Property, Plant & Equipment - Net - Property, Plant & Equipment - Net (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment
Gross balance	$ 48,456	$ 47,999
Less: accumulated depreciation	(22,453)	(19,288)
Property. plant and equipment - net	26,003	28,711
Production plants
Property, Plant and Equipment
Gross balance	29,120	28,226
Storage tanks
Property, Plant and Equipment
Gross balance	4,441	4,461
Transportation equipment and other
Property, Plant and Equipment
Gross balance	2,973	2,978
Cylinders
Property, Plant and Equipment
Gross balance	4,474	4,491
Buildings
Property, Plant and Equipment
Gross balance	3,265	3,327
Land and improvements
Property, Plant and Equipment
Gross balance	1,121	1,259
Construction in progress
Property, Plant and Equipment
Gross balance	$ 3,062	$ 3,257
Minimum
Property, Plant and Equipment
Useful life	3 years
Minimum \| Production plants
Property, Plant and Equipment
Useful life	10 years
Minimum \| Storage tanks
Property, Plant and Equipment
Useful life	15 years
Minimum \| Transportation equipment and other
Property, Plant and Equipment
Useful life	3 years
Minimum \| Cylinders
Property, Plant and Equipment
Useful life	10 years
Minimum \| Buildings
Property, Plant and Equipment
Useful life	25 years
Minimum \| Land and improvements
Property, Plant and Equipment
Useful life	0 years
Maximum
Property, Plant and Equipment
Useful life	40 years
Maximum \| Production plants
Property, Plant and Equipment
Useful life	20 years
Maximum \| Storage tanks
Property, Plant and Equipment
Useful life	20 years
Maximum \| Transportation equipment and other
Property, Plant and Equipment
Useful life	15 years
Maximum \| Cylinders
Property, Plant and Equipment
Useful life	30 years
Maximum \| Buildings
Property, Plant and Equipment
Useful life	40 years
Maximum \| Land and improvements
Property, Plant and Equipment
Useful life	20 years

Amount of accumulated depreciation and amortization from plant, property, and equipment and right-of-use asset from finance lease.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
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-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
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Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123391704&loc=SL77918638-209977

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Amount, after accumulated depreciation and amortization, of property, plant, and equipment and finance lease right-of-use asset.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
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-Section 50
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-URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918686-209980

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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
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