2.2.0.25truefalse40403 - Disclosure - Note 4. Share-Based Compensation (Restricted Stock Rights) (Narrative) (Details)truefalseIn Millions, unless otherwise specifiedfalse1falsefalseUSDfalsefalse2/1/2010 - 1/31/2011
USD ($)
USD ($) / shares
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2/1/2010 - 1/31/2011
USD ($)
USD ($) / shares
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2/1/2009 - 1/31/2010
USD ($)
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2/1/2008 - 1/31/2009
USD ($)
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2/1/2010 - 1/31/2011
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2/1/2010 - 1/31/2011
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{us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis} : Maximum [Member]
2/1/2010 - 1/31/2011
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{us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis} : Minimum [Member]
2/1/2010 - 1/31/2011
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2/1/2010 - 1/31/2011
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2/1/2010 - 1/31/2011
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2/1/2010 - 1/31/2011
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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph a
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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph h
falsefalse6false0us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognitionus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse2.32.3falsefalsefalsetruefalse3falsefalsefalse00falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalseOtherxbrli:decimalItemTypedecimalThe weighted average period over which unrecognized compensation is expected to be recognized for share-based compensation plans, using a decimal to express in number of years.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph h
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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph c(2)
falsefalse116Note 4. Share-Based Compensation (Restricted Stock Rights) (Narrative) (Details) (USD $)MillionsUnKnownUnKnownUnKnowntruetrue
