v2.4.0.8
Document and Entity Information
3 Months Ended
Mar. 31, 2015
Apr. 30, 2015
Entity Information [Line Items]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Mar. 31, 2015  
Document Fiscal Year Focus 2015  
Document Fiscal Period Focus Q1  
Trading Symbol CONE  
Entity Registrant Name CyrusOne Inc.  
Entity Central Index Key 0001553023  
Current Fiscal Year End Date --12-31  
Entity Filer Category Large Accelerated Filer  
Entity Common Stock, Shares Outstanding   53,298,200
CyrusOne LP [Member]
   
Entity Information [Line Items]    
Entity Registrant Name CyrusOne LP  
Entity Central Index Key 0001575810  
Entity Filer Category Non-accelerated Filer