XML 14 R1.htm IDEA: XBRL DOCUMENT v3.10.0.1
Document and Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2018
Feb. 11, 2019
Jun. 30, 2018
Entity Information [Line Items]      
Entity Registrant Name Quad/Graphics, Inc.    
Entity Central Index Key 0001481792    
Current Fiscal Year End Date --12-31    
Entity Filer Category Large Accelerated Filer    
Document Type 10-K    
Document Period End Date Dec. 31, 2018    
Document Fiscal Year Focus 2018    
Document Fiscal Period Focus FY    
Amendment Flag false    
Trading Symbol QUAD    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Public Float     $ 631,416,217
Common Class A      
Entity Information [Line Items]      
Entity Common Stock, Shares Outstanding   38,374,368  
Common Class B      
Entity Information [Line Items]      
Entity Common Stock, Shares Outstanding   13,556,858  
Common Class C      
Entity Information [Line Items]      
Entity Common Stock, Shares Outstanding   0