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Property, Plant & Equipment - Net - Property, Plant & Equipment - Net (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment
Gross balance	$ 47,999	$ 44,318
Less: accumulated depreciation	(19,288)	(15,254)
Property. plant and equipment - net	28,711	29,064
Production plants
Property, Plant and Equipment
Gross balance	28,226	25,493
Storage tanks
Property, Plant and Equipment
Gross balance	4,461	4,295
Transportation equipment and other
Property, Plant and Equipment
Gross balance	2,978	2,809
Cylinders
Property, Plant and Equipment
Gross balance	4,491	4,184
Buildings
Property, Plant and Equipment
Gross balance	3,327	3,162
Land and improvements
Property, Plant and Equipment
Gross balance	1,259	1,229
Construction in progress
Property, Plant and Equipment
Gross balance	$ 3,257	$ 3,146
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

X

- Definition

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

+ References

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

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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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