Financial Instruments Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 31, 2013		Dec. 31, 2012
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Interest rate agreements fair value	$ 13,270		$ 11,945
Forward commodity contracts fair value	6,226		(3,513)
Interest rate agreements	672		319
Forward commodity contracts	1,592		3,148
Total other comprehensive income (loss) from hedging, net of tax	21,760	[1]	11,899	[1]
Expected Earnings [Line Items]
Interest Rate Agreement Gain (Loss) Reclassified To Earnings	(29,693)	[2]
Commodity Contract Gain (Loss) Reclassified To Earnings	3,342	[2]
Total Hedge Gain (Loss) Reclassified To Earnings	(26,351)
Next Twelve Months [Member]
Expected Earnings [Line Items]
Interest Rate Agreement Gain (Loss) Reclassified To Earnings	(2,343)
Commodity Contract Gain (Loss) Reclassified To Earnings	3,458
Total Hedge Gain (Loss) Reclassified To Earnings	1,115
Thereafter [Member]
Expected Earnings [Line Items]
Interest Rate Agreement Gain (Loss) Reclassified To Earnings	(27,350)
Commodity Contract Gain (Loss) Reclassified To Earnings	(116)
Total Hedge Gain (Loss) Reclassified To Earnings	$ (27,466)

[1] Utilizing an income tax rate ranging from 37 percent to 39 percent based on the effective rates in each taxing jurisdiction.

[2] (1) Utilizing an income tax rate ranging from 37 percent to 39 percent based on the effective rates in each taxing jurisdiction.