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Merger-related Divestitures - Narrative (Details) - USD ($) $ in Millions	1 Months Ended		3 Months Ended		9 Months Ended
	Jul. 31, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Mar. 31, 2020	Dec. 31, 2019	Apr. 30, 2019
Schedule of Equity Method Investments [Line Items]
Net gain on sale of businesses			$ 0	$ 164	$ 0	$ 164
Linde AG South America Divestiture | Discontinued Operations, Disposed of by Sale
Schedule of Equity Method Investments [Line Items]
Consideration paid		$ 2,900
Americas Industrial Gases Business, Plant Sales | Discontinued Operations, Disposed of by Sale
Schedule of Equity Method Investments [Line Items]
Proceeds for incremental plant sales		$ 500
Linde Korea Divestiture | Discontinued Operations, Disposed of by Sale
Schedule of Equity Method Investments [Line Items]
Consideration paid									$ 1,200
Praxair India Divestiture | Discontinued Operations, Disposed of by Sale
Schedule of Equity Method Investments [Line Items]
Consideration paid	$ 218
Net gain on sale of businesses	$ 164
Linde India Divestiture | Discontinued Operations, Disposed of by Sale
Schedule of Equity Method Investments [Line Items]
Consideration paid								$ 193
Linde China Divestiture | Discontinued Operations, Disposed of by Sale
Schedule of Equity Method Investments [Line Items]
Consideration paid							$ 98

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Amount of gain (loss) from sale and disposal of integrated set of activities and assets capable of being conducted and managed for purpose of providing return in form of dividend, lower cost, or other economic benefit to investor, owner, member and participant.

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