Fair value by balance sheet grouping table (Tables)

3 Months Ended

Mar. 31, 2023

Fair Value Disclosures [Abstract]

Schedule of Carrying Values and Estimated Fair Values of Debt Instruments

The carrying amount and fair value of our total debt, including short-term borrowings and current maturities of long-term debt, is as follows:

	March 31, 2023								December 31, 2022
Millions of dollars	Level 1		Level 2		Total fair value		Carrying value		Level 1		Level 2		Total fair value		Carrying value
Total debt	$	6,837	$	939	$	7,776	$	7,930	$	6,539	$	917	$	7,456	$	7,928