Revenue Recognition (Tables)

3 Months Ended

Mar. 31, 2019

Revenue from Contract with Customer [Abstract]

Schedule of Revenue by Distribution Method

The following tables show sales by distribution method at the consolidated level and for each reportable segment and Other for the quarters ended March 31, 2019 and March 31, 2018.

(Millions of dollars)	March 31, 2019
Sales	Americas		EMEA		APAC		Engineering		Other		Total		%
Merchant	$	704	$	427	$	497	$	—	$	31	$	1,659	24	%
On-Site	703		377		530		—		—		1,610		23	%
Packaged Gas	1,287		874		393		—		—		2,554		37	%
Other	12		4		32		636		437		1,121		16	%
	$	2,706	$	1,682	$	1,452	$	636	$	468	$	6,944	100	%

(Millions of dollars)	March 31, 2018
Sales	Americas		EMEA		APAC		Engineering		Other		Total		%
Merchant	$	694	$	148	$	138	$	—	$	30	$	1,010	34	%
On-Site	559		81		245		—		—		885		30	%
Packaged Gas	591		184		51		—		—		826		28	%
Other	6		2		1		—		253		262		8	%
	$	1,850	$	415	$	435	$	—	$	283	$	2,983	100	%