Pension & Postretirement Expenses (Tables)

9 Months Ended

Jun. 30, 2016

Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]

Summary of Pension and Postretirement Plan Expenses

Total periodic pension and postretirement expense is summarized below (in millions):

	Three Months Ended June 30,					Nine Months Ended June 30,
	2015			2016		2015		2016
Service cost	$	27		22		81		67
Interest cost	60			50		181		149
Expected return on plan assets	(92		)	(88	)	(276	)	(264	)
Net amortization	43			40		128		121
Total	$	38		24		114		73