v3.19.2
Cover Page - USD ($)
 12 Months Ended
Jun. 30, 2019
Jul. 31, 2019
Dec. 31, 2018
Cover page.      
Entity Incorporation, State or Country Code DE    
Document Type 10-K    
Document Annual Report true    
Document Period End Date Jun. 30, 2019    
Document Transition Report false    
Entity File Number 001-33220    
Entity Registrant Name BROADRIDGE FINANCIAL SOLUTIONS, INC.    
Entity Tax Identification Number 33-1151291    
Entity Address, Address Line One 5 DAKOTA DRIVE    
Entity Address, Postal Zip Code 11042    
City Area Code 516    
Local Phone Number 472-5400    
Title of 12(b) Security Common Stock, par value $0.01 per share    
Security Exchange Name NYSE    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Shell Company false    
Entity Central Index Key 0001383312    
Entity Public Float     $ 11,044,292,706
Entity Common Stock, Shares Outstanding (in shares)   114,282,728  
Current Fiscal Year End Date --06-30    
Document Fiscal Year Focus 2019    
Document Fiscal Period Focus FY    
Amendment Flag false    
Trading Symbol BR    
Entity Address, City or Town LAKE SUCCESS    
Entity Address, State or Province NY