Debt (Tables)

12 Months Ended

Sep. 30, 2011

Debt [Abstract]

Summary of short term debt

	2011		2010
Loans Payable
Domestic	$	200,000	$	200,000
Foreign		34,910		2,727
Current portion of long-term debt		22		31
	$	234,932	$	202,758

Summary of Long-Term Debt

	2011		2010
Domestic notes due through 2013 (average year-end interest rate: 1.05% — 2011; 1.0% — 2010)	$	8,030	$	8,058
4.55% Notes due April 15, 2013		205,581		207,992
4.90% Notes due April 15, 2018		204,164		204,710
5.00% Notes due May 15, 2019		494,743		494,196
3.25% Notes due November 12, 2020		695,461		—
7.00% Debentures due August 1, 2027		168,000		168,000
6.70% Debentures due August 1, 2028		167,050		167,050
6.00% Notes due May 15, 2039		245,413		245,351
5.00% Notes due November 12, 2040		296,223		—
	$	2,484,665	$	1,495,357

Summary of interest costs and payment

	2011		2010		2009
Charged to operations	$	84,019	$	51,263	$	40,389
Capitalized		37,929		36,436		29,360
Total interest costs	$	121,948	$	87,699	$	69,749
Interest paid, net of amounts capitalized	$	68,447	$	58,401	$	25,544