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N-2 - $ / shares
Sep. 01, 2022
Jun. 30, 2022
Dec. 31, 2021
Cover [Abstract]      
Entity Central Index Key 0001222401    
Amendment Flag false    
Document Type N-CSRS    
Entity Registrant Name BLACKROCK CORPORATE HIGH YIELD FUND, INC.    
General Description of Registrant [Abstract]      
Investment Objectives and Practices [Text Block]
BlackRock Corporate High Yield Fund, Inc.’s (HYT) (the “Trust”)
primary investment objective is to provide shareholders with current income. The Trust’s secondary investment objective is to provide shareholders with capital appreciation. The Trust seeks to achieve its objectives by investing primarily in a diversified portfolio of fixed income securities which are rated at the time of investment to be below investment grade or, if unrated, are considered by the investment adviser to be of comparable quality. The Trust may invest directly in fixed income securities or synthetically through the use of derivatives. 		   
Share Price [Table Text Block]
Market Price and Net Asset Value Per Share Summary
 
    
06/30/22
     
12/31/21
     
Change
    
High
     
Low  
  
Closing Market Price
   $ 9.53      $ 12.34        (22.77 )%    $  12.34      $  9.30    
Net Asset Value
     9.45        11.99        (21.18 )      11.99        9.45    
    
Lowest Price or Bid   $ 9.3  
Highest Price or Bid   12.34  
Lowest Price or Bid, NAV   9.45  
Highest Price or Bid, NAV   11.99  
Latest Share Price   9.53 $ 12.34
Latest NAV   $ 9.45 $ 11.99
Capital Stock, Long-Term Debt, and Other Securities [Abstract]      
Outstanding Security, Authorized [Shares]   200,000,000  
Outstanding Security, Held [Shares]   122,317,200