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Segment Information - Narrative (Details) - 12 months ended Dec. 31, 2020	productLine	extensionOption	reportableSegment
Segment Reporting [Abstract]
Number of major product lines	2
Number of geographic segments		3	3

X

- Definition

Number Of Geographic Segments

+ References

No definition available.

+ Details

Name:	lin_NumberOfGeographicSegments
Namespace Prefix:	lin_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number Of Major Product Lines

+ References

No definition available.

+ Details

Name:	lin_NumberOfMajorProductLines
Namespace Prefix:	lin_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_SegmentReportingAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration