Benefit Plans (Tables)

9 Months Ended

Jun. 30, 2021

Retirement Benefits [Abstract]

Net Pension and Postretirement Cost

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

	Three Months Ended June 30,				Nine Months Ended June 30,
(Millions of dollars)	2021		2020		2021		2020
Service cost	$	35	$	37	$	113	$	116
Interest cost	16		21		53		64
Expected return on plan assets	(40)		(46)		(129)		(143)
Amortization of prior service credit	(3)		(3)		(10)		(10)
Amortization of loss	22		24		73		74
Curtailment loss/settlements	6		2		6		2
Net pension cost	$	36	$	35	$	106	$	103