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GOODWILL, RADIO BROADCASTING LICENSES AND OTHER INTANGIBLE ASSETS: (Details) (Income Approach Valuation Technique [Member], USD $) | Oct. 01, 2014 | Oct. 01, 2013 | Oct. 01, 2012
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Schedule Of Goodwill, Radio Broadcasting Licenses And Other Intangible Assets [Line Items] |  |  |
Impairment charge (in millions) | $ 0 roia_PreTaxImpairmentCharges | $ 0 roia_PreTaxImpairmentCharges | $ 0 roia_PreTaxImpairmentCharges
Discount Rate | 9.50%roia_DiscountRate | 10.00%roia_DiscountRate | 10.00%roia_DiscountRate
Minimum [Member] |  |  |
Schedule Of Goodwill, Radio Broadcasting Licenses And Other Intangible Assets [Line Items] |  |  |
Year 1 Market Revenue Growth Rate Range | 0.30%roia_Year1MarketRevenueGrowthRange / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember | 0.00%roia_Year1MarketRevenueGrowthRange / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember | 1.00%roia_Year1MarketRevenueGrowthRange / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember
Long-term Market Revenue Growth Rate Range (Years 6 - 10) | 1.00%roia_LongTermMarketRevenueGrowthRateRange / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember | 1.00%roia_LongTermMarketRevenueGrowthRateRange / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember | 1.00%roia_LongTermMarketRevenueGrowthRateRange / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember
Mature Market Share Range | 6.90%roia_MatureMarketShareRange / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember | 6.40%roia_MatureMarketShareRange / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember | 0.70%roia_MatureMarketShareRange / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember
Operating Profit Margin Range | 30.00%roia_OperatingProfitMarginRange / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember | 30.80%roia_OperatingProfitMarginRange / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember | 19.60%roia_OperatingProfitMarginRange / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember
Maximum [Member] |  |  |
Schedule Of Goodwill, Radio Broadcasting Licenses And Other Intangible Assets [Line Items] |  |  |
Year 1 Market Revenue Growth Rate Range | 1.00%roia_Year1MarketRevenueGrowthRange / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember | 2.00%roia_Year1MarketRevenueGrowthRange / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember | 2.00%roia_Year1MarketRevenueGrowthRange / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember
Long-term Market Revenue Growth Rate Range (Years 6 - 10) | 2.00%roia_LongTermMarketRevenueGrowthRateRange / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember | 2.00%roia_LongTermMarketRevenueGrowthRateRange / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember | 2.00%roia_LongTermMarketRevenueGrowthRateRange / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember
Mature Market Share Range | 25.20%roia_MatureMarketShareRange / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember | 26.90%roia_MatureMarketShareRange / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember | 27.40%roia_MatureMarketShareRange / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember
Operating Profit Margin Range | 48.40%roia_OperatingProfitMarginRange / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember | 47.80%roia_OperatingProfitMarginRange / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember | 47.70%roia_OperatingProfitMarginRange / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember

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