Debt (Tables)

12 Months Ended

Dec. 31, 2023

Debt Disclosure [Abstract]

Schedule of debt

Our long-term total debt consisted of the following:

	December 31
Millions of dollars	2023		2022
5.0% senior notes due November 2045	$	1,911	$	2,000
4.85% senior notes due November 2035	1,000		1,000
2.92% senior notes due March 2030	1,000		1,000
7.45% senior notes due September 2039	946		1,000
4.75% senior notes due August 2043	879		900
6.7% senior notes due September 2038	763		800
4.5% senior notes due November 2041	500		500
3.8% senior notes due November 2025	382		400
7.6% senior debentures due August 2096	228		294
6.75% notes due February 2027	90		104
Other	5		6
Unamortized debt issuance costs and discounts	(68)		(76)
Total long-term debt	$	7,636	$	7,928