Retirement Benefit Liabilities

9 Months Ended

Jun. 30, 2019

Retirement benefit liabilities consisted of the following (in millions):



	June 30, 2019			September 30, 2018
Retiree medical liability	$	79		$	86
Pension liability	163			182
Other	15			13
Subtotal	257			281
Less: current portion (included in compensation and benefits, Note 16)	(19		)	(19		)
Retirement benefits	$	238		$	262

The components of net periodic pension and retiree medical income included in continuing operations for the three months ended June 30 are as follows (in millions):



	2019						2018
	Pension			Retiree Medical			Pension			Retiree Medical
Interest cost	$	13		$	1		$	14		$	1
Assumed return on plan assets	(24		)	—			(25		)	—
Amortization of prior service costs	—			(9		)	—			(9		)
Recognized actuarial loss	6			4			7			5
Total income	$	(5	)	$	(4	)	$	(4	)	$	(3	)

The components of net periodic pension and retiree medical income included in continuing operations for the nine months ended June 30 are as follows (in millions):



	2019						2018
	Pension			Retiree Medical			Pension			Retiree Medical
Interest cost	$	40		$	2		$	41		$	2
Assumed return on plan assets	(73		)	—			(74		)	—
Amortization of prior service costs	—			(26		)	—			(26		)
Recognized actuarial loss	17			12			21			13
Total income	$	(16	)	$	(12	)	$	(12	)	$	(11	)

For the three months ended June 30, 2019 and 2018, the non-service cost components of the net periodic pension and Other Post-Employment Benefits ("OPEB") income were $9 million and $7 million, respectively, and are presented in other income. For the nine months ended June 30, 2019 and 2018, the non-service cost components of the net periodic pension and OPEB income were $28 million and $23 million, respectively, and are presented in other income. We used the practical expedient for retrospective presentation of the 2018 other expense components in this disclosure. Refer to Note 3 for additional details on the adoption of ASU 2017-07.