Document and Entity Information - shares
6 Months Ended
Jun. 30, 2018
Aug. 06, 2018
Document Information [Line Items]    
Entity Registrant Name SPIRIT REALTY CAPITAL, INC.  
Trading Symbol SRC  
Entity Central Index Key 0001308606  
Current Fiscal Year End Date --12-31  
Entity Filer Category Large Accelerated Filer  
Document Type 10-Q  
Document Period End Date Jun. 30, 2018  
Document Fiscal Year Focus 2018  
Document Fiscal Period Focus Q2  
Amendment Flag false  
Entity Common Stock, Shares Outstanding   428,566,702
Spirit Realty, L.P.    
Document Information [Line Items]    
Entity Registrant Name SPIRIT REALTY, L.P.  
Current Fiscal Year End Date --12-31  
Entity Filer Category Non-accelerated Filer  
Document Type 10-Q  
Document Period End Date Jun. 30, 2018  
Document Fiscal Year Focus 2018  
Document Fiscal Period Focus Q2  
Amendment Flag false