Capitalization And Short-Term Borrowings (Schedule Of Long-Term Debt) (Details) (USD $) In Thousands, unless otherwise specified					12 Months Ended				12 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013 7.4% Due March 2023 To June 2025 [Member]		Sep. 30, 2012 7.4% Due March 2023 To June 2025 [Member]		Sep. 30, 2013 3.75% To 8.75% Due April 2018 To March 2023 [Member]		Sep. 30, 2012 3.75% To 8.75% Due April 2018 To March 2023 [Member]		Sep. 30, 2012 5.25% Medium Term Notes Due March 2013 [Member]	Nov. 01, 2011 6.70% Medium-Term Notes November 2011 [Member]
Debt Instrument [Line Items]
Debt interest rate, minimum					7.40%				3.75%
Debt interest rate, maximum									8.75%
Medium-Term Notes					$ 99,000	[1]	$ 99,000	[1]
Notes									1,550,000	[1],[2]	1,300,000	[1],[2]
Total Long-Term Debt	1,649,000		1,399,000
Less Current Portion	0	[3]	250,000	[3]
Long-term debt, excluding current portion	$ 1,649,000		$ 1,149,000
Long-term debt, interest rate													5.25%	6.70%
Percentage of principal amount									101.00%		101.00%

[1] The Medium-Term Notes and Notes are unsecured.

[2] The holders of these notes may require the Company to repurchase their notes at a price equal to 101% of the principal amount in the event of both a change in control and a ratings downgrade to a rating below investment grade.

[3] None of the Company’s long-term debt at September 30, 2013 will mature within the following twelve-month period. Current Portion of Long-Term Debt at September 30, 2012 consisted of $250.0 million of 5.25% notes that matured in March 2013.