Share-Based Payments (Tables)

6 Months Ended

Jun. 30, 2021

Share-based Payment Arrangement [Abstract]

Components of Share-based Compensation Expense

The components of share-based compensation expense are as follows:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(MILLIONS OF DOLLARS)	2021		2020		2021		2020
Stock options / stock appreciation rights	$	3	$	2	$	5	$	5
RSUs / DSUs	9		9		17		17
PSUs	4		5		7		10
Share-based compensation expense—total(a)	$	16	$	16	$	29	$	32

(a) Amounts capitalized to inventory were insignificant for the three and six months ended June 30, 2021 and 2020.