Share-Based Payments (Tables)

9 Months Ended

Sep. 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				Nine Months Ended
	September 30,				September 30,
(MILLIONS OF DOLLARS)	2021		2020		2021		2020
Stock options / stock appreciation rights	$	2	$	2	$	7	$	7
RSUs / DSUs	8		7		25		24
PSUs	5		5		12		15
Share-based compensation expense—total(a)	$	15	$	14	$	44	$	46

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