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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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USD ($)
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USD ($)
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USD ($)
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USD ($)
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USD ($)
$As_Of_12_31_2011http://www.sec.gov/CIK0000059478instant2011-12-31T00:00:000001-01-01T00:00:00Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$9falsefalseUSDfalsefalse9/30/2010
USD ($)
$As_Of_9_30_20102http://www.sec.gov/CIK0000059478instant2010-09-30T00:00:000001-01-01T00:00:00Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$10falsefalseUSDtruefalse{us-gaap_LongtermDebtTypeAxis} : Fixed-Rate Notes [Member]
3/31/2009
USD ($)
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12/31/2010
USD ($)
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12/31/2009
USD ($)
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-Name Regulation S-X (SX)
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-Name Statement of Financial Accounting Standard (FAS)
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-Name Regulation S-X (SX)
-Number 210
-Section 02
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-Article 5
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-Publisher SEC
-Name Regulation S-X (SX)
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-Name Statement of Financial Accounting Standard (FAS)
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