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Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)
12 Months Ended 0 Months Ended
Dec. 28, 2014
Dec. 23, 2013
Dec. 29, 2013
Aug. 31, 2012
Significant Accounting Policies [Line Items]        
Number of TV Stations Owned by VIE, Total 7gci_NumberofTVStationsOwnedbyVIETotal      
Consolidated Variable Interest Entities [Abstract]        
Current assets 1,480,465,000us-gaap_AssetsCurrent   $ 1,923,485,000us-gaap_AssetsCurrent  
Plant, property and equipment, net 1,609,215,000us-gaap_PropertyPlantAndEquipmentNet   1,669,632,000us-gaap_PropertyPlantAndEquipmentNet  
Intangible and other assets 8,115,775,000gci_IntangibleAssetsAndOtherAssetsNoncurrent   5,647,589,000gci_IntangibleAssetsAndOtherAssetsNoncurrent  
Total assets 60,000,000us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssets   44,700,000us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssets  
Current liabilities 1,127,936,000us-gaap_LiabilitiesCurrent   1,007,192,000us-gaap_LiabilitiesCurrent  
Noncurrent liabilities 6,567,776,000us-gaap_LiabilitiesNoncurrent   5,324,103,000us-gaap_LiabilitiesNoncurrent  
Number of Phoenix TV Stations Owned by VIE Non-Consolidated 2gci_NumberofPhoenixTVStationsOwnedbyVIENonConsolidated      
Number of StLouis TV Stations Owned by VIE Non-Consolidated 1gci_NumberofStLouisTVStationsOwnedbyVIENonConsolidated      
Total Number of TV Stations Owned by VIE Non-Consolidated 3gci_TotalNumberofTVStationsOwnedbyVIENonConsolidated      
Assets held for sale 69,998,000us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent   395,851,000us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent  
Number of TV Stations Owned by VIE Consolidated 4gci_NumberofTVStationsOwnedbyVIEConsolidated      
Other Businesses        
Consolidated Variable Interest Entities [Abstract]        
Investments in non-public businesses, non-operating expense 8,300,000us-gaap_CostMethodInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= gci_OtherBusinessesMember
  2,700,000us-gaap_CostMethodInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= gci_OtherBusinessesMember
 
Building and Building Improvements | Minimum        
Consolidated Variable Interest Entities [Abstract]        
Property, plant and equipment, useful life (in years) 10 years      
Building and Building Improvements | Maximum        
Consolidated Variable Interest Entities [Abstract]        
Property, plant and equipment, useful life (in years) 40 years      
Machinery and Equipment | Minimum        
Consolidated Variable Interest Entities [Abstract]        
Property, plant and equipment, useful life (in years) 3 years      
Machinery and Equipment | Maximum        
Consolidated Variable Interest Entities [Abstract]        
Property, plant and equipment, useful life (in years) 30 years      
Restricted Stock        
Consolidated Variable Interest Entities [Abstract]        
Requisite service period 4 years      
Performance Shares        
Consolidated Variable Interest Entities [Abstract]        
Requisite service period 3 years      
Stock Options        
Consolidated Variable Interest Entities [Abstract]        
Award vesting period 4 years      
Career Builder        
Consolidated Variable Interest Entities [Abstract]        
Percentage of ownership interests in subsidiary 52.90%us-gaap_MinorityInterestOwnershipPercentageByParent
/ dei_LegalEntityAxis
= gci_CareerBuilderMember
     
Belo        
Significant Accounting Policies [Line Items]        
Payments to acquire businesses   1,470,000,000us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= gci_BeloMember
   
Total principal long-term debt   715,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_BusinessAcquisitionAxis
= gci_BeloMember
   
Economic Modeling Specialists Intl | Career Builder        
Consolidated Variable Interest Entities [Abstract]        
Percentage of ownership interests in subsidiary       74.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
/ us-gaap_BusinessAcquisitionAxis
= gci_EconomicModelingSpecialistsIntlMember
/ dei_LegalEntityAxis
= gci_CareerBuilderMember
Shareholder ownership       26.00%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
/ us-gaap_BusinessAcquisitionAxis
= gci_EconomicModelingSpecialistsIntlMember
/ dei_LegalEntityAxis
= gci_CareerBuilderMember
VIE Consolidated for Four Stations in Louisville, KY; Portland OR; and Tucson, AZ        
Consolidated Variable Interest Entities [Abstract]        
Current assets 20,541,000us-gaap_AssetsCurrent
/ us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis
= gci_VIEConsolidatedforFourStationsinLouisvilleKYPortlandORandTucsonAZMember
  4,677,000us-gaap_AssetsCurrent
/ us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis
= gci_VIEConsolidatedforFourStationsinLouisvilleKYPortlandORandTucsonAZMember
 
Plant, property and equipment, net 10,084,000us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis
= gci_VIEConsolidatedforFourStationsinLouisvilleKYPortlandORandTucsonAZMember
  8,061,000us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis
= gci_VIEConsolidatedforFourStationsinLouisvilleKYPortlandORandTucsonAZMember
 
Intangible and other assets 29,412,000gci_IntangibleAssetsAndOtherAssetsNoncurrent
/ us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis
= gci_VIEConsolidatedforFourStationsinLouisvilleKYPortlandORandTucsonAZMember
  32,008,000gci_IntangibleAssetsAndOtherAssetsNoncurrent
/ us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis
= gci_VIEConsolidatedforFourStationsinLouisvilleKYPortlandORandTucsonAZMember
 
Total assets 60,037,000us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssets
/ us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis
= gci_VIEConsolidatedforFourStationsinLouisvilleKYPortlandORandTucsonAZMember
  44,746,000us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssets
/ us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis
= gci_VIEConsolidatedforFourStationsinLouisvilleKYPortlandORandTucsonAZMember
 
Current liabilities 11,635,000us-gaap_LiabilitiesCurrent
/ us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis
= gci_VIEConsolidatedforFourStationsinLouisvilleKYPortlandORandTucsonAZMember
  7,827,000us-gaap_LiabilitiesCurrent
/ us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis
= gci_VIEConsolidatedforFourStationsinLouisvilleKYPortlandORandTucsonAZMember
 
Noncurrent liabilities 26,028,000us-gaap_LiabilitiesNoncurrent
/ us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis
= gci_VIEConsolidatedforFourStationsinLouisvilleKYPortlandORandTucsonAZMember
  34,173,000us-gaap_LiabilitiesNoncurrent
/ us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis
= gci_VIEConsolidatedforFourStationsinLouisvilleKYPortlandORandTucsonAZMember
 
Total liabilities 37,663,000us-gaap_VariableInterestEntityConsolidatedCarryingAmountLiabilities
/ us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis
= gci_VIEConsolidatedforFourStationsinLouisvilleKYPortlandORandTucsonAZMember
  $ 42,000,000us-gaap_VariableInterestEntityConsolidatedCarryingAmountLiabilities
/ us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis
= gci_VIEConsolidatedforFourStationsinLouisvilleKYPortlandORandTucsonAZMember