Transaction Costs and Other Charges (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Unusual or Infrequent Item, or Both [Line Items]
Other Nonrecurring (Income) Expense	$ 31	$ 14	$ 74	$ 35
Net Income (Loss) Attributable to Parent			1,403	1,214
Transaction Costs [Member]
Unusual or Infrequent Item, or Both [Line Items]
Other Nonrecurring (Income) Expense	21	14	64	35
Argentina Hyper-Inflation Charge [Member]
Unusual or Infrequent Item, or Both [Line Items]
Other Nonrecurring (Income) Expense	10
Net Income (Loss) Attributable to Parent	$ 10
Income (Loss) from Continuing Operations, Per Diluted Share	$ (0.03)
Transaction Costs and Other Charges [Member]
Unusual or Infrequent Item, or Both [Line Items]
Net Income (Loss) Attributable to Parent	$ 29	$ 13	$ 67	$ 34
Income (Loss) from Continuing Operations, Per Diluted Share	$ (0.10)	$ (0.05)	$ (0.23)	$ (0.12)
Transaction Costs [Member]
Unusual or Infrequent Item, or Both [Line Items]
Net Income (Loss) Attributable to Parent	$ 19		$ 57
Transaction Costs		$ 13		$ 34
Income (Loss) from Continuing Operations, Per Diluted Share	$ (0.07)	$ (0.05)	$ (0.20)	$ (0.12)

The amount of net income (loss) derived from continuing operations during the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

PRAXAIR INC 10-Q