Investments (Tables)

12 Months Ended

Dec. 31, 2022

Investments

Summary of the estimated fair value of short-term investments classified as trading securities

		December 31,
(Millions of dollars)	2022		2021
Domestic equity securities	$	433	$	472
Domestic debt securities		399		542
Foreign equity securities		169		193
Foreign debt securities		66		133
Money market funds held in trading accounts		12		59
Other trading securities		7		17
Total trading short-term investments	$	1,086	$	1,416