Income Taxes (Significant Components Of Deferred Tax Liabilities And Assets) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Sep. 30, 2013
Deferred Tax Liabilities [Abstract]
Property, Plant and Equipment	$ 1,584,856	$ 1,504,187
Pension and Other Post-Retirement Benefit Costs	122,864	124,021
Other	55,718	75,419
Total Deferred Tax Liabilities	1,763,438	1,703,627
Deferred Tax Assets [Abstract]
Pension and Other Post-Retirement Benefit Costs	(137,992)	(130,256)
Tax Loss Carryforwards	(160,588)	(215,262)
Other	(102,014)	(90,461)
Total Deferred Tax Assets	(400,594)	(435,979)
Total Net Deferred Income Taxes	1,362,844	1,267,648
Net Deferred Tax Liability/(Asset) - Current	(47,153)	(79,359)
Net Deferred Tax Liability - Non Current	$ 1,409,997	$ 1,347,007