Benefit Plans (Tables)

9 Months Ended

Jun. 30, 2011

Benefit Plans [Abstract]

Net pension and postretirement cost

							Other Postretirement
	Pension Plans						Benefits
	2011			2010			2011			2010
Service cost	$	23,114		$	18,070		$	1,463		$	1,252
Interest cost		23,470			22,533			3,289			3,548
Expected return on plan assets		(25,790	)		(24,710	)		—			—
Amortization of prior service (credit) cost		(272	)		(266	)		(171	)		1
Amortization of loss		14,007			10,308			1,117			853
Net pension and postretirement cost	$	34,529		$	25,935		$	5,698		$	5,654

Net pension and postretirement cost included the following components for the nine months ended June 30:

							Other Postretirement
	Pension Plans						Benefits
	2011			2010			2011			2010
Service cost	$	68,767		$	54,781		$	4,381		$	3,755
Interest cost		69,828			68,309			9,856			10,643
Expected return on plan assets		(76,731	)		(74,908	)		—			—
Amortization of prior service (credit) cost		(810	)		(806	)		(515	)		3
Amortization of loss		41,674			31,246			3,349			2,557
Curtailment/settlement loss		1,083			—			—			—
Net pension and postretirement cost	$	103,811		$	78,622		$	17,071		$	16,958