2.2.0.25falsefalse20802 - Disclosure - Commercial Paper and Long-Term Debt (Policy)truefalsefalse1falsefalseUSDfalsefalse1/1/2010 - 12/31/2010 USD ($) USD ($) / shares $Duration_1_1_2010_To_12_31_2010http://www.sec.gov/CIK0000731766duration2010-01-01T00:00:002010-12-31T00:00:00Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170Unit13Standardhttp://www.xbrl.org/2003/instancepurexbrli0Unit1Standardhttp://www.xbrl.org/2003/instancesharesxbrli0Unit14Dividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0USDUSD$2true0unh_CommercialPaperAndLongTermDebtAbstractunhfalsenadurationCommercial Paper And Long-Term Debt [Abstract]falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringCommercial Paper And Long-Term Debt [Abstract]falsefalse3false0unh_InterestRateSwapContractPolicyTextBlockunhfalsenadurationInterest rate swap contract policyfalsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00<div> <div> <p style="margin-top: 12px; margin-bottom: 0px;"><font style="font-family: Times New Roman;" class="_mt" size="2"> </font></p> <p style="margin-top: 18px; margin-bottom: 0px;"><font style="font-family: Times New Roman;" class="_mt" size="2"><b><i>Interest Rate Swap Contracts </i></b></font></p> <p style="margin-top: 6px; margin-bottom: 0px;"><font style="font-family: Times New Roman;" class="_mt" size="2">During 2010, the Company entered into interest rate swap contracts to convert a portion of its interest rate exposure from fixed rates to floating rates to more closely align interest expense with interest income received on its cash equivalent and investment balances. The floating rates are benchmarked to LIBOR. The swaps are designated as fair value hedges on fixed-rate debt issues maturing between <font class="_mt">March 2011 through March 2016 and June 2017 through October 2020</font>. Since the specific terms and notional amounts of the swaps match those of the debt being hedged, they were assumed to be highly effective hedges and all changes in fair value of the swaps were recorded on the Consolidated Balance Sheets with no net impact recorded in the Consolidated Statements of Operations.</font></p></div> </div>Interest Rate Swap Contracts During 2010, the Company entered into interest rate swap contracts to convert a portion of its interest rate exposure from fixedfalsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringInterest rate swap contract policyNo authoritative reference available.falsefalse12Commercial Paper and Long-Term Debt (Policy)UnKnownUnKnownUnKnownUnKnownfalsetrue