Pension & Postretirement Expenses

6 Months Ended

Mar. 31, 2017

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

Pension And Postretirement Plan Expenses

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

	Three Months Ended March 31,						Six Months Ended March 31,
		2016			2017			2016		2017
Service cost		$	23		21			45		42
Interest cost		49			42			99		84
Expected return on plan assets		(88		)	(86	)		(176	)	(172	)
Net amortization		41			53			81		106
Total		$	25		30			49		60