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USD ($)
USD ($) / shares
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USD ($)
USD ($) / shares
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USD ($)
USD ($) / shares
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-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 19
-Subparagraph a
-Article 5
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 13
-Subparagraph 2, 3
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 16
-Subparagraph a(1)
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12/31/2010
USD ($)
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12/31/2009
USD ($)
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12/31/2008
USD ($)
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-Name Regulation S-X (SX)
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12/31/2010
USD ($)
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12/31/2009
USD ($)
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12/31/2008
USD ($)
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-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 19
-Subparagraph b
-Article 5
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12/31/2010
USD ($)
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12/31/2009
USD ($)
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12/31/2008
USD ($)
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-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 19
-Subparagraph b
-Article 5
falsefalse318Short-term borrowings (Details) (USD $)MillionsUnKnownUnKnownUnKnowntruetrue
