Benefit Plans (Tables)

6 Months Ended

Mar. 31, 2015

Compensation and Retirement Disclosure [Abstract]

Net Pension and Postretirement Cost

Net pension and postretirement cost included the following components for the three months ended March 31:

	Pension Plans						Other Postretirement Benefits
(Millions of dollars)	2015			2014			2015			2014
Service cost	$	19		$	18		$	1		$	1
Interest cost		21			23			2			2
Expected return on plan assets		(30	)		(31	)		—			—
Amortization of prior service credit		(4	)		(4	)		(1	)		(1	)
Amortization of loss		17			12			1			1
Net pension and postretirement cost	$	23		$	18		$	2		$	2

Net pension and postretirement cost included the following components for the six months ended March 31:

	Pension Plans						Other Postretirement Benefits
(Millions of dollars)	2015			2014			2015			2014
Service cost	$	38		$	35		$	2		$	2
Interest cost		43			46			4			5
Expected return on plan assets		(61	)		(62	)		—			—
Amortization of prior service credit		(8	)		(8	)		(2	)		(2	)
Amortization of loss		34			24			1			1
Net pension and postretirement cost	$	46		$	35		$	4		$	6