v2.4.0.6

Fair Value of Financial Instruments (Narrative) (Details) (USD $) In Billions, unless otherwise specified	Mar. 31, 2013
Fair Value Disclosures [Abstract]
Fair value of debt utilizing discounted cash flow analyses	$ 2.1

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- Details

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- Definition

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.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant