2.2.0.25truefalse41701 - Disclosure - Summary of Quarterly Information (Parenthetical) (Details)truefalseIn Millions, except Per Share datafalse1falsefalseUSDfalsefalse10/1/2010 - 12/31/2010
USD ($) / shares
USD ($)
$Duration_10_1_2010_To_12_31_20104http://www.sec.gov/CIK0000936468duration2010-10-01T00:00:002010-12-31T00:00:00Unit13Dividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$2falsefalseUSDfalsefalse4/1/2010 - 6/30/2010
USD ($)
USD ($) / shares
$Duration_4_1_2010_To_6_30_2010http://www.sec.gov/CIK0000936468duration2010-04-01T00:00:002010-06-30T00:00:00Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170Unit13Dividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0USDUSD$3falsefalseUSDfalsefalse1/1/2010 - 3/31/2010
USD ($) / shares
USD ($)
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USD ($) / shares
USD ($)
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USD ($)
USD ($) / shares
$Duration_1_1_2009_To_12_31_2009http://www.sec.gov/CIK0000936468duration2009-01-01T00:00:002009-12-31T00:00:00Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170Unit13Dividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0Unit1Standardhttp://www.xbrl.org/2003/instancesharesxbrli0Unit14Standardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$6falsefalseUSDtruefalse{us-gaap_ComponentOfOtherIncomeNonoperatingAxis} : Tax Relief, Unemployment Insurance Reauthorization, and Job Creation Act of 2010 [Member]
10/1/2010 - 12/31/2010
USD ($)
USD ($) / shares
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7/1/2010 - 9/30/2010
USD ($)
USD ($) / shares
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10/1/2010 - 12/31/2010
USD ($)
USD ($) / shares
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7/1/2009 - 9/30/2009
USD ($) / shares
USD ($)
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10/1/2010 - 12/31/2010
USD ($)
USD ($) / shares
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10/1/2010 - 12/31/2010
USD ($)
USD ($) / shares
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-Publisher FASB
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-Number 95
-Paragraph 28
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 144
-Paragraph 47
-Subparagraph b
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