2.2.0.25truefalse41101 - Disclosure - Fair Value Measurements (Narrative) (Details)truefalseIn Billionsfalse1falsefalseUSDfalsefalse1/30/2011
USD ($)
USD ($) / shares
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USD ($)
USD ($) / shares
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-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 16
-Article 9
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1/30/2011
USD ($)
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1/31/2010
USD ($)
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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
-Paragraph 10
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