Pension And Postretirement Plan Expenses

6 Months Ended

Mar. 31, 2013

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,
	2012			2013		2012		2013
Service cost	$	20		27		42		53
Interest cost	59			57		119		113
Expected return on plan assets	(79		)	(83	)	(159	)	(166	)
Net amortization	43			58		86		116
Total	$	43		59		88		116

Higher expense reflects a lower discount rate at the end of 2012.