2.2.0.25truefalse135 - Disclosure - CASH AND INVESTMENTS - Additional Information (Detail)truefalseIn Millionsfalse1falsefalseUSDfalsefalse3/31/2011
USD ($)
USD ($) / shares
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USD ($)
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3/31/2011
USD ($)
$eol_PE10216---1110-Q0006_STD_0_20110331_0_410838x432222http://www.sec.gov/CIK0001090727instant2011-03-31T00:00:000001-01-01T00:00:00falsefalseSelf-insurance requirementsus-gaap_ScheduleOfAvailableForSaleSecuritiesMajorTypesOfDebtAndEquitySecuritiesAxisxbrldihttp://xbrl.org/2006/xbrldiups_SelfInsuranceProgramMemberus-gaap_ScheduleOfAvailableForSaleSecuritiesMajorTypesOfDebtAndEquitySecuritiesAxisexplicitMemberiso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$4falsefalseUSDtruefalse{us-gaap_ScheduleOfAvailableForSaleSecuritiesMajorTypesOfDebtAndEquitySecuritiesAxis} : Self-insurance requirements
12/31/2010
USD ($)
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