Benefit Plans (Tables)

3 Months Ended

Dec. 31, 2012

Net Pension and Postretirement Cost

Net pension and postretirement cost included the following components for the three months ended December 31:

	Pension Plans						Other Postretirement Benefits
	2012			2011			2012			2011
Service cost	$	20,943		$	23,029		$	1,443		$	1,470
Interest cost		21,684			27,989			2,518			3,215
Expected return on plan assets		(29,084	)		(31,772	)		—			—
Amortization of prior service credit		(3,260	)		(3,370	)		(285	)		(173	)
Amortization of loss		18,731			17,196			977			1,162
Net pension and postretirement cost	$	29,014		$	33,072		$	4,653		$	5,674