMEA
Disaggregation of Revenue [Line Items]
Sales	426	412	852	853
On-Site \| APAC
Disaggregation of Revenue [Line Items]
Sales	698	668	1,365	1,336
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	$ 2,976	$ 2,940	$ 5,797	$ 5,826
Packaged Gas \| Revenue from Contract with Customer \| Sales Channel
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	35.00%	36.00%	35.00%	36.00%
Packaged Gas \| Americas
Disaggregation of Revenue [Line Items]
Sales	$ 1,617	$ 1,616	$ 3,189	$ 3,222
Packaged Gas \| EMEA
Disaggregation of Revenue [Line Items]
Sales	1,002	969	1,928	1,920
Packaged Gas \| APAC
Disaggregation of Revenue [Line Items]
Sales	350	348	666	670
Packaged Gas \| Engineering
Disaggregation of Revenue [Line Items]
Sales	0	0	0	0
Packaged Gas \| Other
Disaggregation of Revenue [Line Items]
Sales	7	7	14	14
Other
Disaggregation of Revenue [Line Items]
Sales	$ 922	$ 951	$ 1,855	$ 1,888
Other \| Revenue from Contract with Customer \| Sales Channel
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	10.00%	11.00%	11.00%	11.00%
Other \| Americas
Disaggregation of Revenue [Line Items]
Sales	$ 57	$ 54	$ 113	$ 109
Other \| EMEA
Disaggregation of Revenue [Line Items]
Sales	8	19	16	32
Other \| APAC
Disaggregation of Revenue [Line Items]
Sales	49	73	96	146
Other \| Engineering
Disaggregation of Revenue [Line Items]
Sales	551	544	1,116	1,083
Other \| Other
Disaggregation of Revenue [Line Items]
Sales	$ 257	$ 261	$ 514	$ 518