Organization and Basis of Presentation SUGS PPA (Details) (USD $) In Millions, unless otherwise specified	Apr. 30, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Business Acquisition, Purchase Price Allocation, Current Assets	$ 113
Business Acquisition, Purchase Price Allocation, Property, Plant and Equipment	1,608
Business Acquisition, Purchase Price Allocation, Goodwill Amount	337
Business Acquisition, Purchase Price Allocation, Other Noncurrent Assets	1
Business Acquisition, Purchase Price Allocation, Assets Acquired	2,059
Business Acquisition, Purchase Price Allocation, Current Liabilities	(93)
Business Acquisition, Purchase Price Allocation, Other Noncurrent Liabilities	(36)
Business Acquisition, Purchase Price Allocation, Assets Acquired (Liabilities Assumed), Net	$ 1,930

Amount of assets acquired at the acquisition date.

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- Definition

Amount of assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer, acquired at the acquisition date.

+ References

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Amount of liabilities due within one year or within the normal operating cycle, if longer, assumed at the acquisition date.

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- Definition

Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 55

-Paragraph 37

-URI http://asc.fasb.org/extlink&oid=25498275&loc=d3e2207-128464

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Amount of liabilities due after one year or the normal operating cycle, if longer, assumed at the acquisition date.

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Amount of other assets expected to be realized or consumed after one year or the normal operating cycle, if longer, acquired at the acquisition date.

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The amount of property, plant, and equipment recognized as of the acquisition date.

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Amount recognized for assets, including goodwill, in excess of (less than) the aggregate liabilities assumed.

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