Fair Value (Details 3) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Carrying Reported Amount Fair Value Disclosure [Member]
Grouping Financial Statement Captions
Long-term debt	$ 7,157,870	$ 6,954,293
Total Fair Value
Grouping Financial Statement Captions
Long-term debt	$ 7,983,009	$ 7,317,476

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

No definition available.

Name:	us-gaap_LongTermDebtFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant