Accumulated Other Comprehensive Loss (Tables)

12 Months Ended

Dec. 31, 2023

Equity [Abstract]

Changes in Accumulated Other Comprehensive Loss by Component

The following table shows the changes in accumulated other comprehensive income (loss) by component. Amounts in parentheses indicate debits.

(Millions of dollars)	Pension Benefits		Other Benefits		Other		Total
Balance as of December 31, 2021	$	(117)	$	49	$	1	$	(67)
Other comprehensive income (loss) before reclassifications, net of tax of $11	(70)		129		(1)		58
Amounts reclassified from accumulated other comprehensive loss:
Amortization of prior service credit(a)	(45)		(22)		—		(67)
Amortization of actuarial loss(a)	4		6		—		10
Settlement loss(a)	79		—		—		79
Tax effect	(14)		3		—		(11)
Other comprehensive income (loss)	(46)		116		(1)		69
Balance as of December 31, 2022	$	(163)	$	165	$	—	$	2

(Millions of dollars)	Pension Benefits		Other Benefits		Other		Total
Balance as of December 31, 2022	$	(163)	$	165	$	—	$	2
Other comprehensive income (loss) before reclassifications, net of tax of $(22)	(60)		(21)		2		(79)
Amounts reclassified from accumulated other comprehensive loss:
Amortization of prior service credit(a)	(45)		(22)		—		(67)
Amortization of actuarial gain(a)	(5)		—		—		(5)
Settlement gain(a)	(1)		—		—		(1)
Other	—		—		(1)		(1)
Tax effect	13		7		—		20
Other comprehensive income (loss)	(98)		(36)		1		(133)
Balance as of December 31, 2023	$	(261)	$	129	$	1	$	(131)

(a)These accumulated other comprehensive loss components are included in the computation of net periodic benefit cost. See Note 25.