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Organization (Details) (USD $)
 12 Months Ended 0 Months Ended
Dec. 31, 2014
property
sqft
Dec. 31, 2013
Jun. 13, 2014
Apr. 20, 2012
Jun. 17, 2014
Oct. 05, 2012
Operations [Line Items]            
Common stock, authorized (in shares) 300,000,000us-gaap_CommonStockSharesAuthorized 300,000,000us-gaap_CommonStockSharesAuthorized   150,000,000.0us-gaap_CommonStockSharesAuthorized    
Common stock, par value (in dollars per share) $ 0.01us-gaap_CommonStockParOrStatedValuePerShare $ 0.01us-gaap_CommonStockParOrStatedValuePerShare   $ 0.01us-gaap_CommonStockParOrStatedValuePerShare    
Common stock, outstanding 177,933,175us-gaap_CommonStockSharesOutstanding 15,665,827us-gaap_CommonStockSharesOutstanding        
Proceeds from issuance of common stock and DRIP $ 1,800,000,000arct_ProceedsFromIssuanceOfCommonStockAndDistributionReinvestmentPlan $ 154,200,000arct_ProceedsFromIssuanceOfCommonStockAndDistributionReinvestmentPlan        
Number of real estate properties 307us-gaap_NumberOfRealEstateProperties          
Rentable square feet 16,305,844us-gaap_AreaOfRealEstateProperty          
Occupancy rate 100.00%arct_RealEstatePropertyOccupancyRate          
Weighted average remaining lease term 11 years 7 months 6 days          
Units of limited partner interest in OP (in shares) 22arct_LimitedLiabilityCompanyLlcOrLimitedPartnershipLpMembersOrLimitedPartnersOwnershipInterestUnits          
American Realty Capital Global Special Limited Partner, LLC            
Operations [Line Items]            
Limited partners' contributed capital $ 200us-gaap_LimitedPartnersContributedCapital
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= arct_AmericanRealtyCapitalGlobalSpecialLimitedPartnerLlcMember		          
Europe            
Operations [Line Items]            
Target portfolio investment percent 40.00%arct_PortfolioStrategyTargetGeographicMixPercentageOfPortfolioInvestments
/ invest_InvestmentGeographicRegionAxis
= us-gaap_EuropeMember		          
Actual portfolio investment percentage 39.00%arct_PercentageofPortfolioInvestment
/ invest_InvestmentGeographicRegionAxis
= us-gaap_EuropeMember		          
All Other Regions, Excluding the United States            
Operations [Line Items]            
Target portfolio investment percent 10.00%arct_PortfolioStrategyTargetGeographicMixPercentageOfPortfolioInvestments
/ invest_InvestmentGeographicRegionAxis
= arct_AllOtherRegionsExcludingUnitedStatesMember		          
United States            
Operations [Line Items]            
Actual portfolio investment percentage 61.00%arct_PercentageofPortfolioInvestment
/ invest_InvestmentGeographicRegionAxis
= country_US		          
Europe | Unaffiliated Third Party Property Management Services | Maximum            
Operations [Line Items]            
Property management fee, percent fee 50.00%us-gaap_PropertyManagementFeePercentFee
/ us-gaap_ProductOrServiceAxis
= arct_UnaffiliatedThirdPartyPropertyManagementServicesMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember		          
Common Stock            
Operations [Line Items]            
Share price (in dollars per share)       $ 10us-gaap_SharePrice
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember		   $ 10.00us-gaap_SharePrice
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
Shares available for issuance under a distribution reinvestment plan (in shares)       25,000,000.0arct_StockAvailableForIssuanceSharesDividendReinvestmentPlan
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember		 50,000,000arct_StockAvailableForIssuanceSharesDividendReinvestmentPlan
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember		  
Share reallocated under DRIP (in shares)     23,800,000arct_ShareReallocatedUnderDRIP
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember		      
Additional shares available for issuance under DRIP (in shares)         25,000,000arct_AdditionalSharesAvailableforIssuanceUnderDRIP
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember