Pension And Postretirement Plan Expenses

6 Months Ended

Mar. 31, 2012

Pension And Postretirement Plan Expenses [Abstract]

Pension And Postretirement Plan Expenses

Net periodic pension and net postretirement plan expenses are summarized as follows (in millions):

	Three Months Ended March 31,									Six Months Ended March 31,
	Pension					Postretirement				Pension				Postretirement
	2011			2012		2011		2012		2011		2012		2011		2012
Service cost	$	20		20		1		—		41		41		2		1
Interest cost	56			55		5		4		111		111		9		8
Expected return on plan assets	(82		)	(79	)					(164	)	(159	)
Net amortization	43			46		(2	)	(3	)	85		92		(4	)	(6	)
Total	$	37		42		4		1		73		85		7		3