Benefit Plans (Tables)

6 Months Ended

Mar. 31, 2024

Retirement Benefits [Abstract]

Net Pension and Postretirement Cost

Net pension cost included the following components for the three and six-month periods:

	Three Months Ended March 31,				Six Months Ended March 31,
(Millions of dollars)	2024		2023		2024		2023
Service cost	$	22	$	22	$	47	$	46
Interest cost	35		32		74		67
Expected return on plan assets	(38)		(35)		(80)		(73)
Amortization of prior service credit	(1)		(2)		(2)		(3)
Amortization of loss	14		15		30		32
Settlement loss	—		1		—		1
Net pension cost	$	33	$	34	$	69	$	70