Equity - Schedule of Stockholders' Equity (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period	$ 44,377	$ 47,620	$ 45,428	$ 49,569
Net income	410	877	1,620	1,895
Other comprehensive income (loss)	(1,545)	446	(1,447)	(215)
Noncontrolling interests:
Additions (reductions)	(53)	7	(49)	(846)
Dividends and other capital changes	(29)	(24)	(36)	(45)
Dividends to Linde plc ordinary share holders	(585)	(549)	(1,177)	(1,102)
Issuances of ordinary shares:
For employee savings and incentive plans	7	(9)	(39)	(11)
Purchases of ordinary shares	(1,572)	(1,187)	(3,324)	(2,093)
Share-based compensation	17	34	51	63
Balance, end of period	$ 41,027	$ 47,215	$ 41,027	$ 47,215
Dividends paid (in dollars per share)	$ 1.17	$ 1.06	$ 2.34	$ 2.12
Linde plc Shareholders’ Equity
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period	$ 42,963	$ 46,210	$ 44,035	$ 47,317
Net income	372	841	1,546	1,821
Other comprehensive income (loss)	(1,528)	437	(1,418)	(218)
Noncontrolling interests:
Additions (reductions)	0	0	0	0
Dividends and other capital changes	0	0	0	0
Dividends to Linde plc ordinary share holders	(585)	(549)	(1,177)	(1,102)
Issuances of ordinary shares:
For employee savings and incentive plans	7	(9)	(39)	(11)
Purchases of ordinary shares	(1,572)	(1,187)	(3,324)	(2,093)
Share-based compensation	17	34	51	63
Balance, end of period	39,674	45,777	39,674	45,777
Noncontrolling Interests
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period	1,414	1,410	1,393	2,252
Net income	38	36	74	74
Other comprehensive income (loss)	(17)	9	(29)	3
Noncontrolling interests:
Additions (reductions)	(53)	7	(49)	(846)
Dividends and other capital changes	(29)	(24)	(36)	(45)
Dividends to Linde plc ordinary share holders	0	0	0	0
Issuances of ordinary shares:
For employee savings and incentive plans	0	0	0	0
Purchases of ordinary shares	0	0	0	0
Share-based compensation	0	0	0	0
Balance, end of period	$ 1,353	$ 1,438	$ 1,353	$ 1,438