XML 57 R59.htm IDEA: XBRL DOCUMENT v2.4.1.9
Fair Value Measurements - Carrying Values and Estimated Fair Values of Financial Instruments (Details) (USD $)
In Millions, unless otherwise specified
Jan. 31, 2015
Oct. 31, 2014
Estimate of Fair Value Measurement [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Retail Notes $ 229us-gaap_LoansReceivableFairValueDisclosure
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Notes Receivable 7us-gaap_NotesReceivableFairValueDisclosure
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Reported Value Measurement [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
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Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
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Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
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Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
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Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
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Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
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Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
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Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
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Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
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Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
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Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
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[1] The carrying value represents the consolidated financial statement amount of the debt which excludes the allocation of the conversion feature to equity, while the fair value is based on internally developed valuation techniques such as discounted cash flow modeling for Level 3 convertible notes which include the equity feature.